Bump podspec version

Not sure why I ever added this code. Possibly to ignore a glitch on older versions of iOS? It works fine now on iOS 13, though.

.travis.yml

@@ -1,8 +1,12 @@
 language: objective-c
 xcode_workspace: FLEX.xcworkspace
+xcode_sdk: iphonesimulator
+before_install:
+    - gem install xcpretty
 matrix:
     include:
         - xcode_scheme: UICatalog
-          xcode_sdk: iphonesimulator
         - xcode_scheme: FLEX
-          xcode_sdk: iphonesimulator
+script:
+    - set -o pipefail
+    - xcodebuild -workspace $TRAVIS_XCODE_WORKSPACE -scheme $TRAVIS_XCODE_SCHEME -sdk $TRAVIS_XCODE_SDK build | xcpretty

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+# Contributing to FLEX #
+
+We welcome contributions! Please open a pull request with your changes. 

Classes/Core/FLEXCarouselCell.h

@@ -0,0 +1,15 @@
+//
+//  FLEXCarouselCell.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/17/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXCarouselCell : UICollectionViewCell
+
+@property (nonatomic, copy) NSString *title;
+
+@end

Classes/Core/FLEXCarouselCell.m

@@ -0,0 +1,91 @@
+//
+//  FLEXCarouselCell.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/17/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXCarouselCell.h"
+#import "FLEXColor.h"
+#import "UIView+FLEX_Layout.h"
+
+@interface FLEXCarouselCell ()
+@property (nonatomic, readonly) UILabel *titleLabel;
+@property (nonatomic, readonly) UIView *selectionIndicatorStripe;
+@property (nonatomic) BOOL constraintsInstalled;
+@end
+
+@implementation FLEXCarouselCell
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        _titleLabel = [UILabel new];
+        _selectionIndicatorStripe = [UIView new];
+
+        self.titleLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+        self.titleLabel.adjustsFontForContentSizeCategory = YES;
+        self.selectionIndicatorStripe.backgroundColor = self.tintColor;
+
+        [self.contentView addSubview:self.titleLabel];
+        [self.contentView addSubview:self.selectionIndicatorStripe];
+
+        [self installConstraints];
+
+        [self updateAppearance];
+    }
+
+    return self;
+}
+
+- (void)updateAppearance {
+    self.selectionIndicatorStripe.hidden = !self.selected;
+
+    if (self.selected) {
+        self.titleLabel.textColor = self.tintColor;
+    } else {
+        self.titleLabel.textColor = [FLEXColor deemphasizedTextColor];
+    }
+}
+
+#pragma mark Public
+
+- (NSString *)title {
+    return self.titleLabel.text;
+}
+
+- (void)setTitle:(NSString *)title {
+    self.titleLabel.text = title;
+    [self.titleLabel sizeToFit];
+    [self setNeedsLayout];
+}
+
+#pragma mark Overrides
+
+- (void)prepareForReuse {
+    [super prepareForReuse];
+    [self updateAppearance];
+}
+
+- (void)installConstraints {
+    CGFloat stripeHeight = 2;
+
+    self.titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
+    self.selectionIndicatorStripe.translatesAutoresizingMaskIntoConstraints = NO;
+
+    UIView *superview = self.contentView;
+    [self.titleLabel pinEdgesToSuperviewWithInsets:UIEdgeInsetsMake(10, 15, 8 + stripeHeight, 15)];
+
+    [self.selectionIndicatorStripe.leadingAnchor constraintEqualToAnchor:superview.leadingAnchor].active = YES;
+    [self.selectionIndicatorStripe.bottomAnchor constraintEqualToAnchor:superview.bottomAnchor].active = YES;
+    [self.selectionIndicatorStripe.trailingAnchor constraintEqualToAnchor:superview.trailingAnchor].active = YES;
+    [self.selectionIndicatorStripe.heightAnchor constraintEqualToConstant:stripeHeight].active = YES;
+}
+
+- (void)setSelected:(BOOL)selected {
+    super.selected = selected;
+    [self updateAppearance];
+}
+
+@end

Classes/Core/FLEXScopeCarousel.h

@@ -0,0 +1,20 @@
+//
+//  FLEXScopeCarousel.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/17/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+/// Only use on iOS 10 and up. Requires iOS 10 APIs for calculating row sizes.
+@interface FLEXScopeCarousel : UIControl
+
+@property (nonatomic, copy) NSArray<NSString *> *items;
+@property (nonatomic) NSInteger selectedIndex;
+@property (nonatomic) void(^selectedIndexChangedAction)(NSInteger idx);
+
+- (void)registerBlockForDynamicTypeChanges:(void(^)(FLEXScopeCarousel *))handler;
+
+@end

Classes/Core/FLEXScopeCarousel.m

@@ -0,0 +1,207 @@
+//
+//  FLEXScopeCarousel.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/17/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXScopeCarousel.h"
+#import "FLEXCarouselCell.h"
+#import "FLEXColor.h"
+#import "UIView+FLEX_Layout.h"
+
+const CGFloat kCarouselItemSpacing = 0;
+NSString * const kCarouselCellReuseIdentifier = @"kCarouselCellReuseIdentifier";
+
+@interface FLEXScopeCarousel () <UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
+@property (nonatomic, readonly) UICollectionView *collectionView;
+@property (nonatomic, readonly) FLEXCarouselCell *sizingCell;
+@property (nonatomic, readonly) NSLayoutConstraint *heightConstraint;
+
+@property (nonatomic, readonly) id dynamicTypeObserver;
+@property (nonatomic, readonly) NSMutableArray *dynamicTypeHandlers;
+
+@property (nonatomic) BOOL constraintsInstalled;
+@end
+
+@implementation FLEXScopeCarousel
+
+- (id)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        self.backgroundColor = [FLEXColor primaryBackgroundColor];
+        self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
+        _dynamicTypeHandlers = [NSMutableArray new];
+        
+        CGSize itemSize = CGSizeZero;
+        if (@available(iOS 10.0, *)) {
+            itemSize = UICollectionViewFlowLayoutAutomaticSize;
+        }
+
+        // Collection view layout
+        UICollectionViewFlowLayout *layout = ({
+            UICollectionViewFlowLayout *layout = [UICollectionViewFlowLayout new];
+            layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
+            layout.sectionInset = UIEdgeInsetsZero;
+            layout.minimumLineSpacing = kCarouselItemSpacing;
+            layout.itemSize = itemSize;
+            layout.estimatedItemSize = itemSize;
+            layout;
+        });
+
+        // Collection view
+        _collectionView = ({
+            UICollectionView *cv = [[UICollectionView alloc]
+                initWithFrame:CGRectZero
+                collectionViewLayout:layout
+            ];
+            cv.showsHorizontalScrollIndicator = NO;
+            cv.backgroundColor = UIColor.clearColor;
+            cv.delegate = self;
+            cv.dataSource = self;
+            [cv registerClass:[FLEXCarouselCell class] forCellWithReuseIdentifier:kCarouselCellReuseIdentifier];
+
+            [self addSubview:cv];
+            cv;
+        });
+
+
+        // Sizing cell
+        _sizingCell = [FLEXCarouselCell new];
+        self.sizingCell.title = @"NSObject";
+
+        // Dynamic type
+        __weak __typeof(self) weakSelf = self;
+        _dynamicTypeObserver = [NSNotificationCenter.defaultCenter
+            addObserverForName:UIContentSizeCategoryDidChangeNotification
+            object:nil queue:nil usingBlock:^(NSNotification *note) {
+                [self.collectionView setNeedsLayout];
+                [self setNeedsUpdateConstraints];
+
+                // Notify observers
+                __typeof(self) self = weakSelf;
+                for (void (^block)(FLEXScopeCarousel *) in self.dynamicTypeHandlers) {
+                    block(self);
+                }
+            }
+        ];
+    }
+
+    return self;
+}
+
+- (void)dealloc {
+    [NSNotificationCenter.defaultCenter removeObserver:self.dynamicTypeObserver];
+}
+
+#pragma mark - Overrides
+
+- (void)drawRect:(CGRect)rect {
+    [super drawRect:rect];
+
+    CGFloat width = 1.f / UIScreen.mainScreen.scale;
+
+    // Draw hairline
+    CGContextRef context = UIGraphicsGetCurrentContext();
+    CGContextSetStrokeColorWithColor(context, [FLEXColor hairlineColor].CGColor);
+    CGContextSetLineWidth(context, width);
+    CGContextMoveToPoint(context, 0, rect.size.height - width);
+    CGContextAddLineToPoint(context, rect.size.width, rect.size.height - width);
+    CGContextStrokePath(context);
+}
+
++ (BOOL)requiresConstraintBasedLayout {
+    return YES;
+}
+
+- (void)updateConstraints {
+    if (!self.constraintsInstalled) {
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        self.collectionView.translatesAutoresizingMaskIntoConstraints = NO;
+
+        [self.centerXAnchor constraintEqualToAnchor:self.superview.centerXAnchor].active = YES;
+        [self.widthAnchor constraintEqualToAnchor:self.superview.widthAnchor].active = YES;
+        [self.topAnchor constraintEqualToAnchor:self.superview.topAnchor].active = YES;
+
+        [self.collectionView pinEdgesToSuperview];
+        _heightConstraint = [self.heightAnchor constraintEqualToConstant:100];
+        self.heightConstraint.active = YES;
+
+        self.constraintsInstalled = YES;
+    }
+
+    self.heightConstraint.constant = [self.sizingCell systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;
+    
+    [super updateConstraints];
+}
+
+#pragma mark - Public
+
+- (void)setItems:(NSArray<NSString *> *)items {
+    NSParameterAssert(items.count);
+
+    _items = items.copy;
+
+    // Refresh list, select first item initially
+    [self.collectionView reloadData];
+    self.selectedIndex = 0;
+}
+
+- (void)setSelectedIndex:(NSInteger)idx {
+    NSParameterAssert(idx < self.items.count);
+
+    _selectedIndex = idx;
+    NSIndexPath *path = [NSIndexPath indexPathForItem:idx inSection:0];
+    [self.collectionView selectItemAtIndexPath:path
+                                      animated:YES
+                                scrollPosition:UICollectionViewScrollPositionCenteredHorizontally];
+    [self collectionView:self.collectionView didSelectItemAtIndexPath:path];
+}
+
+- (void)registerBlockForDynamicTypeChanges:(void (^)(FLEXScopeCarousel *))handler {
+    [self.dynamicTypeHandlers addObject:handler];
+}
+
+#pragma mark - UICollectionView
+
+- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
+//    if (@available(iOS 10.0, *)) {
+//        return UICollectionViewFlowLayoutAutomaticSize;
+//    }
+    
+    self.sizingCell.title = self.items[indexPath.item];
+    return [self.sizingCell systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
+}
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
+    return self.items.count;
+}
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
+                  cellForItemAtIndexPath:(NSIndexPath *)indexPath {
+    FLEXCarouselCell *cell = (id)[collectionView dequeueReusableCellWithReuseIdentifier:kCarouselCellReuseIdentifier
+                                                                           forIndexPath:indexPath];
+    cell.title = self.items[indexPath.row];
+    return cell;
+}
+
+- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
+    _selectedIndex = indexPath.item; // In case self.selectedIndex didn't trigger this call
+
+    if (self.selectedIndexChangedAction) {
+        self.selectedIndexChangedAction(indexPath.row);
+    }
+
+    // TODO: dynamically choose a scroll position. Very wide items should
+    // get "Left" while smaller items should not scroll at all, unless
+    // they are only partially on the screen, in which case they
+    // should get "HorizontallyCentered" to bring them onto the screen.
+    // For now, everything goes to the left, as this has a similar effect.
+    [collectionView scrollToItemAtIndexPath:indexPath
+                           atScrollPosition:UICollectionViewScrollPositionLeft
+                                   animated:YES];
+    [self sendActionsForControlEvents:UIControlEventValueChanged];
+}
+
+@end

Classes/Core/FLEXTableViewController.h

@@ -0,0 +1,96 @@
+//
+//  FLEXTableViewController.h
+//  FLEX
+//
+//  Created by Tanner on 7/5/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+@class FLEXScopeCarousel;
+
+typedef CGFloat FLEXDebounceInterval;
+/// No delay, all events delivered
+extern CGFloat const kFLEXDebounceInstant;
+/// Small delay which makes UI seem smoother by avoiding rapid events
+extern CGFloat const kFLEXDebounceFast;
+/// Slower than Fast, faster than ExpensiveIO
+extern CGFloat const kFLEXDebounceForAsyncSearch;
+/// The least frequent, at just over once per second; for I/O or other expensive operations
+extern CGFloat const kFLEXDebounceForExpensiveIO;
+
+@interface FLEXTableViewController : UITableViewController <UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate>
+
+/// A grouped table view. Inset on iOS 13.
+/// 
+/// Simply calls into initWithStyle:
+- (id)init;
+
+/// Defaults to NO.
+///
+/// Setting this to YES will initialize the carousel and the view.
+@property (nonatomic) BOOL showsCarousel;
+/// A horizontally scrolling list with functionality similar to
+/// that of a search bar's scope bar. You'd want to use this when
+/// you have potentially more than 4 scope options.
+@property (nonatomic) FLEXScopeCarousel *carousel;
+
+/// Defaults to NO.
+/// 
+/// Setting this to YES will initialize searchController and the view.
+@property (nonatomic) BOOL showsSearchBar;
+/// Defaults to NO.
+///
+/// Setting this to YES will make the search bar appear whenever the view appears.
+/// Otherwise, iOS will only show the search bar when you scroll up.
+@property (nonatomic) BOOL showSearchBarInitially;
+
+/// nil unless showsSearchBar is set to YES.
+/// 
+/// self is used as the default search results updater and delegate.
+/// Make sure your subclass conforms to UISearchControllerDelegate.
+/// The search bar will not dim the background or hide the navigation bar by default.
+/// On iOS 11 and up, the search bar will appear in the navigation bar below the title.
+@property (nonatomic) UISearchController *searchController;
+/// Used to initialize the search controller. Defaults to nil.
+@property (nonatomic) UIViewController *searchResultsController;
+/// Defaults to "Fast"
+/// 
+/// Determines how often search bar results will be "debounced."
+/// Empty query events are always sent instantly. Query events will
+/// be sent when the user has not changed the query for this interval.
+@property (nonatomic) FLEXDebounceInterval searchBarDebounceInterval;
+/// Whether the search bar stays at the top of the view while scrolling.
+/// 
+/// Calls into self.navigationItem.hidesSearchBarWhenScrolling.
+/// Do not change self.navigationItem.hidesSearchBarWhenScrolling directly,
+/// or it will not be respsected. Use this instead.
+/// Defaults to NO.
+@property (nonatomic) BOOL pinSearchBar;
+/// By default, we will show the search bar's cancel button when 
+/// search becomes active and hide it when search is dismissed.
+/// 
+/// Do not set the showsCancelButton property on the searchController's
+/// searchBar manually. Set this property after turning on showsSearchBar.
+///
+/// Does nothing pre-iOS 13, safe to call on any version.
+@property (nonatomic) BOOL automaticallyShowsSearchBarCancelButton;
+
+/// If using the scope bar, self.searchController.searchBar.selectedScopeButtonIndex.
+/// Otherwise, this is the selected index of the carousel, or NSNotFound if using neither.
+@property (nonatomic, readonly) NSInteger selectedScope;
+/// self.searchController.searchBar.text
+@property (nonatomic, readonly) NSString *searchText;
+
+/// Subclasses should override to handle search query update events.
+/// 
+/// searchBarDebounceInterval is used to reduce the frequency at which this method is called.
+/// This method is also called when the search bar becomes the first responder,
+/// and when the selected search bar scope index changes.
+- (void)updateSearchResults:(NSString *)newText;
+
+/// Convenient for doing some async processor-intensive searching
+/// in the background before updating the UI back on the main queue.
+- (void)onBackgroundQueue:(NSArray *(^)(void))backgroundBlock thenOnMainQueue:(void(^)(NSArray *))mainBlock;
+
+@end

Classes/Core/FLEXTableViewController.m

@@ -0,0 +1,285 @@
+//
+//  FLEXTableViewController.m
+//  FLEX
+//
+//  Created by Tanner on 7/5/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+#import "FLEXScopeCarousel.h"
+#import "FLEXTableView.h"
+#import "FLEXUtility.h"
+#import <objc/runtime.h>
+
+@interface Block : NSObject
+- (void)invoke;
+@end
+
+CGFloat const kFLEXDebounceInstant = 0.f;
+CGFloat const kFLEXDebounceFast = 0.05;
+CGFloat const kFLEXDebounceForAsyncSearch = 0.15;
+CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
+
+@interface FLEXTableViewController ()
+@property (nonatomic) NSTimer *debounceTimer;
+@property (nonatomic) BOOL didInitiallyRevealSearchBar;
+@end
+
+@implementation FLEXTableViewController
+@synthesize automaticallyShowsSearchBarCancelButton = _automaticallyShowsSearchBarCancelButton;
+
+#pragma mark - Public
+
+- (id)init {
+#if FLEX_AT_LEAST_IOS13_SDK
+    if (@available(iOS 13.0, *)) {
+        self = [self initWithStyle:UITableViewStyleInsetGrouped];
+    } else {
+        self = [self initWithStyle:UITableViewStyleGrouped];
+    }
+#else
+    self = [self initWithStyle:UITableViewStyleGrouped];
+#endif
+    return self;
+}
+
+- (id)initWithStyle:(UITableViewStyle)style {
+    self = [super initWithStyle:style];
+    
+    if (self) {
+        _searchBarDebounceInterval = kFLEXDebounceFast;
+        _showSearchBarInitially = YES;
+    }
+    
+    return self;
+}
+
+- (void)setShowsSearchBar:(BOOL)showsSearchBar {
+    if (_showsSearchBar == showsSearchBar) return;
+    _showsSearchBar = showsSearchBar;
+    
+    UIViewController *results = self.searchResultsController;
+    self.searchController = [[UISearchController alloc] initWithSearchResultsController:results];
+    self.searchController.searchBar.placeholder = @"Filter";
+    self.searchController.searchResultsUpdater = (id)self;
+    self.searchController.delegate = (id)self;
+    self.searchController.dimsBackgroundDuringPresentation = NO;
+    self.searchController.hidesNavigationBarDuringPresentation = NO;
+    /// Not necessary in iOS 13; remove this when iOS 13 is the minimum deployment target
+    self.searchController.searchBar.delegate = self;
+
+    self.automaticallyShowsSearchBarCancelButton = YES;
+
+#if FLEX_AT_LEAST_IOS13_SDK
+    if (@available(iOS 13, *)) {
+        self.searchController.automaticallyShowsScopeBar = NO;
+    }
+#endif
+    
+    if (@available(iOS 11.0, *)) {
+        self.navigationItem.searchController = self.searchController;
+    } else {
+        self.tableView.tableHeaderView = self.searchController.searchBar;
+    }
+}
+
+- (void)setShowsCarousel:(BOOL)showsCarousel {
+    if (_showsCarousel == showsCarousel) return;
+    _showsCarousel = showsCarousel;
+
+    _carousel = ({
+        __weak __typeof(self) weakSelf = self;
+
+        FLEXScopeCarousel *carousel = [FLEXScopeCarousel new];
+        carousel.selectedIndexChangedAction = ^(NSInteger idx) {
+            __typeof(self) self = weakSelf;
+            [self updateSearchResults:self.searchText];
+        };
+
+        self.tableView.tableHeaderView = carousel;
+        [self.tableView layoutIfNeeded];
+        // UITableView won't update the header size unless you reset the header view
+        [carousel registerBlockForDynamicTypeChanges:^(FLEXScopeCarousel *carousel) {
+            __typeof(self) self = weakSelf;
+            self.tableView.tableHeaderView = carousel;
+            [self.tableView layoutIfNeeded];
+        }];
+
+        carousel;
+    });
+}
+
+- (NSInteger)selectedScope {
+    if (self.searchController.searchBar.showsScopeBar) {
+        return self.searchController.searchBar.selectedScopeButtonIndex;
+    } else if (self.showsCarousel) {
+        return self.carousel.selectedIndex;
+    } else {
+        return NSNotFound;
+    }
+}
+
+- (NSString *)searchText {
+    return self.searchController.searchBar.text;
+}
+
+- (BOOL)automaticallyShowsSearchBarCancelButton {
+#if FLEX_AT_LEAST_IOS13_SDK
+    if (@available(iOS 13, *)) {
+        return self.searchController.automaticallyShowsCancelButton;
+    }
+#endif
+
+    return _automaticallyShowsSearchBarCancelButton;
+}
+
+- (void)setAutomaticallyShowsSearchBarCancelButton:(BOOL)value {
+#if FLEX_AT_LEAST_IOS13_SDK
+    if (@available(iOS 13, *)) {
+        self.searchController.automaticallyShowsCancelButton = value;
+    }
+#endif
+
+    _automaticallyShowsSearchBarCancelButton = value;
+}
+
+- (void)updateSearchResults:(NSString *)newText { }
+
+- (void)onBackgroundQueue:(NSArray *(^)(void))backgroundBlock thenOnMainQueue:(void(^)(NSArray *))mainBlock {
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSArray *items = backgroundBlock();
+        dispatch_async(dispatch_get_main_queue(), ^{
+            mainBlock(items);
+        });
+    });
+}
+
+#pragma mark - View Controller Lifecycle
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
+
+    // On iOS 13, the root view controller shows it's search bar no matter what.
+    // Turning this off avoids some weird flash the navigation bar does when we
+    // toggle navigationItem.hidesSearchBarWhenScrolling on and off. The flash
+    // will still happen on subsequent view controllers, but we can at least
+    // avoid it for the root view controller
+    if (@available(iOS 13, *)) {
+        if (self.navigationController.viewControllers.firstObject == self) {
+            _showSearchBarInitially = NO;
+        }
+    }
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+    [super viewWillAppear:animated];
+    
+    // When going back, make the search bar reappear instead of hiding
+    if (@available(iOS 11.0, *)) {
+        if ((self.pinSearchBar || self.showSearchBarInitially) && !self.didInitiallyRevealSearchBar) {
+            self.navigationItem.hidesSearchBarWhenScrolling = NO;
+        }
+    }
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+    [super viewDidAppear:animated];
+
+    // Allow scrolling to collapse the search bar, only if we don't want it pinned
+    if (@available(iOS 11.0, *)) {
+        if (self.showSearchBarInitially && !self.pinSearchBar && !self.didInitiallyRevealSearchBar) {
+            // All this mumbo jumbo is necessary to work around a bug in iOS 13 up to 13.2
+            // wherein quickly toggling navigationItem.hidesSearchBarWhenScrolling to make
+            // the search bar appear initially results in a bugged search bar that
+            // becomes transparent and floats over the screen as you scroll
+            [UIView animateWithDuration:0.2 animations:^{
+                self.navigationItem.hidesSearchBarWhenScrolling = YES;
+                [self.navigationController.view setNeedsLayout];
+                [self.navigationController.view layoutIfNeeded];
+            }];
+        }
+    }
+
+    // We only want to reveal the search bar when the view controller first appears.
+    self.didInitiallyRevealSearchBar = YES;
+}
+
+- (void)willMoveToParentViewController:(UIViewController *)parent {
+    [super willMoveToParentViewController:parent];
+    // Reset this since we are re-appearing under a new
+    // parent view controller and need to show it again
+    self.didInitiallyRevealSearchBar = NO;
+}
+
+#pragma mark - Private
+
+- (void)debounce:(void(^)(void))block {
+    [self.debounceTimer invalidate];
+    
+    self.debounceTimer = [NSTimer
+        scheduledTimerWithTimeInterval:self.searchBarDebounceInterval
+        target:block
+        selector:@selector(invoke)
+        userInfo:nil
+        repeats:NO
+    ];
+}
+
+#pragma mark - Search Bar
+
+#pragma mark UISearchResultsUpdating
+
+- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
+{
+    [self.debounceTimer invalidate];
+    NSString *text = searchController.searchBar.text;
+    
+    // Only debounce if we want to, and if we have a non-empty string
+    // Empty string events are sent instantly
+    if (text.length && self.searchBarDebounceInterval > kFLEXDebounceInstant) {
+        [self debounce:^{
+            [self updateSearchResults:text];
+        }];
+    } else {
+        [self updateSearchResults:text];
+    }
+}
+
+#pragma mark UISearchControllerDelegate
+
+- (void)willPresentSearchController:(UISearchController *)searchController {
+    // Manually show cancel button for < iOS 13
+    if (!@available(iOS 13, *) && self.automaticallyShowsSearchBarCancelButton) {
+        [searchController.searchBar setShowsCancelButton:YES animated:YES];
+    }
+}
+
+- (void)willDismissSearchController:(UISearchController *)searchController {
+    // Manually hide cancel button for < iOS 13
+    if (!@available(iOS 13, *) && self.automaticallyShowsSearchBarCancelButton) {
+        [searchController.searchBar setShowsCancelButton:NO animated:YES];
+    }
+}
+
+#pragma mark UISearchBarDelegate
+
+/// Not necessary in iOS 13; remove this when iOS 13 is the deployment target
+- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {
+    [self updateSearchResultsForSearchController:self.searchController];
+}
+
+#pragma mark Table view
+
+/// Not having a title in the first section looks weird with a rounded-corner table view style
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    if (@available(iOS 13, *)) {
+        return @" "; // For inset grouped style
+    }
+
+    return nil; // For plain/gropued style
+}
+
+@end

Classes/Core/FLEXTableViewSection.h

@@ -0,0 +1,39 @@
+//
+//  FLEXTableViewSection.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/11/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A protocol for arbitrary case-insensitive pattern matching
+@protocol FLEXPatternMatching <NSObject>
+/// @return YES if the receiver matches the query, case-insensitive
+- (BOOL)matches:(NSString *)query;
+@end
+
+@interface FLEXTableViewSection<__covariant ObjectType> : NSObject
+
++ (instancetype)section:(NSInteger)section title:(NSString *)title rows:(NSArray<ObjectType<FLEXPatternMatching>> *)rows;
+
+@property (nonatomic, readonly) NSInteger section;
+@property (nonatomic, readonly) NSString *title;
+@property (nonatomic, readonly) NSArray<ObjectType<FLEXPatternMatching>> *rows;
+
+@property (nonatomic, readonly) NSInteger count;
+
+/// @return A new section containing only rows that match the string,
+/// or nil if the section was empty and no rows matched the string.
+- (nullable instancetype)newSectionWithRowsMatchingQuery:(NSString *)query;
+
+@end
+
+@interface FLEXTableViewSection<__covariant ObjectType> (Subscripting)
+- (ObjectType)objectAtIndexedSubscript:(NSUInteger)idx;
+@end
+
+NS_ASSUME_NONNULL_END

Classes/Core/FLEXTableViewSection.m

@@ -0,0 +1,49 @@
+//
+//  FLEXTableViewSection.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/11/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXTableViewSection.h"
+
+@implementation FLEXTableViewSection
+
++ (instancetype)section:(NSInteger)section title:(NSString *)title rows:(NSArray *)rows {
+    FLEXTableViewSection *s = [self new];
+    s->_section = section;
+    s->_title = title;
+    s->_rows = rows.copy;
+
+    return s;
+}
+
+- (instancetype)newSectionWithRowsMatchingQuery:(NSString *)query {
+    // Find rows containing the search string
+    NSPredicate *containsString = [NSPredicate predicateWithBlock:^BOOL(id<FLEXPatternMatching> obj, NSDictionary *bindings) {
+        return [obj matches:query];
+    }];
+    NSArray *filteredRows = [self.rows filteredArrayUsingPredicate:containsString];
+    
+    // Only return new section if not empty
+    if (filteredRows.count) {
+        return [[self class] section:self.section title:self.title rows:filteredRows];
+    }
+    
+    return nil;
+}
+
+- (NSInteger)count {
+    return self.rows.count;
+}
+
+@end
+
+@implementation FLEXTableViewSection (Subscripting)
+
+- (id)objectAtIndexedSubscript:(NSUInteger)idx {
+    return self.rows[idx];
+}
+
+@end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputColorView.m

@@ -14,8 +14,8 @@
 
 @interface FLEXColorComponentInputView : UIView
 
-@property (nonatomic, strong) UISlider *slider;
-@property (nonatomic, strong) UILabel *valueLabel;
+@property (nonatomic) UISlider *slider;
+@property (nonatomic) UILabel *valueLabel;
 
 @property (nonatomic, weak) id <FLEXColorComponentInputViewDelegate> delegate;
 
@@ -34,12 +34,12 @@
 {
     self = [super initWithFrame:frame];
     if (self) {
-        self.slider = [[UISlider alloc] init];
+        self.slider = [UISlider new];
         self.slider.backgroundColor = self.backgroundColor;
         [self.slider addTarget:self action:@selector(sliderChanged:) forControlEvents:UIControlEventValueChanged];
         [self addSubview:self.slider];
         
-        self.valueLabel = [[UILabel alloc] init];
+        self.valueLabel = [UILabel new];
         self.valueLabel.backgroundColor = self.backgroundColor;
         self.valueLabel.font = [FLEXUtility defaultFontOfSize:14.0];
         self.valueLabel.textAlignment = NSTextAlignmentRight;
@@ -94,9 +94,9 @@
 
 @interface FLEXColorPreviewBox : UIView
 
-@property (nonatomic, strong) UIColor *color;
+@property (nonatomic) UIColor *color;
 
-@property (nonatomic, strong) UIView *colorOverlayView;
+@property (nonatomic) UIView *colorOverlayView;
 
 @end
 
@@ -107,12 +107,12 @@
     self = [super initWithFrame:frame];
     if (self) {
         self.layer.borderWidth = 1.0;
-        self.layer.borderColor = [[UIColor blackColor] CGColor];
+        self.layer.borderColor = UIColor.blackColor.CGColor;
         self.backgroundColor = [UIColor colorWithPatternImage:[[self class] backgroundPatternImage]];
         
         self.colorOverlayView = [[UIView alloc] initWithFrame:self.bounds];
         self.colorOverlayView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
-        self.colorOverlayView.backgroundColor = [UIColor clearColor];
+        self.colorOverlayView.backgroundColor = UIColor.clearColor;
         [self addSubview:self.colorOverlayView];
     }
     return self;
@@ -134,12 +134,12 @@
     CGSize squareSize = CGSizeMake(kSquareDimension, kSquareDimension);
     CGSize imageSize = CGSizeMake(2.0 * kSquareDimension, 2.0 * kSquareDimension);
     
-    UIGraphicsBeginImageContextWithOptions(imageSize, YES, [[UIScreen mainScreen] scale]);
+    UIGraphicsBeginImageContextWithOptions(imageSize, YES, UIScreen.mainScreen.scale);
     
-    [[UIColor whiteColor] setFill];
+    [UIColor.whiteColor setFill];
     UIRectFill(CGRectMake(0, 0, imageSize.width, imageSize.height));
     
-    [[UIColor grayColor] setFill];
+    [UIColor.grayColor setFill];
     UIRectFill(CGRectMake(squareSize.width, 0, squareSize.width, squareSize.height));
     UIRectFill(CGRectMake(0, squareSize.height, squareSize.width, squareSize.height));
     
@@ -153,12 +153,12 @@
 
 @interface FLEXArgumentInputColorView () <FLEXColorComponentInputViewDelegate>
 
-@property (nonatomic, strong) FLEXColorPreviewBox *colorPreviewBox;
-@property (nonatomic, strong) UILabel *hexLabel;
-@property (nonatomic, strong) FLEXColorComponentInputView *alphaInput;
-@property (nonatomic, strong) FLEXColorComponentInputView *redInput;
-@property (nonatomic, strong) FLEXColorComponentInputView *greenInput;
-@property (nonatomic, strong) FLEXColorComponentInputView *blueInput;
+@property (nonatomic) FLEXColorPreviewBox *colorPreviewBox;
+@property (nonatomic) UILabel *hexLabel;
+@property (nonatomic) FLEXColorComponentInputView *alphaInput;
+@property (nonatomic) FLEXColorComponentInputView *redInput;
+@property (nonatomic) FLEXColorComponentInputView *greenInput;
+@property (nonatomic) FLEXColorComponentInputView *blueInput;
 
 @end
 
@@ -168,32 +168,32 @@
 {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        self.colorPreviewBox = [[FLEXColorPreviewBox alloc] init];
+        self.colorPreviewBox = [FLEXColorPreviewBox new];
         [self addSubview:self.colorPreviewBox];
         
-        self.hexLabel = [[UILabel alloc] init];
+        self.hexLabel = [UILabel new];
         self.hexLabel.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.9];
         self.hexLabel.textAlignment = NSTextAlignmentCenter;
         self.hexLabel.font = [FLEXUtility defaultFontOfSize:12.0];
         [self addSubview:self.hexLabel];
         
-        self.alphaInput = [[FLEXColorComponentInputView alloc] init];
-        self.alphaInput.slider.minimumTrackTintColor = [UIColor blackColor];
+        self.alphaInput = [FLEXColorComponentInputView new];
+        self.alphaInput.slider.minimumTrackTintColor = UIColor.blackColor;
         self.alphaInput.delegate = self;
         [self addSubview:self.alphaInput];
         
-        self.redInput = [[FLEXColorComponentInputView alloc] init];
-        self.redInput.slider.minimumTrackTintColor = [UIColor redColor];
+        self.redInput = [FLEXColorComponentInputView new];
+        self.redInput.slider.minimumTrackTintColor = UIColor.redColor;
         self.redInput.delegate = self;
         [self addSubview:self.redInput];
         
-        self.greenInput = [[FLEXColorComponentInputView alloc] init];
-        self.greenInput.slider.minimumTrackTintColor = [UIColor greenColor];
+        self.greenInput = [FLEXColorComponentInputView new];
+        self.greenInput.slider.minimumTrackTintColor = UIColor.greenColor;
         self.greenInput.delegate = self;
         [self addSubview:self.greenInput];
         
-        self.blueInput = [[FLEXColorComponentInputView alloc] init];
-        self.blueInput.slider.minimumTrackTintColor = [UIColor blueColor];
+        self.blueInput = [FLEXColorComponentInputView new];
+        self.blueInput.slider.minimumTrackTintColor = UIColor.blueColor;
         self.blueInput.delegate = self;
         [self addSubview:self.blueInput];
     }
@@ -221,14 +221,14 @@
     
     [self.hexLabel sizeToFit];
     const CGFloat kLabelVerticalOutsetAmount = 0.0;
-    const CGFloat kLabelHorizonalOutsetAmount = 2.0;
-    UIEdgeInsets labelOutset = UIEdgeInsetsMake(-kLabelVerticalOutsetAmount, -kLabelHorizonalOutsetAmount, -kLabelVerticalOutsetAmount, -kLabelHorizonalOutsetAmount);
+    const CGFloat kLabelHorizontalOutsetAmount = 2.0;
+    UIEdgeInsets labelOutset = UIEdgeInsetsMake(-kLabelVerticalOutsetAmount, -kLabelHorizontalOutsetAmount, -kLabelVerticalOutsetAmount, -kLabelHorizontalOutsetAmount);
     self.hexLabel.frame = UIEdgeInsetsInsetRect(self.hexLabel.frame, labelOutset);
     CGFloat hexLabelOriginX = self.colorPreviewBox.layer.borderWidth;
     CGFloat hexLabelOriginY = CGRectGetMaxY(self.colorPreviewBox.frame) - self.colorPreviewBox.layer.borderWidth - self.hexLabel.frame.size.height;
     self.hexLabel.frame = CGRectMake(hexLabelOriginX, hexLabelOriginY, self.hexLabel.frame.size.width, self.hexLabel.frame.size.height);
     
-    NSArray *colorComponentInputViews = @[self.alphaInput, self.redInput, self.greenInput, self.blueInput];
+    NSArray<FLEXColorComponentInputView *> *colorComponentInputViews = @[self.alphaInput, self.redInput, self.greenInput, self.blueInput];
     for (FLEXColorComponentInputView *inputView in colorComponentInputViews) {
         CGSize fitSize = [inputView sizeThatFits:constrainSize];
         inputView.frame = CGRectMake(0, runningOriginY, fitSize.width, fitSize.height);

Classes/Editing/ArgumentInputViews/FLEXArgumentInputDateView.m

@@ -11,7 +11,7 @@
 
 @interface FLEXArgumentInputDateView ()
 
-@property (nonatomic, strong) UIDatePicker *datePicker;
+@property (nonatomic) UIDatePicker *datePicker;
 
 @end
 
@@ -21,7 +21,7 @@
 {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        self.datePicker = [[UIDatePicker alloc] init];
+        self.datePicker = [UIDatePicker new];
         self.datePicker.datePickerMode = UIDatePickerModeDateAndTime;
         // Using UTC, because that's what the NSDate description prints
         self.datePicker.calendar = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontView.m

@@ -13,8 +13,8 @@
 
 @interface FLEXArgumentInputFontView ()
 
-@property (nonatomic, strong) FLEXArgumentInputView *fontNameInput;
-@property (nonatomic, strong) FLEXArgumentInputView *pointSizeInput;
+@property (nonatomic) FLEXArgumentInputView *fontNameInput;
+@property (nonatomic) FLEXArgumentInputView *pointSizeInput;
 
 @end
 

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontsPickerView.h

@@ -1,6 +1,6 @@
 //
 //  FLEXArgumentInputFontsPickerView.h
-//  UICatalog
+//  FLEX
 //
 //  Created by 啟倫 陳 on 2014/7/27.
 //  Copyright (c) 2014年 f. All rights reserved.

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontsPickerView.m

@@ -1,6 +1,6 @@
 //
 //  FLEXArgumentInputFontsPickerView.m
-//  UICatalog
+//  FLEX
 //
 //  Created by 啟倫 陳 on 2014/7/27.
 //  Copyright (c) 2014年 f. All rights reserved.
@@ -11,7 +11,7 @@
 
 @interface FLEXArgumentInputFontsPickerView ()
 
-@property (nonatomic, strong) NSMutableArray *availableFonts;
+@property (nonatomic) NSMutableArray<NSString *> *availableFonts;
 
 @end
 
@@ -35,12 +35,12 @@
     if ([self.availableFonts indexOfObject:inputValue] == NSNotFound) {
         [self.availableFonts insertObject:inputValue atIndex:0];
     }
-    [(UIPickerView*)self.inputTextView.inputView selectRow:[self.availableFonts indexOfObject:inputValue] inComponent:0 animated:NO];
+    [(UIPickerView *)self.inputTextView.inputView selectRow:[self.availableFonts indexOfObject:inputValue] inComponent:0 animated:NO];
 }
 
 - (id)inputValue
 {
-    return [self.inputTextView.text length] > 0 ? [self.inputTextView.text copy] : nil;
+    return self.inputTextView.text.length > 0 ? [self.inputTextView.text copy] : nil;
 }
 
 #pragma mark - private
@@ -56,7 +56,7 @@
 
 - (void)createAvailableFonts
 {
-    NSMutableArray *unsortedFontsArray = [NSMutableArray array];
+    NSMutableArray<NSString *> *unsortedFontsArray = [NSMutableArray array];
     for (NSString *eachFontFamily in [UIFont familyNames]) {
         for (NSString *eachFontName in [UIFont fontNamesForFamilyName:eachFontFamily]) {
             [unsortedFontsArray addObject:eachFontName];
@@ -74,7 +74,7 @@
 
 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
 {
-    return [self.availableFonts count];
+    return self.availableFonts.count;
 }
 
 #pragma mark - UIPickerViewDelegate
@@ -84,13 +84,13 @@
     UILabel *fontLabel;
     if (!view) {
         fontLabel = [UILabel new];
-        fontLabel.backgroundColor = [UIColor clearColor];
+        fontLabel.backgroundColor = UIColor.clearColor;
         fontLabel.textAlignment = NSTextAlignmentCenter;
     } else {
         fontLabel = (UILabel*)view;
     }
     UIFont *font = [UIFont fontWithName:self.availableFonts[row] size:15.0];
-    NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
+    NSDictionary<NSString *, id> *attributesDictionary = [NSDictionary<NSString *, id> dictionaryWithObject:font forKey:NSFontAttributeName];
     NSAttributedString *attributesString = [[NSAttributedString alloc] initWithString:self.availableFonts[row] attributes:attributesDictionary];
     fontLabel.attributedText = attributesString;
     [fontLabel sizeToFit];

Classes/Editing/ArgumentInputViews/FLEXArgumentInputJSONObjectView.m

@@ -1,65 +0,0 @@
-//
-//  FLEXArgumentInputJSONObjectView.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 6/15/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import "FLEXArgumentInputJSONObjectView.h"
-#import "FLEXRuntimeUtility.h"
-
-@implementation FLEXArgumentInputJSONObjectView
-
-- (instancetype)initWithArgumentTypeEncoding:(const char *)typeEncoding
-{
-    self = [super initWithArgumentTypeEncoding:typeEncoding];
-    if (self) {
-        // Start with the numbers and punctuation keyboard since quotes, curly braces, or
-        // square brackets are likely to be the first characters type for the JSON.
-        self.inputTextView.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
-        self.targetSize = FLEXArgumentInputViewSizeLarge;
-    }
-    return self;
-}
-
-- (void)setInputValue:(id)inputValue
-{
-    self.inputTextView.text = [FLEXRuntimeUtility editableJSONStringForObject:inputValue];
-}
-
-- (id)inputValue
-{
-    return [FLEXRuntimeUtility objectValueFromEditableJSONString:self.inputTextView.text];
-}
-
-+ (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
-{
-    // Must be object type.
-    BOOL supported = type && type[0] == '@';
-    
-    if (supported) {
-        if (value) {
-            // If there's a current value, it must be serializable to JSON
-            supported = [FLEXRuntimeUtility editableJSONStringForObject:value] != nil;
-        } else {
-            // Otherwise, see if we have more type information than just 'id'.
-            // If we do, make sure the encoding is something serializable to JSON.
-            // Properties and ivars keep more detailed type encoding information than method arguments.
-            if (strcmp(type, @encode(id)) != 0) {
-                BOOL isJSONSerializableType = NO;
-                // Note: we can't use @encode(NSString) here because that drops the string information and just goes to @encode(id).
-                isJSONSerializableType = isJSONSerializableType || strcmp(type, FLEXEncodeClass(NSString)) == 0;
-                isJSONSerializableType = isJSONSerializableType || strcmp(type, FLEXEncodeClass(NSNumber)) == 0;
-                isJSONSerializableType = isJSONSerializableType || strcmp(type, FLEXEncodeClass(NSArray)) == 0;
-                isJSONSerializableType = isJSONSerializableType || strcmp(type, FLEXEncodeClass(NSDictionary)) == 0;
-                
-                supported = isJSONSerializableType;
-            }
-        }
-    }
-    
-    return supported;
-}
-
-@end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputNumberView.m

@@ -30,12 +30,12 @@
 
 - (id)inputValue
 {
-    return [FLEXRuntimeUtility valueForNumberWithObjCType:[self.typeEncoding UTF8String] fromInputString:self.inputTextView.text];
+    return [FLEXRuntimeUtility valueForNumberWithObjCType:self.typeEncoding.UTF8String fromInputString:self.inputTextView.text];
 }
 
 + (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
 {
-    static NSArray *primitiveTypes = nil;
+    static NSArray<NSString *> *primitiveTypes = nil;
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
         primitiveTypes = @[@(@encode(char)),
@@ -49,7 +49,8 @@
                            @(@encode(unsigned long)),
                            @(@encode(unsigned long long)),
                            @(@encode(float)),
-                           @(@encode(double))];
+                           @(@encode(double)),
+                           @(@encode(long double))];
     });
     return type && [primitiveTypes containsObject:@(type)];
 }

Classes/Editing/ArgumentInputViews/FLEXArgumentInputObjectView.h

@@ -1,5 +1,5 @@
 //
-//  FLEXArgumentInputJSONObjectView.h
+//  FLEXArgumentInputObjectView.h
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/15/14.
@@ -8,6 +8,6 @@
 
 #import "FLEXArgumentInputTextView.h"
 
-@interface FLEXArgumentInputJSONObjectView : FLEXArgumentInputTextView
+@interface FLEXArgumentInputObjectView : FLEXArgumentInputTextView
 
 @end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputObjectView.m

@@ -0,0 +1,243 @@
+//
+//  FLEXArgumentInputJSONObjectView.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 6/15/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import "FLEXArgumentInputObjectView.h"
+#import "FLEXRuntimeUtility.h"
+
+static const CGFloat kSegmentInputMargin = 10;
+
+typedef NS_ENUM(NSUInteger, FLEXArgInputObjectType) {
+    FLEXArgInputObjectTypeJSON,
+    FLEXArgInputObjectTypeAddress
+};
+
+@interface FLEXArgumentInputObjectView ()
+
+@property (nonatomic) UISegmentedControl *objectTypeSegmentControl;
+@property (nonatomic) FLEXArgInputObjectType inputType;
+
+@end
+
+@implementation FLEXArgumentInputObjectView
+
+- (instancetype)initWithArgumentTypeEncoding:(const char *)typeEncoding
+{
+    self = [super initWithArgumentTypeEncoding:typeEncoding];
+    if (self) {
+        // Start with the numbers and punctuation keyboard since quotes, curly braces, or
+        // square brackets are likely to be the first characters type for the JSON.
+        self.inputTextView.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
+        self.targetSize = FLEXArgumentInputViewSizeLarge;
+
+        self.objectTypeSegmentControl = [[UISegmentedControl alloc] initWithItems:@[@"Value", @"Address"]];
+        [self.objectTypeSegmentControl addTarget:self action:@selector(didChangeType) forControlEvents:UIControlEventValueChanged];
+        self.objectTypeSegmentControl.selectedSegmentIndex = 0;
+        [self addSubview:self.objectTypeSegmentControl];
+
+        self.inputType = [[self class] preferredDefaultTypeForObjCType:typeEncoding withCurrentValue:nil];
+        self.objectTypeSegmentControl.selectedSegmentIndex = self.inputType;
+    }
+
+    return self;
+}
+
+- (void)didChangeType
+{
+    self.inputType = self.objectTypeSegmentControl.selectedSegmentIndex;
+
+    if (super.inputValue) {
+        // Trigger an update to the text field to show
+        // the address of the stored object we were given,
+        // or to show a JSON representation of the object
+        [self populateTextAreaFromValue:super.inputValue];
+    } else {
+        // Clear the text field
+        [self populateTextAreaFromValue:nil];
+    }
+}
+
+- (void)setInputType:(FLEXArgInputObjectType)inputType
+{
+    if (_inputType == inputType) return;
+
+    _inputType = inputType;
+
+    // Resize input view
+    switch (inputType) {
+        case FLEXArgInputObjectTypeJSON:
+            self.targetSize = FLEXArgumentInputViewSizeLarge;
+            break;
+        case FLEXArgInputObjectTypeAddress:
+            self.targetSize = FLEXArgumentInputViewSizeSmall;
+            break;
+    }
+
+    // Change placeholder
+    switch (inputType) {
+        case FLEXArgInputObjectTypeJSON:
+            self.inputPlaceholderText =
+            @"You can put any valid JSON here, such as a string, number, array, or dictionary:"
+            "\n\"This is a string\""
+            "\n1234"
+            "\n{ \"name\": \"Bob\", \"age\": 47 }"
+            "\n["
+            "\n   1, 2, 3"
+            "\n]";
+            break;
+        case FLEXArgInputObjectTypeAddress:
+            self.inputPlaceholderText = @"0x0000deadb33f";
+            break;
+    }
+
+    [self setNeedsLayout];
+    [self.superview setNeedsLayout];
+}
+
+- (void)setInputValue:(id)inputValue
+{
+    super.inputValue = inputValue;
+    [self populateTextAreaFromValue:inputValue];
+}
+
+- (id)inputValue
+{
+    switch (self.inputType) {
+        case FLEXArgInputObjectTypeJSON:
+            return [FLEXRuntimeUtility objectValueFromEditableJSONString:self.inputTextView.text];
+        case FLEXArgInputObjectTypeAddress: {
+            NSScanner *scanner = [NSScanner scannerWithString:self.inputTextView.text];
+
+            unsigned long long objectPointerValue;
+            if ([scanner scanHexLongLong:&objectPointerValue]) {
+                return (__bridge id)(void *)objectPointerValue;
+            }
+
+            return nil;
+        }
+    }
+}
+
+- (void)populateTextAreaFromValue:(id)value
+{
+    if (!value) {
+        self.inputTextView.text = nil;
+    } else {
+        if (self.inputType == FLEXArgInputObjectTypeJSON) {
+            self.inputTextView.text = [FLEXRuntimeUtility editableJSONStringForObject:value];
+        } else if (self.inputType == FLEXArgInputObjectTypeAddress) {
+            self.inputTextView.text = [NSString stringWithFormat:@"%p", value];
+        }
+    }
+
+    // Delegate methods are not called for programmatic changes
+    [self textViewDidChange:self.inputTextView];
+}
+
+- (CGSize)sizeThatFits:(CGSize)size
+{
+    CGSize fitSize = [super sizeThatFits:size];
+    fitSize.height += [self.objectTypeSegmentControl sizeThatFits:size].height + kSegmentInputMargin;
+
+    return fitSize;
+}
+
+- (void)layoutSubviews
+{
+    CGFloat segmentHeight = [self.objectTypeSegmentControl sizeThatFits:self.frame.size].height;
+    self.objectTypeSegmentControl.frame = CGRectMake(
+        0.0,
+        // Our segmented control is taking the position
+        // of the text view, as far as super is concerned,
+        // and we override this property to be different
+        super.topInputFieldVerticalLayoutGuide,
+        self.frame.size.width,
+        segmentHeight
+    );
+
+    [super layoutSubviews];
+}
+
+- (CGFloat)topInputFieldVerticalLayoutGuide
+{
+    // Our text view is offset from the segmented control
+    CGFloat segmentHeight = [self.objectTypeSegmentControl sizeThatFits:self.frame.size].height;
+    return segmentHeight + super.topInputFieldVerticalLayoutGuide + kSegmentInputMargin;
+}
+
++ (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
+{
+    NSParameterAssert(type);
+    // Must be object type
+    return type[0] == '@';
+}
+
++ (FLEXArgInputObjectType)preferredDefaultTypeForObjCType:(const char *)type withCurrentValue:(id)value
+{
+    NSParameterAssert(type[0] == '@');
+
+    if (value) {
+        // If there's a current value, it must be serializable to JSON
+        // to display the JSON editor. Otherwise display the address field.
+        if ([FLEXRuntimeUtility editableJSONStringForObject:value]) {
+            return FLEXArgInputObjectTypeJSON;
+        } else {
+            return FLEXArgInputObjectTypeAddress;
+        }
+    } else {
+        // Otherwise, see if we have more type information than just 'id'.
+        // If we do, make sure the encoding is something serializable to JSON.
+        // Properties and ivars keep more detailed type encoding information than method arguments.
+        if (strcmp(type, @encode(id)) != 0) {
+            BOOL isJSONSerializableType = NO;
+
+            // Parse class name out of the string,
+            // which is in the form `@"ClassName"`
+            Class cls = NSClassFromString(({
+                NSString *className = nil;
+                NSScanner *scan = [NSScanner scannerWithString:@(type)];
+                NSCharacterSet *allowed = [NSCharacterSet
+                    characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$"
+                ];
+
+                // Skip over the @" then scan the name
+                if ([scan scanString:@"@\"" intoString:nil]) {
+                    [scan scanCharactersFromSet:allowed intoString:&className];
+                }
+
+                className;
+            }));
+
+            // Note: we can't use @encode(NSString) here because that drops
+            // the class information and just goes to @encode(id).
+            NSArray<Class> *jsonTypes = @[
+                [NSString class],
+                [NSNumber class],
+                [NSArray class],
+                [NSDictionary class],
+            ];
+
+            // Look for matching types
+            for (Class jsonClass in jsonTypes) {
+                if ([cls isSubclassOfClass:jsonClass]) {
+                    isJSONSerializableType = YES;
+                    break;
+                }
+            }
+
+            if (isJSONSerializableType) {
+                return FLEXArgInputObjectTypeJSON;
+            } else {
+                return FLEXArgInputObjectTypeAddress;
+            }
+        } else {
+            return FLEXArgInputObjectTypeAddress;
+        }
+    }
+}
+
+@end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStringView.m

@@ -27,11 +27,12 @@
 
 - (id)inputValue
 {
-    // Interpret empty string as nil. We loose the ablitiy to set empty string as a string value,
+    // Interpret empty string as nil. We loose the ability to set empty string as a string value,
     // but we accept that tradeoff in exchange for not having to type quotes for every string.
-    return [self.inputTextView.text length] > 0 ? [self.inputTextView.text copy] : nil;
+    return self.inputTextView.text.length > 0 ? [self.inputTextView.text copy] : nil;
 }
 
+// TODO: Support using object address for strings, as in the object arg view.
 
 #pragma mark -
 

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStructView.m

@@ -12,7 +12,7 @@
 
 @interface FLEXArgumentInputStructView ()
 
-@property (nonatomic, strong) NSArray *argumentInputViews;
+@property (nonatomic) NSArray<FLEXArgumentInputView *> *argumentInputViews;
 
 @end
 
@@ -22,16 +22,16 @@
 {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        NSMutableArray *inputViews = [NSMutableArray array];
-        NSArray *customTitles = [[self class] customFieldTitlesForTypeEncoding:typeEncoding];
+        NSMutableArray<FLEXArgumentInputView *> *inputViews = [NSMutableArray array];
+        NSArray<NSString *> *customTitles = [[self class] customFieldTitlesForTypeEncoding:typeEncoding];
         [FLEXRuntimeUtility enumerateTypesInStructEncoding:typeEncoding usingBlock:^(NSString *structName, const char *fieldTypeEncoding, NSString *prettyTypeEncoding, NSUInteger fieldIndex, NSUInteger fieldOffset) {
             
             FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:fieldTypeEncoding];
             inputView.backgroundColor = self.backgroundColor;
             inputView.targetSize = FLEXArgumentInputViewSizeSmall;
             
-            if (fieldIndex < [customTitles count]) {
-                inputView.title = [customTitles objectAtIndex:fieldIndex];
+            if (fieldIndex < customTitles.count) {
+                inputView.title = customTitles[fieldIndex];
             } else {
                 inputView.title = [NSString stringWithFormat:@"%@ field %lu (%@)", structName, (unsigned long)fieldIndex, prettyTypeEncoding];
             }
@@ -59,7 +59,7 @@
 {
     if ([inputValue isKindOfClass:[NSValue class]]) {
         const char *structTypeEncoding = [inputValue objCType];
-        if (strcmp([self.typeEncoding UTF8String], structTypeEncoding) == 0) {
+        if (strcmp(self.typeEncoding.UTF8String, structTypeEncoding) == 0) {
             NSUInteger valueSize = 0;
             @try {
                 // NSGetSizeAndAlignment barfs on type encoding for bitfields.
@@ -72,9 +72,9 @@
                 [FLEXRuntimeUtility enumerateTypesInStructEncoding:structTypeEncoding usingBlock:^(NSString *structName, const char *fieldTypeEncoding, NSString *prettyTypeEncoding, NSUInteger fieldIndex, NSUInteger fieldOffset) {
                     
                     void *fieldPointer = unboxedValue + fieldOffset;
-                    FLEXArgumentInputView *inputView = [self.argumentInputViews objectAtIndex:fieldIndex];
+                    FLEXArgumentInputView *inputView = self.argumentInputViews[fieldIndex];
                     
-                    if (fieldTypeEncoding[0] == @encode(id)[0] || fieldTypeEncoding[0] == @encode(Class)[0]) {
+                    if (fieldTypeEncoding[0] == FLEXTypeEncodingObjcObject || fieldTypeEncoding[0] == FLEXTypeEncodingObjcClass) {
                         inputView.inputValue = (__bridge id)fieldPointer;
                     } else {
                         NSValue *boxedField = [FLEXRuntimeUtility valueForPrimitivePointer:fieldPointer objCType:fieldTypeEncoding];
@@ -90,7 +90,7 @@
 - (id)inputValue
 {
     NSValue *boxedStruct = nil;
-    const char *structTypeEncoding = [self.typeEncoding UTF8String];
+    const char *structTypeEncoding = self.typeEncoding.UTF8String;
     NSUInteger structSize = 0;
     @try {
         // NSGetSizeAndAlignment barfs on type encoding for bitfields.
@@ -102,9 +102,9 @@
         [FLEXRuntimeUtility enumerateTypesInStructEncoding:structTypeEncoding usingBlock:^(NSString *structName, const char *fieldTypeEncoding, NSString *prettyTypeEncoding, NSUInteger fieldIndex, NSUInteger fieldOffset) {
             
             void *fieldPointer = unboxedStruct + fieldOffset;
-            FLEXArgumentInputView *inputView = [self.argumentInputViews objectAtIndex:fieldIndex];
+            FLEXArgumentInputView *inputView = self.argumentInputViews[fieldIndex];
             
-            if (fieldTypeEncoding[0] == @encode(id)[0] || fieldTypeEncoding[0] == @encode(Class)[0]) {
+            if (fieldTypeEncoding[0] == FLEXTypeEncodingObjcObject || fieldTypeEncoding[0] == FLEXTypeEncodingObjcClass) {
                 // Object fields
                 memcpy(fieldPointer, (__bridge void *)inputView.inputValue, sizeof(id));
             } else {
@@ -176,18 +176,20 @@
 
 + (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
 {
-    return type && type[0] == '{';
+    return type && type[0] == FLEXTypeEncodingStructBegin;
 }
 
-+ (NSArray *)customFieldTitlesForTypeEncoding:(const char *)typeEncoding
++ (NSArray<NSString *> *)customFieldTitlesForTypeEncoding:(const char *)typeEncoding
 {
-    NSArray *customTitles = nil;
+    NSArray<NSString *> *customTitles = nil;
     if (strcmp(typeEncoding, @encode(CGRect)) == 0) {
         customTitles = @[@"CGPoint origin", @"CGSize size"];
     } else if (strcmp(typeEncoding, @encode(CGPoint)) == 0) {
         customTitles = @[@"CGFloat x", @"CGFloat y"];
     } else if (strcmp(typeEncoding, @encode(CGSize)) == 0) {
         customTitles = @[@"CGFloat width", @"CGFloat height"];
+    } else if (strcmp(typeEncoding, @encode(CGVector)) == 0) {
+        customTitles = @[@"CGFloat dx", @"CGFloat dy"];
     } else if (strcmp(typeEncoding, @encode(UIEdgeInsets)) == 0) {
         customTitles = @[@"CGFloat top", @"CGFloat left", @"CGFloat bottom", @"CGFloat right"];
     } else if (strcmp(typeEncoding, @encode(UIOffset)) == 0) {
@@ -203,6 +205,13 @@
         customTitles = @[@"CGFloat a", @"CGFloat b",
                          @"CGFloat c", @"CGFloat d",
                          @"CGFloat tx", @"CGFloat ty"];
+    } else {
+        if (@available(iOS 11.0, *)) {
+            if (strcmp(typeEncoding, @encode(NSDirectionalEdgeInsets)) == 0) {
+                customTitles = @[@"CGFloat top", @"CGFloat leading",
+                                 @"CGFloat bottom", @"CGFloat trailing"];
+            }
+        }
     }
     return customTitles;
 }

Classes/Editing/ArgumentInputViews/FLEXArgumentInputSwitchView.m

@@ -10,7 +10,7 @@
 
 @interface FLEXArgumentInputSwitchView ()
 
-@property (nonatomic, strong) UISwitch *inputSwitch;
+@property (nonatomic) UISwitch *inputSwitch;
 
 @end
 
@@ -20,7 +20,7 @@
 {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        self.inputSwitch = [[UISwitch alloc] init];
+        self.inputSwitch = [UISwitch new];
         [self.inputSwitch addTarget:self action:@selector(switchValueDidChange:) forControlEvents:UIControlEventValueChanged];
         [self.inputSwitch sizeToFit];
         [self addSubview:self.inputSwitch];

Classes/Editing/ArgumentInputViews/FLEXArgumentInputTextView.h

@@ -8,10 +8,11 @@
 
 #import "FLEXArgumentInputView.h"
 
-@interface FLEXArgumentInputTextView : FLEXArgumentInputView
+@interface FLEXArgumentInputTextView : FLEXArgumentInputView <UITextViewDelegate>
 
 // For subclass eyes only
 
-@property (nonatomic, strong, readonly) UITextView *inputTextView;
+@property (nonatomic, readonly) UITextView *inputTextView;
+@property (nonatomic) NSString *inputPlaceholderText;
 
 @end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputTextView.m

@@ -6,12 +6,14 @@
 //
 //
 
+#import "FLEXColor.h"
 #import "FLEXArgumentInputTextView.h"
 #import "FLEXUtility.h"
 
-@interface FLEXArgumentInputTextView () <UITextViewDelegate>
+@interface FLEXArgumentInputTextView ()
 
-@property (nonatomic, strong) UITextView *inputTextView;
+@property (nonatomic) UITextView *inputTextView;
+@property (nonatomic) UILabel *placeholderLabel;
 @property (nonatomic, readonly) NSUInteger numberOfInputLines;
 
 @end
@@ -22,23 +24,31 @@
 {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        self.inputTextView = [[UITextView alloc] init];
+        self.inputTextView = [UITextView new];
         self.inputTextView.font = [[self class] inputFont];
-        self.inputTextView.backgroundColor = [UIColor whiteColor];
-        self.inputTextView.layer.borderColor = [[UIColor blackColor] CGColor];
-        self.inputTextView.layer.borderWidth = 1.0;
+        self.inputTextView.backgroundColor = [FLEXColor primaryBackgroundColor];
+        self.inputTextView.layer.borderColor = [FLEXColor borderColor].CGColor;
+        self.inputTextView.layer.borderWidth = 1.f;
+        self.inputTextView.layer.cornerRadius = 5.f;
         self.inputTextView.autocapitalizationType = UITextAutocapitalizationTypeNone;
         self.inputTextView.autocorrectionType = UITextAutocorrectionTypeNo;
         self.inputTextView.delegate = self;
         self.inputTextView.inputAccessoryView = [self createToolBar];
         [self addSubview:self.inputTextView];
+
+        self.placeholderLabel = [UILabel new];
+        self.placeholderLabel.font = self.inputTextView.font;
+        self.placeholderLabel.textColor = [FLEXColor deemphasizedTextColor];
+        self.placeholderLabel.numberOfLines = 0;
+        [self.inputTextView addSubview:self.placeholderLabel];
+
     }
     return self;
 }
 
-#pragma mark - private
+#pragma mark - Private
 
-- (UIToolbar*)createToolBar
+- (UIToolbar *)createToolBar
 {
     UIToolbar *toolBar = [UIToolbar new];
     [toolBar sizeToFit];
@@ -53,12 +63,25 @@
     [self.inputTextView resignFirstResponder];
 }
 
-
-#pragma mark - Text View Changes
-
-- (void)textViewDidChange:(UITextView *)textView
+- (void)setInputPlaceholderText:(NSString *)placeholder
 {
-    [self.delegate argumentInputViewValueDidChange:self];
+    self.placeholderLabel.text = placeholder;
+    if (placeholder.length) {
+        if (!self.inputTextView.text.length) {
+            self.placeholderLabel.hidden = NO;
+        } else {
+            self.placeholderLabel.hidden = YES;
+        }
+    } else {
+        self.placeholderLabel.hidden = YES;
+    }
+
+    [self setNeedsLayout];
+}
+
+- (NSString *)inputPlaceholderText
+{
+    return self.placeholderLabel.text;
 }
 
 
@@ -77,25 +100,28 @@
     [super layoutSubviews];
     
     self.inputTextView.frame = CGRectMake(0, self.topInputFieldVerticalLayoutGuide, self.bounds.size.width, [self inputTextViewHeight]);
+    // Placeholder label is positioned by insetting origin,
+    // which is the line fragment padding for X and 0 for Y,
+    // by the content inset then the text container inset
+    CGFloat leading = self.inputTextView.textContainer.lineFragmentPadding;
+    CGSize s = self.inputTextView.frame.size;
+    self.placeholderLabel.frame = CGRectMake(leading, 0, s.width, s.height);
+    self.placeholderLabel.frame = UIEdgeInsetsInsetRect(
+        UIEdgeInsetsInsetRect(self.placeholderLabel.frame, self.inputTextView.contentInset),
+        self.inputTextView.textContainerInset
+    );
 }
 
 - (NSUInteger)numberOfInputLines
 {
-    NSUInteger numberOfInputLines = 0;
     switch (self.targetSize) {
         case FLEXArgumentInputViewSizeDefault:
-            numberOfInputLines = 2;
-            break;
-            
+            return 2;
         case FLEXArgumentInputViewSizeSmall:
-            numberOfInputLines = 1;
-            break;
-            
+            return 1;
         case FLEXArgumentInputViewSizeLarge:
-            numberOfInputLines = 8;
-            break;
+            return 8;
     }
-    return numberOfInputLines;
 }
 
 - (CGFloat)inputTextViewHeight
@@ -111,6 +137,20 @@
 }
 
 
+#pragma mark - Trait collection changes
+
+- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection
+{
+#if FLEX_AT_LEAST_IOS13_SDK
+    if (@available(iOS 13.0, *)) {
+        if (previousTraitCollection.userInterfaceStyle != self.traitCollection.userInterfaceStyle) {
+            self.inputTextView.layer.borderColor = [FLEXColor borderColor].CGColor;
+        }
+    }
+#endif
+}
+
+
 #pragma mark - Class Helpers
 
 + (UIFont *)inputFont
@@ -118,4 +158,13 @@
     return [FLEXUtility defaultFontOfSize:14.0];
 }
 
+
+#pragma mark - UITextViewDelegate
+
+- (void)textViewDidChange:(UITextView *)textView
+{
+    [self.delegate argumentInputViewValueDidChange:self];
+    self.placeholderLabel.hidden = !(self.inputPlaceholderText.length && !textView.text.length);
+}
+
 @end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputView.h

@@ -26,12 +26,13 @@ typedef NS_ENUM(NSUInteger, FLEXArgumentInputViewSize) {
 /// To populate the filed with an initial value, set this property.
 /// To reteive the value input by the user, access the property.
 /// Primitive types and structs should/will be boxed in NSValue containers.
-/// Concrete subclasses *must* override both the setter and getter for this property.
+/// Concrete subclasses should override both the setter and getter for this property.
+/// Subclasses can call super.inputValue to access a backing store for the value.
 @property (nonatomic) id inputValue;
 
 /// Setting this value to large will make some argument input views increase the size of their input field(s).
 /// Useful to increase the use of space if there is only one input view on screen (i.e. for property and ivar editing).
-@property (nonatomic, assign) FLEXArgumentInputViewSize targetSize;
+@property (nonatomic) FLEXArgumentInputViewSize targetSize;
 
 /// Users of the input view can get delegate callbacks for incremental changes in user input.
 @property (nonatomic, weak) id <FLEXArgumentInputViewDelegate> delegate;
@@ -47,8 +48,8 @@ typedef NS_ENUM(NSUInteger, FLEXArgumentInputViewSize) {
 
 // For subclass eyes only
 
-@property (nonatomic, strong, readonly) UILabel *titleLabel;
-@property (nonatomic, strong, readonly) NSString *typeEncoding;
+@property (nonatomic, readonly) UILabel *titleLabel;
+@property (nonatomic, readonly) NSString *typeEncoding;
 @property (nonatomic, readonly) CGFloat topInputFieldVerticalLayoutGuide;
 
 @end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputView.m

@@ -11,8 +11,8 @@
 
 @interface FLEXArgumentInputView ()
 
-@property (nonatomic, strong) UILabel *titleLabel;
-@property (nonatomic, strong) NSString *typeEncoding;
+@property (nonatomic) UILabel *titleLabel;
+@property (nonatomic) NSString *typeEncoding;
 
 @end
 
@@ -22,7 +22,7 @@
 {
     self = [super initWithFrame:CGRectZero];
     if (self) {
-        self.typeEncoding = @(typeEncoding);
+        self.typeEncoding = typeEncoding != NULL ? @(typeEncoding) : nil;
     }
     return self;
 }
@@ -56,7 +56,7 @@
 - (UILabel *)titleLabel
 {
     if (!_titleLabel) {
-        _titleLabel = [[UILabel alloc] init];
+        _titleLabel = [UILabel new];
         _titleLabel.font = [[self class] titleFont];
         _titleLabel.backgroundColor = self.backgroundColor;
         _titleLabel.textColor = [UIColor colorWithWhite:0.3 alpha:1.0];
@@ -68,7 +68,7 @@
 
 - (BOOL)showsTitle
 {
-    return [self.title length] > 0;
+    return self.title.length > 0;
 }
 
 - (CGFloat)topInputFieldVerticalLayoutGuide
@@ -89,17 +89,6 @@
     return NO;
 }
 
-- (void)setInputValue:(id)inputValue
-{
-    // Subclasses should override.
-}
-
-- (id)inputValue
-{
-    // Subclasses should override.
-    return nil;
-}
-
 + (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
 {
     return NO;
@@ -125,7 +114,7 @@
 {
     CGFloat height = 0;
     
-    if ([self.title length] > 0) {
+    if (self.title.length > 0) {
         CGSize constrainSize = CGSizeMake(size.width, CGFLOAT_MAX);
         height += ceil([self.titleLabel sizeThatFits:constrainSize].height);
         height += [[self class] titleBottomPadding];

Classes/Editing/ArgumentInputViews/FLEXArgumentInputViewFactory.m

@@ -8,7 +8,7 @@
 
 #import "FLEXArgumentInputViewFactory.h"
 #import "FLEXArgumentInputView.h"
-#import "FLEXArgumentInputJSONObjectView.h"
+#import "FLEXArgumentInputObjectView.h"
 #import "FLEXArgumentInputNumberView.h"
 #import "FLEXArgumentInputSwitchView.h"
 #import "FLEXArgumentInputStructView.h"
@@ -17,6 +17,7 @@
 #import "FLEXArgumentInputFontView.h"
 #import "FLEXArgumentInputColorView.h"
 #import "FLEXArgumentInputDateView.h"
+#import "FLEXRuntimeUtility.h"
 
 @implementation FLEXArgumentInputViewFactory
 
@@ -33,34 +34,35 @@
         // The unsupported view shows "nil" and does not allow user input.
         subclass = [FLEXArgumentInputNotSupportedView class];
     }
-    return [[subclass alloc] initWithArgumentTypeEncoding:typeEncoding];
+    // Remove the field name if there is any (e.g. \"width\"d -> d)
+    const NSUInteger fieldNameOffset = [FLEXRuntimeUtility fieldNameOffsetForTypeEncoding:typeEncoding];
+    return [[subclass alloc] initWithArgumentTypeEncoding:typeEncoding + fieldNameOffset];
 }
 
 + (Class)argumentInputViewSubclassForTypeEncoding:(const char *)typeEncoding currentValue:(id)currentValue
 {
+    // Remove the field name if there is any (e.g. \"width\"d -> d)
+    const NSUInteger fieldNameOffset = [FLEXRuntimeUtility fieldNameOffsetForTypeEncoding:typeEncoding];
     Class argumentInputViewSubclass = nil;
-    
+    NSArray<Class> *inputViewClasses = @[[FLEXArgumentInputColorView class],
+                                         [FLEXArgumentInputFontView class],
+                                         [FLEXArgumentInputStringView class],
+                                         [FLEXArgumentInputStructView class],
+                                         [FLEXArgumentInputSwitchView class],
+                                         [FLEXArgumentInputDateView class],
+                                         [FLEXArgumentInputNumberView class],
+                                         [FLEXArgumentInputObjectView class]];
+
     // Note that order is important here since multiple subclasses may support the same type.
     // An example is the number subclass and the bool subclass for the type @encode(BOOL).
     // Both work, but we'd prefer to use the bool subclass.
-    if ([FLEXArgumentInputColorView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputColorView class];
-    } else if ([FLEXArgumentInputFontView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputFontView class];
-    } else if ([FLEXArgumentInputStringView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputStringView class];
-    } else if ([FLEXArgumentInputStructView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputStructView class];
-    } else if ([FLEXArgumentInputSwitchView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputSwitchView class];
-    } else if ([FLEXArgumentInputDateView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputDateView class];
-    } else if ([FLEXArgumentInputNumberView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputNumberView class];
-    } else if ([FLEXArgumentInputJSONObjectView supportsObjCType:typeEncoding withCurrentValue:currentValue]) {
-        argumentInputViewSubclass = [FLEXArgumentInputJSONObjectView class];
+    for (Class inputViewClass in inputViewClasses) {
+        if ([inputViewClass supportsObjCType:typeEncoding + fieldNameOffset withCurrentValue:currentValue]) {
+            argumentInputViewSubclass = inputViewClass;
+            break;
+        }
     }
-    
+
     return argumentInputViewSubclass;
 }
 

Classes/Editing/FLEXDefaultEditorViewController.h

@@ -6,9 +6,9 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import "FLEXFieldEditorViewController.h"
+#import "FLEXMutableFieldEditorViewController.h"
 
-@interface FLEXDefaultEditorViewController : FLEXFieldEditorViewController
+@interface FLEXDefaultEditorViewController : FLEXMutableFieldEditorViewController
 
 - (id)initWithDefaults:(NSUserDefaults *)defaults key:(NSString *)key;
 

Classes/Editing/FLEXDefaultEditorViewController.m

@@ -15,7 +15,7 @@
 @interface FLEXDefaultEditorViewController ()
 
 @property (nonatomic, readonly) NSUserDefaults *defaults;
-@property (nonatomic, strong) NSString *key;
+@property (nonatomic) NSString *key;
 
 @end
 
@@ -43,7 +43,10 @@
     self.fieldEditorView.fieldDescription = self.key;
 
     id currentValue = [self.defaults objectForKey:self.key];
-    FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:@encode(id) currentValue:currentValue];
+    FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory
+        argumentInputViewForTypeEncoding:FLEXEncodeObject(currentValue)
+        currentValue:currentValue
+    ];
     inputView.backgroundColor = self.view.backgroundColor;
     inputView.inputValue = currentValue;
     self.fieldEditorView.argumentInputViews = @[inputView];
@@ -64,9 +67,19 @@
     self.firstInputView.inputValue = [self.defaults objectForKey:self.key];
 }
 
+- (void)getterButtonPressed:(id)sender
+{
+    [super getterButtonPressed:sender];
+    id returnedObject = [self.defaults objectForKey:self.key];
+    [self exploreObjectOrPopViewController:returnedObject];
+}
+
 + (BOOL)canEditDefaultWithValue:(id)currentValue
 {
-    return [FLEXArgumentInputViewFactory canEditFieldWithTypeEncoding:@encode(id) currentValue:currentValue];
+    return [FLEXArgumentInputViewFactory
+        canEditFieldWithTypeEncoding:FLEXEncodeObject(currentValue)
+        currentValue:currentValue
+    ];
 }
 
 @end

Classes/Editing/FLEXFieldEditorView.h

@@ -8,11 +8,13 @@
 
 #import <UIKit/UIKit.h>
 
+@class FLEXArgumentInputView;
+
 @interface FLEXFieldEditorView : UIView
 
 @property (nonatomic, copy) NSString *targetDescription;
 @property (nonatomic, copy) NSString *fieldDescription;
 
-@property (nonatomic, strong) NSArray *argumentInputViews;
+@property (nonatomic) NSArray<FLEXArgumentInputView *> *argumentInputViews;
 
 @end

Classes/Editing/FLEXFieldEditorView.m

@@ -12,10 +12,10 @@
 
 @interface FLEXFieldEditorView ()
 
-@property (nonatomic, strong) UILabel *targetDescriptionLabel;
-@property (nonatomic, strong) UIView *targetDescriptionDivider;
-@property (nonatomic, strong) UILabel *fieldDescriptionLabel;
-@property (nonatomic, strong) UIView *fieldDescriptionDivider;
+@property (nonatomic) UILabel *targetDescriptionLabel;
+@property (nonatomic) UIView *targetDescriptionDivider;
+@property (nonatomic) UILabel *fieldDescriptionLabel;
+@property (nonatomic) UIView *fieldDescriptionDivider;
 
 @end
 
@@ -25,7 +25,7 @@
 {
     self = [super initWithFrame:frame];
     if (self) {
-        self.targetDescriptionLabel = [[UILabel alloc] init];
+        self.targetDescriptionLabel = [UILabel new];
         self.targetDescriptionLabel.numberOfLines = 0;
         self.targetDescriptionLabel.font = [[self class] labelFont];
         [self addSubview:self.targetDescriptionLabel];
@@ -33,7 +33,7 @@
         self.targetDescriptionDivider = [[self class] dividerView];
         [self addSubview:self.targetDescriptionDivider];
         
-        self.fieldDescriptionLabel = [[UILabel alloc] init];
+        self.fieldDescriptionLabel = [UILabel new];
         self.fieldDescriptionLabel.numberOfLines = 0;
         self.fieldDescriptionLabel.font = [[self class] labelFont];
         [self addSubview:self.fieldDescriptionLabel];
@@ -103,7 +103,7 @@
     }
 }
 
-- (void)setArgumentInputViews:(NSArray *)argumentInputViews
+- (void)setArgumentInputViews:(NSArray<FLEXArgumentInputView *> *)argumentInputViews
 {
     if (![_argumentInputViews isEqual:argumentInputViews]) {
         
@@ -123,14 +123,14 @@
 
 + (UIView *)dividerView
 {
-    UIView *dividerView = [[UIView alloc] init];
+    UIView *dividerView = [UIView new];
     dividerView.backgroundColor = [self dividerColor];
     return dividerView;
 }
 
 + (UIColor *)dividerColor
 {
-    return [UIColor lightGrayColor];
+    return UIColor.lightGrayColor;
 }
 
 + (CGFloat)horizontalPadding

Classes/Editing/FLEXFieldEditorViewController.h

@@ -19,10 +19,14 @@
 @property (nonatomic, readonly) FLEXArgumentInputView *firstInputView;
 
 // For subclass use only.
-@property (nonatomic, strong, readonly) id target;
-@property (nonatomic, strong, readonly) FLEXFieldEditorView *fieldEditorView;
-@property (nonatomic, strong, readonly) UIBarButtonItem *setterButton;
+@property (nonatomic, readonly) id target;
+@property (nonatomic, readonly) FLEXFieldEditorView *fieldEditorView;
+@property (nonatomic, readonly) UIBarButtonItem *setterButton;
+
 - (void)actionButtonPressed:(id)sender;
 - (NSString *)titleForActionButton;
+/// Pushes an explorer view controller for the given object
+/// or pops the current view controller.
+- (void)exploreObjectOrPopViewController:(id)objectOrNil;
 
 @end

Classes/Editing/FLEXFieldEditorViewController.m

@@ -6,20 +6,23 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
+#import "FLEXColor.h"
 #import "FLEXFieldEditorViewController.h"
 #import "FLEXFieldEditorView.h"
 #import "FLEXRuntimeUtility.h"
 #import "FLEXUtility.h"
+#import "FLEXObjectExplorerFactory.h"
 #import "FLEXArgumentInputView.h"
 #import "FLEXArgumentInputViewFactory.h"
+#import "FLEXObjectExplorerViewController.h"
 
 @interface FLEXFieldEditorViewController () <UIScrollViewDelegate>
 
-@property (nonatomic, strong) UIScrollView *scrollView;
+@property (nonatomic) UIScrollView *scrollView;
 
-@property (nonatomic, strong, readwrite) id target;
-@property (nonatomic, strong, readwrite) FLEXFieldEditorView *fieldEditorView;
-@property (nonatomic, strong, readwrite) UIBarButtonItem *setterButton;
+@property (nonatomic, readwrite) id target;
+@property (nonatomic, readwrite) FLEXFieldEditorView *fieldEditorView;
+@property (nonatomic, readwrite) UIBarButtonItem *setterButton;
 
 @end
 
@@ -30,15 +33,15 @@
     self = [super initWithNibName:nil bundle:nil];
     if (self) {
         self.target = target;
-        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
-        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
+        [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
+        [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
     }
     return self;
 }
 
 - (void)dealloc
 {
-    [[NSNotificationCenter defaultCenter] removeObserver:self];
+    [NSNotificationCenter.defaultCenter removeObserver:self];
 }
 
 - (void)keyboardDidShow:(NSNotification *)notification
@@ -72,7 +75,7 @@
 {
     [super viewDidLoad];
     
-    self.view.backgroundColor = [FLEXUtility scrollViewGrayColor];
+    self.view.backgroundColor = [FLEXColor scrollViewBackgroundColor];
     
     self.scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
     self.scrollView.backgroundColor = self.view.backgroundColor;
@@ -80,7 +83,7 @@
     self.scrollView.delegate = self;
     [self.view addSubview:self.scrollView];
     
-    self.fieldEditorView = [[FLEXFieldEditorView alloc] init];
+    self.fieldEditorView = [FLEXFieldEditorView new];
     self.fieldEditorView.backgroundColor = self.view.backgroundColor;
     self.fieldEditorView.targetDescription = [NSString stringWithFormat:@"%@ %p", [self.target class], self.target];
     [self.scrollView addSubview:self.fieldEditorView];
@@ -99,7 +102,7 @@
 
 - (FLEXArgumentInputView *)firstInputView
 {
-    return [[self.fieldEditorView argumentInputViews] firstObject];
+    return [self.fieldEditorView argumentInputViews].firstObject;
 }
 
 - (void)actionButtonPressed:(id)sender
@@ -114,4 +117,16 @@
     return @"Set";
 }
 
+- (void)exploreObjectOrPopViewController:(id)objectOrNil {
+    if (objectOrNil) {
+        // For non-nil (or void) return types, push an explorer view controller to display the object
+        FLEXObjectExplorerViewController *explorerViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:objectOrNil];
+        [self.navigationController pushViewController:explorerViewController animated:YES];
+    } else {
+        // If we didn't get a returned object but the method call succeeded,
+        // pop this view controller off the stack to indicate that the call went through.
+        [self.navigationController popViewControllerAnimated:YES];
+    }
+}
+
 @end

Classes/Editing/FLEXIvarEditorViewController.h

@@ -6,10 +6,10 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import "FLEXFieldEditorViewController.h"
+#import "FLEXMutableFieldEditorViewController.h"
 #import <objc/runtime.h>
 
-@interface FLEXIvarEditorViewController : FLEXFieldEditorViewController
+@interface FLEXIvarEditorViewController : FLEXMutableFieldEditorViewController
 
 - (id)initWithTarget:(id)target ivar:(Ivar)ivar;
 

Classes/Editing/FLEXIvarEditorViewController.m

@@ -15,7 +15,7 @@
 
 @interface FLEXIvarEditorViewController () <FLEXArgumentInputViewDelegate>
 
-@property (nonatomic, assign) Ivar ivar;
+@property (nonatomic) Ivar ivar;
 
 @end
 
@@ -52,9 +52,23 @@
 - (void)actionButtonPressed:(id)sender
 {
     [super actionButtonPressed:sender];
+
+    // TODO: check mutability and use mutableCopy if necessary;
+    // this currently could and would assign NSArray to NSMutableArray
     
     [FLEXRuntimeUtility setValue:self.firstInputView.inputValue forIvar:self.ivar onObject:self.target];
     self.firstInputView.inputValue = [FLEXRuntimeUtility valueForIvar:self.ivar onObject:self.target];
+    
+    // Pop view controller for consistency;
+    // property setters and method calls also pop on success.
+    [self.navigationController popViewControllerAnimated:YES];
+}
+
+- (void)getterButtonPressed:(id)sender
+{
+    [super getterButtonPressed:sender];
+    id returnedObject = [FLEXRuntimeUtility valueForIvar:self.ivar onObject:self.target];
+    [self exploreObjectOrPopViewController:returnedObject];
 }
 
 - (void)argumentInputViewValueDidChange:(FLEXArgumentInputView *)argumentInputView

Classes/Editing/FLEXMethodCallingViewController.m

@@ -13,10 +13,12 @@
 #import "FLEXObjectExplorerViewController.h"
 #import "FLEXArgumentInputView.h"
 #import "FLEXArgumentInputViewFactory.h"
+#import "FLEXUtility.h"
 
 @interface FLEXMethodCallingViewController ()
 
-@property (nonatomic, assign) Method method;
+@property (nonatomic) Method method;
+@property (nonatomic) FLEXTypeEncoding *returnType;
 
 @end
 
@@ -27,6 +29,7 @@
     self = [super initWithTarget:target];
     if (self) {
         self.method = method;
+        self.returnType = [FLEXRuntimeUtility returnTypeForMethod:method];
         self.title = [self isClassMethod] ? @"Class Method" : @"Method";
     }
     return self;
@@ -36,10 +39,14 @@
 {
     [super viewDidLoad];
     
-    self.fieldEditorView.fieldDescription = [FLEXRuntimeUtility prettyNameForMethod:self.method isClassMethod:[self isClassMethod]];
+    NSString *returnType = @((const char *)self.returnType);
+    NSString *methodDescription = [FLEXRuntimeUtility prettyNameForMethod:self.method isClassMethod:[self isClassMethod]];
+    NSString *format = @"Signature:\n%@\n\nReturn Type:\n%@";
+    NSString *info = [NSString stringWithFormat:format, methodDescription, returnType];
+    self.fieldEditorView.fieldDescription = info;
     
-    NSArray *methodComponents = [FLEXRuntimeUtility prettyArgumentComponentsForMethod:self.method];
-    NSMutableArray *argumentInputViews = [NSMutableArray array];
+    NSArray<NSString *> *methodComponents = [FLEXRuntimeUtility prettyArgumentComponentsForMethod:self.method];
+    NSMutableArray<FLEXArgumentInputView *> *argumentInputViews = [NSMutableArray array];
     unsigned int argumentIndex = kFLEXNumberOfImplicitArgs;
     for (NSString *methodComponent in methodComponents) {
         char *argumentTypeEncoding = method_copyArgumentType(self.method, argumentIndex);
@@ -54,6 +61,12 @@
     self.fieldEditorView.argumentInputViews = argumentInputViews;
 }
 
+- (void)dealloc
+{
+    free(self.returnType);
+    self.returnType = NULL;
+}
+
 - (BOOL)isClassMethod
 {
     return self.target && self.target == [self.target class];
@@ -82,18 +95,14 @@
     id returnedObject = [FLEXRuntimeUtility performSelector:method_getName(self.method) onObject:self.target withArguments:arguments error:&error];
     
     if (error) {
-        NSString *title = @"Method Call Failed";
-        NSString *message = [error localizedDescription];
-        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
-        [alert show];
+        [FLEXAlert showAlert:@"Method Call Failed" message:[error localizedDescription] from:self];
     } else if (returnedObject) {
         // For non-nil (or void) return types, push an explorer view controller to display the returned object
+        returnedObject = [FLEXRuntimeUtility potentiallyUnwrapBoxedPointer:returnedObject type:self.returnType];
         FLEXObjectExplorerViewController *explorerViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:returnedObject];
         [self.navigationController pushViewController:explorerViewController animated:YES];
     } else {
-        // If we didn't get a returned object but the method call succeeded,
-        // pop this view controller off the stack to indicate that the call went through.
-        [self.navigationController popViewControllerAnimated:YES];
+        [self exploreObjectOrPopViewController:returnedObject];
     }
 }
 

Classes/Editing/FLEXMutableFieldEditorViewController.h

@@ -0,0 +1,18 @@
+//
+//  FLEXMutableFieldEditorViewController.h
+//  FLEX
+//
+//  Created by Tanner on 11/22/18.
+//  Copyright © 2018 Flipboard. All rights reserved.
+//
+
+#import "FLEXFieldEditorViewController.h"
+
+@interface FLEXMutableFieldEditorViewController : FLEXFieldEditorViewController
+
+@property (nonatomic, readonly) UIBarButtonItem *getterButton;
+
+- (void)getterButtonPressed:(id)sender;
+- (NSString *)titleForGetterButton;
+
+@end

Classes/Editing/FLEXMutableFieldEditorViewController.m

@@ -0,0 +1,36 @@
+//
+//  FLEXMutableFieldEditorViewController.m
+//  FLEX
+//
+//  Created by Tanner on 11/22/18.
+//  Copyright © 2018 Flipboard. All rights reserved.
+//
+
+#import "FLEXMutableFieldEditorViewController.h"
+#import "FLEXFieldEditorView.h"
+
+@interface FLEXMutableFieldEditorViewController ()
+
+@property (nonatomic, readwrite) UIBarButtonItem *getterButton;
+
+@end
+
+@implementation FLEXMutableFieldEditorViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.getterButton = [[UIBarButtonItem alloc] initWithTitle:[self titleForGetterButton] style:UIBarButtonItemStyleDone target:self action:@selector(getterButtonPressed:)];
+    self.navigationItem.rightBarButtonItems = @[self.setterButton, self.getterButton];
+}
+
+- (void)getterButtonPressed:(id)sender {
+    // Subclasses can override
+    [self.fieldEditorView endEditing:YES];
+}
+
+- (NSString *)titleForGetterButton {
+    return @"Get";
+}
+
+@end

Classes/Editing/FLEXPropertyEditorViewController.h

@@ -6,13 +6,13 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import "FLEXFieldEditorViewController.h"
+#import "FLEXMutableFieldEditorViewController.h"
 #import <objc/runtime.h>
 
-@interface FLEXPropertyEditorViewController : FLEXFieldEditorViewController
+@interface FLEXPropertyEditorViewController : FLEXMutableFieldEditorViewController
 
 - (id)initWithTarget:(id)target property:(objc_property_t)property;
 
-+ (BOOL)canEditProperty:(objc_property_t)property currentValue:(id)value;
++ (BOOL)canEditProperty:(objc_property_t)property onObject:(id)object currentValue:(id)value;
 
 @end

Classes/Editing/FLEXPropertyEditorViewController.m

@@ -12,10 +12,11 @@
 #import "FLEXArgumentInputView.h"
 #import "FLEXArgumentInputViewFactory.h"
 #import "FLEXArgumentInputSwitchView.h"
+#import "FLEXUtility.h"
 
 @interface FLEXPropertyEditorViewController () <FLEXArgumentInputViewDelegate>
 
-@property (nonatomic, assign) objc_property_t property;
+@property (nonatomic) objc_property_t property;
 
 @end
 
@@ -37,9 +38,9 @@
     
     self.fieldEditorView.fieldDescription = [FLEXRuntimeUtility fullDescriptionForProperty:self.property];
     id currentValue = [FLEXRuntimeUtility valueForProperty:self.property onObject:self.target];
-    self.setterButton.enabled = [[self class] canEditProperty:self.property currentValue:currentValue];
+    self.setterButton.enabled = [[self class] canEditProperty:self.property onObject:self.target currentValue:currentValue];
     
-    const char *typeEncoding = [[FLEXRuntimeUtility typeEncodingForProperty:self.property] UTF8String];
+    const char *typeEncoding = [FLEXRuntimeUtility typeEncodingForProperty:self.property].UTF8String;
     FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:typeEncoding];
     inputView.backgroundColor = self.view.backgroundColor;
     inputView.inputValue = [FLEXRuntimeUtility valueForProperty:self.property onObject:self.target];
@@ -62,10 +63,7 @@
     NSError *error = nil;
     [FLEXRuntimeUtility performSelector:setterSelector onObject:self.target withArguments:arguments error:&error];
     if (error) {
-        NSString *title = @"Property Setter Failed";
-        NSString *message = [error localizedDescription];
-        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
-        [alert show];
+        [FLEXAlert showAlert:@"Property Setter Failed" message:[error localizedDescription] from:self];
         self.firstInputView.inputValue = [FLEXRuntimeUtility valueForProperty:self.property onObject:self.target];
     } else {
         // If the setter was called without error, pop the view controller to indicate that and make the user's life easier.
@@ -76,6 +74,13 @@
     }
 }
 
+- (void)getterButtonPressed:(id)sender
+{
+    [super getterButtonPressed:sender];
+    id returnedObject = [FLEXRuntimeUtility valueForProperty:self.property onObject:self.target];
+    [self exploreObjectOrPopViewController:returnedObject];
+}
+
 - (void)argumentInputViewValueDidChange:(FLEXArgumentInputView *)argumentInputView
 {
     if ([argumentInputView isKindOfClass:[FLEXArgumentInputSwitchView class]]) {
@@ -83,11 +88,12 @@
     }
 }
 
-+ (BOOL)canEditProperty:(objc_property_t)property currentValue:(id)value
++ (BOOL)canEditProperty:(objc_property_t)property onObject:(id)object currentValue:(id)value
 {
-    const char *typeEncoding = [[FLEXRuntimeUtility typeEncodingForProperty:property] UTF8String];
+    const char *typeEncoding = [FLEXRuntimeUtility typeEncodingForProperty:property].UTF8String;
     BOOL canEditType = [FLEXArgumentInputViewFactory canEditFieldWithTypeEncoding:typeEncoding currentValue:value];
-    BOOL isReadonly = [FLEXRuntimeUtility isReadonlyProperty:property];
+    SEL setterSelector = [FLEXRuntimeUtility setterSelectorForProperty:property];
+    BOOL isReadonly = [FLEXRuntimeUtility isReadonlyProperty:property] && (!setterSelector || ![object respondsToSelector:setterSelector]);
     return canEditType && !isReadonly;
 }
 

Classes/ExplorerInterface/FLEXExplorerViewController.h

@@ -10,6 +10,7 @@
 
 @protocol FLEXExplorerViewControllerDelegate;
 
+/// A view controller that manages the FLEX toolbar.
 @interface FLEXExplorerViewController : UIViewController
 
 @property (nonatomic, weak) id <FLEXExplorerViewControllerDelegate> delegate;
@@ -17,6 +18,12 @@
 - (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates;
 - (BOOL)wantsWindowToBecomeKey;
 
+/// @brief Used to present (or dismiss) a modal view controller ("tool"), typically triggered by pressing a button in the toolbar.
+///
+/// If a tool is already presented, this method simply dismisses it and calls the completion block.
+/// If no tool is presented, @code future() @endcode is presented and the completion block is called.
+- (void)toggleToolWithViewControllerProvider:(UIViewController *(^)(void))future completion:(void(^)(void))completion;
+
 // Keyboard shortcut helpers
 
 - (void)toggleSelectTool;

Classes/ExplorerInterface/FLEXExplorerViewController.m

@@ -16,6 +16,8 @@
 #import "FLEXObjectExplorerFactory.h"
 #import "FLEXNetworkHistoryTableViewController.h"
 
+static NSString *const kFLEXToolbarTopMarginDefaultsKey = @"com.flex.FLEXToolbar.topMargin";
+
 typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     FLEXExplorerModeDefault,
     FLEXExplorerModeSelect,
@@ -24,49 +26,43 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 @interface FLEXExplorerViewController () <FLEXHierarchyTableViewControllerDelegate, FLEXGlobalsTableViewControllerDelegate>
 
-@property (nonatomic, strong) FLEXExplorerToolbar *explorerToolbar;
+@property (nonatomic) FLEXExplorerToolbar *explorerToolbar;
 
 /// Tracks the currently active tool/mode
-@property (nonatomic, assign) FLEXExplorerMode currentMode;
+@property (nonatomic) FLEXExplorerMode currentMode;
 
 /// Gesture recognizer for dragging a view in move mode
-@property (nonatomic, strong) UIPanGestureRecognizer *movePanGR;
+@property (nonatomic) UIPanGestureRecognizer *movePanGR;
 
 /// Gesture recognizer for showing additional details on the selected view
-@property (nonatomic, strong) UITapGestureRecognizer *detailsTapGR;
+@property (nonatomic) UITapGestureRecognizer *detailsTapGR;
 
 /// Only valid while a move pan gesture is in progress.
-@property (nonatomic, assign) CGRect selectedViewFrameBeforeDragging;
+@property (nonatomic) CGRect selectedViewFrameBeforeDragging;
 
 /// Only valid while a toolbar drag pan gesture is in progress.
-@property (nonatomic, assign) CGRect toolbarFrameBeforeDragging;
+@property (nonatomic) CGRect toolbarFrameBeforeDragging;
 
 /// Borders of all the visible views in the hierarchy at the selection point.
-/// The keys are NSValues with the correponding view (nonretained).
-@property (nonatomic, strong) NSDictionary *outlineViewsForVisibleViews;
+/// The keys are NSValues with the corresponding view (nonretained).
+@property (nonatomic) NSDictionary<NSValue *, UIView *> *outlineViewsForVisibleViews;
 
 /// The actual views at the selection point with the deepest view last.
-@property (nonatomic, strong) NSArray *viewsAtTapPoint;
+@property (nonatomic) NSArray<UIView *> *viewsAtTapPoint;
 
 /// The view that we're currently highlighting with an overlay and displaying details for.
-@property (nonatomic, strong) UIView *selectedView;
+@property (nonatomic) UIView *selectedView;
 
 /// A colored transparent overlay to indicate that the view is selected.
-@property (nonatomic, strong) UIView *selectedViewOverlay;
+@property (nonatomic) UIView *selectedViewOverlay;
 
 /// Tracked so we can restore the key window after dismissing a modal.
-/// We need to become key after modal presentation so we can correctly capture intput.
+/// We need to become key after modal presentation so we can correctly capture input.
 /// If we're just showing the toolbar, we want the main app's window to remain key so that we don't interfere with input, status bar, etc.
-@property (nonatomic, strong) UIWindow *previousKeyWindow;
-
-/// Similar to the previousKeyWindow property above, we need to track status bar styling if
-/// the app doesn't use view controller based status bar management. When we present a modal,
-/// we want to change the status bar style to UIStausBarStyleDefault. Before changing, we stash
-/// the current style. On dismissal, we return the staus bar to the style that the app was using previously.
-@property (nonatomic, assign) UIStatusBarStyle previousStatusBarStyle;
+@property (nonatomic) UIWindow *previousKeyWindow;
 
 /// All views that we're KVOing. Used to help us clean up properly.
-@property (nonatomic, strong) NSMutableSet *observedViews;
+@property (nonatomic) NSMutableSet<UIView *> *observedViews;
 
 @end
 
@@ -91,13 +87,17 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 - (void)viewDidLoad
 {
     [super viewDidLoad];
-	
+
     // Toolbar
-    self.explorerToolbar = [[FLEXExplorerToolbar alloc] init];
-    CGSize toolbarSize = [self.explorerToolbar sizeThatFits:self.view.bounds.size];
+    self.explorerToolbar = [FLEXExplorerToolbar new];
+
     // Start the toolbar off below any bars that may be at the top of the view.
-    CGFloat toolbarOriginY = 100.0;
-    self.explorerToolbar.frame = CGRectMake(0.0, toolbarOriginY, toolbarSize.width, toolbarSize.height);
+    id toolbarOriginYDefault = [[NSUserDefaults standardUserDefaults] objectForKey:kFLEXToolbarTopMarginDefaultsKey];
+    CGFloat toolbarOriginY = toolbarOriginYDefault ? [toolbarOriginYDefault doubleValue] : 100;
+
+    CGRect safeArea = [self viewSafeArea];
+    CGSize toolbarSize = [self.explorerToolbar sizeThatFits:CGSizeMake(CGRectGetWidth(self.view.bounds), CGRectGetHeight(safeArea))];
+    [self updateToolbarPositionWithUnconstrainedFrame:CGRectMake(CGRectGetMinX(safeArea), toolbarOriginY, toolbarSize.width, toolbarSize.height)];
     self.explorerToolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleTopMargin;
     [self.view addSubview:self.explorerToolbar];
     [self setupToolbarActions];
@@ -125,16 +125,15 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (UIViewController *)viewControllerForRotationAndOrientation
 {
-    UIWindow *window = self.previousKeyWindow ?: [[UIApplication sharedApplication] keyWindow];
+    UIWindow *window = self.previousKeyWindow ?: [UIApplication.sharedApplication keyWindow];
     UIViewController *viewController = window.rootViewController;
+    // Obfuscating selector _viewControllerForSupportedInterfaceOrientations
     NSString *viewControllerSelectorString = [@[@"_vie", @"wContro", @"llerFor", @"Supported", @"Interface", @"Orientations"] componentsJoinedByString:@""];
     SEL viewControllerSelector = NSSelectorFromString(viewControllerSelectorString);
     if ([viewController respondsToSelector:viewControllerSelector]) {
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
-        viewController = [viewController performSelector:viewControllerSelector];
-#pragma clang diagnostic pop
+        viewController = [viewController valueForKey:viewControllerSelectorString];
     }
+    
     return viewController;
 }
 
@@ -147,7 +146,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
     
     // The UIViewController docs state that this method must not return zero.
-    // If we weren't able to get a valid value for the supported interface orientations, default to all supported.
+    // If we weren't able to get a valid value for the supported interface
+    // orientations, default to all supported.
     if (supportedOrientations == 0) {
         supportedOrientations = UIInterfaceOrientationMaskAll;
     }
@@ -165,31 +165,29 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return shouldAutorotate;
 }
 
-- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
+- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
 {
-    for (UIView *outlineView in [self.outlineViewsForVisibleViews allValues]) {
-        outlineView.hidden = YES;
-    }
-    self.selectedViewOverlay.hidden = YES;
-}
-
-- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
-{
-    for (UIView *view in self.viewsAtTapPoint) {
-        NSValue *key = [NSValue valueWithNonretainedObject:view];
-        UIView *outlineView = self.outlineViewsForVisibleViews[key];
-        outlineView.frame = [self frameInLocalCoordinatesForView:view];
-        if (self.currentMode == FLEXExplorerModeSelect) {
-            outlineView.hidden = NO;
+    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {
+        for (UIView *outlineView in self.outlineViewsForVisibleViews.allValues) {
+            outlineView.hidden = YES;
+        }
+        self.selectedViewOverlay.hidden = YES;
+    } completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {
+        for (UIView *view in self.viewsAtTapPoint) {
+            NSValue *key = [NSValue valueWithNonretainedObject:view];
+            UIView *outlineView = self.outlineViewsForVisibleViews[key];
+            outlineView.frame = [self frameInLocalCoordinatesForView:view];
+            if (self.currentMode == FLEXExplorerModeSelect) {
+                outlineView.hidden = NO;
+            }
         }
-    }
-    
-    if (self.selectedView) {
-        self.selectedViewOverlay.frame = [self frameInLocalCoordinatesForView:self.selectedView];
-        self.selectedViewOverlay.hidden = NO;
-    }
-}
 
+        if (self.selectedView) {
+            self.selectedViewOverlay.frame = [self frameInLocalCoordinatesForView:self.selectedView];
+            self.selectedViewOverlay.hidden = NO;
+        }
+    }];
+}
 
 #pragma mark - Setter Overrides
 
@@ -206,17 +204,17 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
         // Update the toolbar and selected overlay
         self.explorerToolbar.selectedViewDescription = [FLEXUtility descriptionForView:selectedView includingFrame:YES];
-        self.explorerToolbar.selectedViewOverlayColor = [FLEXUtility consistentRandomColorForObject:selectedView];;
+        self.explorerToolbar.selectedViewOverlayColor = [FLEXUtility consistentRandomColorForObject:selectedView];
 
         if (selectedView) {
             if (!self.selectedViewOverlay) {
-                self.selectedViewOverlay = [[UIView alloc] init];
+                self.selectedViewOverlay = [UIView new];
                 [self.view addSubview:self.selectedViewOverlay];
                 self.selectedViewOverlay.layer.borderWidth = 1.0;
             }
             UIColor *outlineColor = [FLEXUtility consistentRandomColorForObject:selectedView];
             self.selectedViewOverlay.backgroundColor = [outlineColor colorWithAlphaComponent:0.2];
-            self.selectedViewOverlay.layer.borderColor = [outlineColor CGColor];
+            self.selectedViewOverlay.layer.borderColor = outlineColor.CGColor;
             self.selectedViewOverlay.frame = [self.view convertRect:selectedView.bounds fromView:selectedView];
             
             // Make sure the selected overlay is in front of all the other subviews except the toolbar, which should always stay on top.
@@ -232,7 +230,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
 }
 
-- (void)setViewsAtTapPoint:(NSArray *)viewsAtTapPoint
+- (void)setViewsAtTapPoint:(NSArray<UIView *> *)viewsAtTapPoint
 {
     if (![_viewsAtTapPoint isEqual:viewsAtTapPoint]) {
         for (UIView *view in _viewsAtTapPoint) {
@@ -262,7 +260,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
                 
             case FLEXExplorerModeSelect:
                 // Make sure the outline views are unhidden in case we came from the move mode.
-                for (id key in self.outlineViewsForVisibleViews) {
+                for (NSValue *key in self.outlineViewsForVisibleViews) {
                     UIView *outlineView = self.outlineViewsForVisibleViews[key];
                     outlineView.hidden = NO;
                 }
@@ -270,7 +268,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
                 
             case FLEXExplorerModeMove:
                 // Hide all the outline views to focus on the selected view, which is the only one that will move.
-                for (id key in self.outlineViewsForVisibleViews) {
+                for (NSValue *key in self.outlineViewsForVisibleViews) {
                     UIView *outlineView = self.outlineViewsForVisibleViews[key];
                     outlineView.hidden = YES;
                 }
@@ -311,9 +309,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     [self.observedViews removeObject:view];
 }
 
-+ (NSArray *)viewKeyPathsToTrack
++ (NSArray<NSString *> *)viewKeyPathsToTrack
 {
-    static NSArray *trackedViewKeyPaths = nil;
+    static NSArray<NSString *> *trackedViewKeyPaths = nil;
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
         NSString *frameKeyPath = NSStringFromSelector(@selector(frame));
@@ -322,7 +320,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return trackedViewKeyPaths;
 }
 
-- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *, id> *)change context:(void *)context
 {
     [self updateOverlayAndDescriptionForObjectIfNeeded:object];
 }
@@ -331,9 +329,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     NSUInteger indexOfView = [self.viewsAtTapPoint indexOfObject:object];
     if (indexOfView != NSNotFound) {
-        UIView *view = [self.viewsAtTapPoint objectAtIndex:indexOfView];
+        UIView *view = self.viewsAtTapPoint[indexOfView];
         NSValue *key = [NSValue valueWithNonretainedObject:view];
-        UIView *outline = [self.outlineViewsForVisibleViews objectForKey:key];
+        UIView *outline = self.outlineViewsForVisibleViews[key];
         if (outline) {
             outline.frame = [self frameInLocalCoordinatesForView:view];
         }
@@ -376,10 +374,10 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     [self toggleViewsTool];
 }
 
-- (NSArray *)allViewsInHierarchy
+- (NSArray<UIView *> *)allViewsInHierarchy
 {
-    NSMutableArray *allViews = [NSMutableArray array];
-    NSArray *windows = [self allWindows];
+    NSMutableArray<UIView *> *allViews = [NSMutableArray array];
+    NSArray<UIWindow *> *windows = [FLEXUtility allWindows];
     for (UIWindow *window in windows) {
         if (window != self.view.window) {
             [allViews addObject:window];
@@ -389,32 +387,10 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return allViews;
 }
 
-- (NSArray *)allWindows
-{
-    BOOL includeInternalWindows = YES;
-    BOOL onlyVisibleWindows = NO;
-
-    NSArray *allWindowsComponents = @[@"al", @"lWindo", @"wsIncl", @"udingInt", @"ernalWin", @"dows:o", @"nlyVisi", @"bleWin", @"dows:"];
-    SEL allWindowsSelector = NSSelectorFromString([allWindowsComponents componentsJoinedByString:@""]);
-
-    NSMethodSignature *methodSignature = [[UIWindow class] methodSignatureForSelector:allWindowsSelector];
-    NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSignature];
-
-    invocation.target = [UIWindow class];
-    invocation.selector = allWindowsSelector;
-    [invocation setArgument:&includeInternalWindows atIndex:2];
-    [invocation setArgument:&onlyVisibleWindows atIndex:3];
-    [invocation invoke];
-
-    __unsafe_unretained NSArray *windows = nil;
-    [invocation getReturnValue:&windows];
-    return windows;
-}
-
 - (UIWindow *)statusWindow
 {
     NSString *statusBarString = [NSString stringWithFormat:@"%@arWindow", @"_statusB"];
-    return [[UIApplication sharedApplication] valueForKey:statusBarString];
+    return [UIApplication.sharedApplication valueForKey:statusBarString];
 }
 
 - (void)moveButtonTapped:(FLEXToolbarItem *)sender
@@ -465,12 +441,12 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     switch (panGR.state) {
         case UIGestureRecognizerStateBegan:
             self.toolbarFrameBeforeDragging = self.explorerToolbar.frame;
-            [self updateToolbarPostionWithDragGesture:panGR];
+            [self updateToolbarPositionWithDragGesture:panGR];
             break;
             
         case UIGestureRecognizerStateChanged:
         case UIGestureRecognizerStateEnded:
-            [self updateToolbarPostionWithDragGesture:panGR];
+            [self updateToolbarPositionWithDragGesture:panGR];
             break;
             
         default:
@@ -478,20 +454,30 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
 }
 
-- (void)updateToolbarPostionWithDragGesture:(UIPanGestureRecognizer *)panGR
+- (void)updateToolbarPositionWithDragGesture:(UIPanGestureRecognizer *)panGR
 {
     CGPoint translation = [panGR translationInView:self.view];
     CGRect newToolbarFrame = self.toolbarFrameBeforeDragging;
     newToolbarFrame.origin.y += translation.y;
     
-    CGFloat maxY = CGRectGetMaxY(self.view.bounds) - newToolbarFrame.size.height;
-    if (newToolbarFrame.origin.y < 0.0) {
-        newToolbarFrame.origin.y = 0.0;
-    } else if (newToolbarFrame.origin.y > maxY) {
-        newToolbarFrame.origin.y = maxY;
+    [self updateToolbarPositionWithUnconstrainedFrame:newToolbarFrame];
+}
+
+- (void)updateToolbarPositionWithUnconstrainedFrame:(CGRect)unconstrainedFrame
+{
+    CGRect safeArea = [self viewSafeArea];
+    // We only constrain the Y-axis because We want the toolbar to handle the X-axis safeArea layout by itself
+    CGFloat minY = CGRectGetMinY(safeArea);
+    CGFloat maxY = CGRectGetMaxY(safeArea) - unconstrainedFrame.size.height;
+    if (unconstrainedFrame.origin.y < minY) {
+        unconstrainedFrame.origin.y = minY;
+    } else if (unconstrainedFrame.origin.y > maxY) {
+        unconstrainedFrame.origin.y = maxY;
     }
-    
-    self.explorerToolbar.frame = newToolbarFrame;
+
+    self.explorerToolbar.frame = unconstrainedFrame;
+
+    [[NSUserDefaults standardUserDefaults] setDouble:unconstrainedFrame.origin.y forKey:kFLEXToolbarTopMarginDefaultsKey];
 }
 
 - (void)handleToolbarHintTapGesture:(UITapGestureRecognizer *)tapGR
@@ -548,8 +534,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     
     // For outlined views and the selected view, only use visible views.
     // Outlining hidden views adds clutter and makes the selection behavior confusing.
-    NSArray *visibleViewsAtTapPoint = [self viewsAtPoint:selectionPointInWindow skipHiddenViews:YES];
-    NSMutableDictionary *newOutlineViewsForVisibleViews = [NSMutableDictionary dictionary];
+    NSArray<UIView *> *visibleViewsAtTapPoint = [self viewsAtPoint:selectionPointInWindow skipHiddenViews:YES];
+    NSMutableDictionary<NSValue *, UIView *> *newOutlineViewsForVisibleViews = [NSMutableDictionary dictionary];
     for (UIView *view in visibleViewsAtTapPoint) {
         UIView *outlineView = [self outlineViewForView:view];
         [self.view addSubview:outlineView];
@@ -569,25 +555,25 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     CGRect outlineFrame = [self frameInLocalCoordinatesForView:view];
     UIView *outlineView = [[UIView alloc] initWithFrame:outlineFrame];
-    outlineView.backgroundColor = [UIColor clearColor];
-    outlineView.layer.borderColor = [[FLEXUtility consistentRandomColorForObject:view] CGColor];
+    outlineView.backgroundColor = UIColor.clearColor;
+    outlineView.layer.borderColor = [FLEXUtility consistentRandomColorForObject:view].CGColor;
     outlineView.layer.borderWidth = 1.0;
     return outlineView;
 }
 
 - (void)removeAndClearOutlineViews
 {
-    for (id key in self.outlineViewsForVisibleViews) {
+    for (NSValue *key in self.outlineViewsForVisibleViews) {
         UIView *outlineView = self.outlineViewsForVisibleViews[key];
         [outlineView removeFromSuperview];
     }
     self.outlineViewsForVisibleViews = nil;
 }
 
-- (NSArray *)viewsAtPoint:(CGPoint)tapPointInWindow skipHiddenViews:(BOOL)skipHidden
+- (NSArray<UIView *> *)viewsAtPoint:(CGPoint)tapPointInWindow skipHiddenViews:(BOOL)skipHidden
 {
-    NSMutableArray *views = [NSMutableArray array];
-    for (UIWindow *window in [self allWindows]) {
+    NSMutableArray<UIView *> *views = [NSMutableArray array];
+    for (UIWindow *window in [FLEXUtility allWindows]) {
         // Don't include the explorer's own window or subviews.
         if (window != self.view.window && [window pointInside:tapPointInWindow withEvent:nil]) {
             [views addObject:window];
@@ -601,8 +587,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     // Select in the window that would handle the touch, but don't just use the result of hitTest:withEvent: so we can still select views with interaction disabled.
     // Default to the the application's key window if none of the windows want the touch.
-    UIWindow *windowForSelection = [[UIApplication sharedApplication] keyWindow];
-    for (UIWindow *window in [[self allWindows] reverseObjectEnumerator]) {
+    UIWindow *windowForSelection = [UIApplication.sharedApplication keyWindow];
+    for (UIWindow *window in [FLEXUtility allWindows].reverseObjectEnumerator) {
         // Ignore the explorer's own window.
         if (window != self.view.window) {
             if ([window hitTest:tapPointInWindow withEvent:nil]) {
@@ -613,12 +599,12 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
     
     // Select the deepest visible view at the tap point. This generally corresponds to what the user wants to select.
-    return [[self recursiveSubviewsAtPoint:tapPointInWindow inView:windowForSelection skipHiddenViews:YES] lastObject];
+    return [self recursiveSubviewsAtPoint:tapPointInWindow inView:windowForSelection skipHiddenViews:YES].lastObject;
 }
 
-- (NSArray *)recursiveSubviewsAtPoint:(CGPoint)pointInView inView:(UIView *)view skipHiddenViews:(BOOL)skipHidden
+- (NSArray<UIView *> *)recursiveSubviewsAtPoint:(CGPoint)pointInView inView:(UIView *)view skipHiddenViews:(BOOL)skipHidden
 {
-    NSMutableArray *subviewsAtPoint = [NSMutableArray array];
+    NSMutableArray<UIView *> *subviewsAtPoint = [NSMutableArray array];
     for (UIView *subview in view.subviews) {
         BOOL isHidden = subview.hidden || subview.alpha < 0.01;
         if (skipHidden && isHidden) {
@@ -640,9 +626,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return subviewsAtPoint;
 }
 
-- (NSArray *)allRecursiveSubviewsInView:(UIView *)view
+- (NSArray<UIView *> *)allRecursiveSubviewsInView:(UIView *)view
 {
-    NSMutableArray *subviews = [NSMutableArray array];
+    NSMutableArray<UIView *> *subviews = [NSMutableArray array];
     for (UIView *subview in view.subviews) {
         [subviews addObject:subview];
         [subviews addObjectsFromArray:[self allRecursiveSubviewsInView:subview]];
@@ -650,9 +636,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return subviews;
 }
 
-- (NSDictionary *)hierarchyDepthsForViews:(NSArray *)views
+- (NSDictionary<NSValue *, NSNumber *> *)hierarchyDepthsForViews:(NSArray<UIView *> *)views
 {
-    NSMutableDictionary *hierarchyDepths = [NSMutableDictionary dictionary];
+    NSMutableDictionary<NSValue *, NSNumber *> *hierarchyDepths = [NSMutableDictionary dictionary];
     for (UIView *view in views) {
         NSInteger depth = 0;
         UIView *tryView = view;
@@ -696,6 +682,30 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 }
 
 
+#pragma mark - Safe Area Handling
+
+- (CGRect)viewSafeArea
+{
+    CGRect safeArea = self.view.bounds;
+    if (@available(iOS 11.0, *)) {
+        safeArea = UIEdgeInsetsInsetRect(self.view.bounds, self.view.safeAreaInsets);
+    }
+
+    return safeArea;
+}
+
+- (void)viewSafeAreaInsetsDidChange
+{
+    if (@available(iOS 11.0, *)) {
+        [super viewSafeAreaInsetsDidChange];
+
+        CGRect safeArea = [self viewSafeArea];
+        CGSize toolbarSize = [self.explorerToolbar sizeThatFits:CGSizeMake(CGRectGetWidth(self.view.bounds), CGRectGetHeight(safeArea))];
+        [self updateToolbarPositionWithUnconstrainedFrame:CGRectMake(CGRectGetMinX(self.explorerToolbar.frame), CGRectGetMinY(self.explorerToolbar.frame), toolbarSize.width, toolbarSize.height)];
+    }
+}
+
+
 #pragma mark - Touch Handling
 
 - (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates
@@ -734,7 +744,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     // Note that we need to wait until the view controller is dismissed to calculated the frame of the outline view.
     // Otherwise the coordinate conversion doesn't give the correct result.
-    [self resignKeyAndDismissViewControllerAnimated:YES completion:^{
+    [self toggleViewsToolWithCompletion:^{
         // If the selected view is outside of the tap point array (selected from "Full Hierarchy"),
         // then clear out the tap point array and remove all the outline views.
         if (![self.viewsAtTapPoint containsObject:selectedView]) {
@@ -774,20 +784,28 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 - (void)makeKeyAndPresentViewController:(UIViewController *)viewController animated:(BOOL)animated completion:(void (^)(void))completion
 {
     // Save the current key window so we can restore it following dismissal.
-    self.previousKeyWindow = [[UIApplication sharedApplication] keyWindow];
-    
+    self.previousKeyWindow = UIApplication.sharedApplication.keyWindow;
+
     // Make our window key to correctly handle input.
     [self.view.window makeKeyWindow];
-    
+
+    // Fix for iOS 13, regarding custom UIMenu callouts not appearing because
+    // the UITextEffectsWindow has a lower level than the FLEX window by default
+    // until a text field is activated, bringing it above the FLEX window.
+    if (@available(iOS 13, *)) {
+        for (UIWindow *window in UIApplication.sharedApplication.windows) {
+            if ([window isKindOfClass:NSClassFromString(@"UITextEffectsWindow")]) {
+                if (window.windowLevel <= self.view.window.windowLevel) {
+                    window.windowLevel = self.view.window.windowLevel + 1;
+                    break;
+                }
+            }
+        }
+    }
+
     // Move the status bar on top of FLEX so we can get scroll to top behavior for taps.
     [[self statusWindow] setWindowLevel:self.view.window.windowLevel + 1.0];
     
-    // If this app doesn't use view controller based status bar management and we're on iOS 7+,
-    // make sure the status bar style is UIStatusBarStyleDefault. We don't actully have to check
-    // for view controller based management because the global methods no-op if that is turned on.
-    self.previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle];
-    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
-    
     // Show the view controller.
     [self presentViewController:viewController animated:animated completion:completion];
 }
@@ -803,9 +821,6 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     // We want it above FLEX while a modal is presented for scroll to top, but below FLEX otherwise for exploration.
     [[self statusWindow] setWindowLevel:UIWindowLevelStatusBar];
     
-    // Restore the stauts bar style if the app is using global status bar management.
-    [[UIApplication sharedApplication] setStatusBarStyle:self.previousStatusBarStyle];
-    
     [self dismissViewControllerAnimated:animated completion:completion];
 }
 
@@ -814,6 +829,15 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return self.previousKeyWindow != nil;
 }
 
+- (void)toggleToolWithViewControllerProvider:(UIViewController *(^)(void))future completion:(void(^)(void))completion
+{
+    if (self.presentedViewController) {
+        [self resignKeyAndDismissViewControllerAnimated:YES completion:completion];
+    } else if (future) {
+        [self makeKeyAndPresentViewController:future() animated:YES completion:completion];
+    }
+}
+
 #pragma mark - Keyboard Shortcut Helpers
 
 - (void)toggleSelectTool
@@ -836,44 +860,41 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)toggleViewsTool
 {
-    BOOL viewsModalShown = [[self presentedViewController] isKindOfClass:[UINavigationController class]];
-    viewsModalShown = viewsModalShown && [[[(UINavigationController *)[self presentedViewController] viewControllers] firstObject] isKindOfClass:[FLEXHierarchyTableViewController class]];
-    if (viewsModalShown) {
-        [self resignKeyAndDismissViewControllerAnimated:YES completion:nil];
-    } else {
-        [self resignKeyAndDismissViewControllerAnimated:NO completion:nil];
-        NSArray *allViews = [self allViewsInHierarchy];
+    [self toggleViewsToolWithCompletion:nil];
+}
+
+- (void)toggleViewsToolWithCompletion:(void(^)(void))completion
+{
+    [self toggleToolWithViewControllerProvider:^UIViewController *{
+        NSArray<UIView *> *allViews = [self allViewsInHierarchy];
         NSDictionary *depthsForViews = [self hierarchyDepthsForViews:allViews];
         FLEXHierarchyTableViewController *hierarchyTVC = [[FLEXHierarchyTableViewController alloc] initWithViews:allViews viewsAtTap:self.viewsAtTapPoint selectedView:self.selectedView depths:depthsForViews];
         hierarchyTVC.delegate = self;
-        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:hierarchyTVC];
-        [self makeKeyAndPresentViewController:navigationController animated:YES completion:nil];
-    }
+        return [[UINavigationController alloc] initWithRootViewController:hierarchyTVC];
+    } completion:^{
+        if (completion) {
+            completion();
+        }
+    }];
 }
 
 - (void)toggleMenuTool
 {
-    BOOL menuModalShown = [[self presentedViewController] isKindOfClass:[UINavigationController class]];
-    menuModalShown = menuModalShown && [[[(UINavigationController *)[self presentedViewController] viewControllers] firstObject] isKindOfClass:[FLEXGlobalsTableViewController class]];
-    if (menuModalShown) {
-        [self resignKeyAndDismissViewControllerAnimated:YES completion:nil];
-    } else {
-        [self resignKeyAndDismissViewControllerAnimated:NO completion:nil];
-        FLEXGlobalsTableViewController *globalsViewController = [[FLEXGlobalsTableViewController alloc] init];
+    [self toggleToolWithViewControllerProvider:^UIViewController *{
+        FLEXGlobalsTableViewController *globalsViewController = [FLEXGlobalsTableViewController new];
         globalsViewController.delegate = self;
-        [FLEXGlobalsTableViewController setApplicationWindow:[[UIApplication sharedApplication] keyWindow]];
-        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:globalsViewController];
-        [self makeKeyAndPresentViewController:navigationController animated:YES completion:nil];
-    }
+        [FLEXGlobalsTableViewController setApplicationWindow:[UIApplication.sharedApplication keyWindow]];
+        return [[UINavigationController alloc] initWithRootViewController:globalsViewController];
+    } completion:nil];
 }
 
 - (void)handleDownArrowKeyPressed
 {
     if (self.currentMode == FLEXExplorerModeMove) {
         CGRect frame = self.selectedView.frame;
-        frame.origin.y += 1.0 / [[UIScreen mainScreen] scale];
+        frame.origin.y += 1.0 / UIScreen.mainScreen.scale;
         self.selectedView.frame = frame;
-    } else if (self.currentMode == FLEXExplorerModeSelect && [self.viewsAtTapPoint count] > 0) {
+    } else if (self.currentMode == FLEXExplorerModeSelect && self.viewsAtTapPoint.count > 0) {
         NSInteger selectedViewIndex = [self.viewsAtTapPoint indexOfObject:self.selectedView];
         if (selectedViewIndex > 0) {
             self.selectedView = [self.viewsAtTapPoint objectAtIndex:selectedViewIndex - 1];
@@ -885,11 +906,11 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     if (self.currentMode == FLEXExplorerModeMove) {
         CGRect frame = self.selectedView.frame;
-        frame.origin.y -= 1.0 / [[UIScreen mainScreen] scale];
+        frame.origin.y -= 1.0 / UIScreen.mainScreen.scale;
         self.selectedView.frame = frame;
-    } else if (self.currentMode == FLEXExplorerModeSelect && [self.viewsAtTapPoint count] > 0) {
+    } else if (self.currentMode == FLEXExplorerModeSelect && self.viewsAtTapPoint.count > 0) {
         NSInteger selectedViewIndex = [self.viewsAtTapPoint indexOfObject:self.selectedView];
-        if (selectedViewIndex < [self.viewsAtTapPoint count] - 1) {
+        if (selectedViewIndex < self.viewsAtTapPoint.count - 1) {
             self.selectedView = [self.viewsAtTapPoint objectAtIndex:selectedViewIndex + 1];
         }
     }
@@ -899,7 +920,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     if (self.currentMode == FLEXExplorerModeMove) {
         CGRect frame = self.selectedView.frame;
-        frame.origin.x += 1.0 / [[UIScreen mainScreen] scale];
+        frame.origin.x += 1.0 / UIScreen.mainScreen.scale;
         self.selectedView.frame = frame;
     }
 }
@@ -908,7 +929,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     if (self.currentMode == FLEXExplorerModeMove) {
         CGRect frame = self.selectedView.frame;
-        frame.origin.x -= 1.0 / [[UIScreen mainScreen] scale];
+        frame.origin.x -= 1.0 / UIScreen.mainScreen.scale;
         self.selectedView.frame = frame;
     }
 }

Classes/ExplorerInterface/FLEXWindow.m

@@ -15,7 +15,7 @@
 {
     self = [super initWithFrame:frame];
     if (self) {
-        self.backgroundColor = [UIColor clearColor];
+        self.backgroundColor = UIColor.clearColor;
         // Some apps have windows at UIWindowLevelStatusBar + n.
         // If we make the window level too high, we block out UIAlertViews.
         // There's a balance between staying above the app's windows and staying below alerts.
@@ -49,7 +49,7 @@
     // This adds a method (superclass override) at runtime which gives us the status bar behavior we want.
     // The FLEX window is intended to be an overlay that generally doesn't affect the app underneath.
     // Most of the time, we want the app's main window(s) to be in control of status bar behavior.
-    // Done at runtime with an obfuscated selector because it is private API. But you shoudn't ship this to the App Store anyways...
+    // Done at runtime with an obfuscated selector because it is private API. But you shouldn't ship this to the App Store anyways...
     NSString *canAffectSelectorString = [@[@"_can", @"Affect", @"Status", @"Bar", @"Appearance"] componentsJoinedByString:@""];
     SEL canAffectSelector = NSSelectorFromString(canAffectSelectorString);
     Method shouldAffectMethod = class_getInstanceMethod(self, @selector(shouldAffectStatusBarAppearance));

Classes/ExplorerToolbar/FLEXManager+Private.h

@@ -1,16 +0,0 @@
-//
-//  FLEXManager+Private.h
-//  PebbleApp
-//
-//  Created by Javier Soto on 7/26/14.
-//  Copyright (c) 2014 Pebble Technology. All rights reserved.
-//
-
-#import "FLEXManager.h"
-
-@interface FLEXManager ()
-
-/// An array of FLEXGlobalsTableViewControllerEntry objects that have been registered by the user.
-@property (nonatomic, readonly, strong) NSArray *userGlobalEntries;
-
-@end

Classes/FLEX.h

@@ -6,12 +6,4 @@
 //  Copyright (c) 2015 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
-
-//! Project version number for FLEX.
-FOUNDATION_EXPORT double FLEXVersionNumber;
-
-//! Project version string for FLEX.
-FOUNDATION_EXPORT const unsigned char FLEXVersionString[];
-
 #import <FLEX/FLEXManager.h>

Classes/FLEXManager.h

@@ -9,6 +9,12 @@
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
+#if !FLEX_AT_LEAST_IOS13_SDK
+@class UIWindowScene;
+#endif
+
+typedef UIViewController *(^FLEXCustomContentViewerFuture)(NSData *data);
+
 @interface FLEXManager : NSObject
 
 + (instancetype)sharedManager;
@@ -19,16 +25,26 @@
 - (void)hideExplorer;
 - (void)toggleExplorer;
 
+/// Use this to present the explorer in a specific scene when the one
+/// it chooses by default is not the one you wish to display it in.
+- (void)showExplorerFromScene:(UIWindowScene *)scene API_AVAILABLE(ios(13.0));
+
 #pragma mark - Network Debugging
 
 /// If this property is set to YES, FLEX will swizzle NSURLConnection*Delegate and NSURLSession*Delegate methods
 /// on classes that conform to the protocols. This allows you to view network activity history from the main FLEX menu.
-/// Full responses are kept temporarily in a size limited cache and may be pruged under memory pressure.
-@property (nonatomic, assign, getter=isNetworkDebuggingEnabled) BOOL networkDebuggingEnabled;
+/// Full responses are kept temporarily in a size-limited cache and may be pruned under memory pressure.
+@property (nonatomic, getter=isNetworkDebuggingEnabled) BOOL networkDebuggingEnabled;
 
-/// Defaults to 25 MB if never set. Values set here are presisted across launches of the app.
+/// Defaults to 25 MB if never set. Values set here are persisted across launches of the app.
 /// The response cache uses an NSCache, so it may purge prior to hitting the limit when the app is under memory pressure.
-@property (nonatomic, assign) NSUInteger networkResponseCacheByteLimit;
+@property (nonatomic) NSUInteger networkResponseCacheByteLimit;
+
+/// Requests whose host ends with one of the blacklisted entries in this array will be not be recorded (eg. google.com).
+/// Wildcard or subdomain entries are not required (eg. google.com will match any subdomain under google.com).
+/// Useful to remove requests that are typically noisy, such as analytics requests that you aren't interested in tracking.
+@property (nonatomic, copy) NSArray<NSString *> *networkRequestHostBlacklist;
+
 
 #pragma mark - Keyboard Shortcuts
 
@@ -36,7 +52,7 @@
 /// The shortcuts will not fire when there is an active text field, text view, or other responder accepting key input.
 /// You can disable keyboard shortcuts if you have existing keyboard shortcuts that conflict with FLEX, or if you like doing things the hard way ;)
 /// Keyboard shortcuts are always disabled (and support is compiled out) in non-simulator builds
-@property (nonatomic, assign) BOOL simulatorShortcutsEnabled;
+@property (nonatomic) BOOL simulatorShortcutsEnabled;
 
 /// Adds an action to run when the specified key & modifier combination is pressed
 /// @param key A single character string matching a key on the keyboard
@@ -49,6 +65,10 @@
 
 #pragma mark - Extensions
 
+/// Default database password is @c nil by default.
+/// Set this to the password you want the databases to open with.
+@property (copy, nonatomic) NSString *defaultSqliteDatabasePassword;
+
 /// Adds an entry at the bottom of the list of Global State items. Call this method before this view controller is displayed.
 /// @param entryName The string to be displayed in the cell.
 /// @param objectFutureBlock When you tap on the row, information about the object returned by this block will be displayed.
@@ -67,4 +87,13 @@
 - (void)registerGlobalEntryWithName:(NSString *)entryName
           viewControllerFutureBlock:(UIViewController * (^)(void))viewControllerFutureBlock;
 
+/// Sets custom viewer for specific content type.
+/// @param contentType Mime type like application/json
+/// @param viewControllerFutureBlock Viewer (view controller) creation block
+/// @note This method must be called from the main thread.
+/// The viewControllerFutureBlock will be invoked from the main thread and may not return nil.
+/// @note The passed block will be copied and retain for the duration of the application, you may want to use __weak references.
+- (void)setCustomViewerForContentType:(NSString *)contentType
+            viewControllerFutureBlock:(FLEXCustomContentViewerFuture)viewControllerFutureBlock;
+
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXDatabaseManager.h

@@ -0,0 +1,26 @@
+//
+//  PTDatabaseManager.h
+//  Derived from:
+//
+//  FMDatabase.h
+//  FMDB( https://github.com/ccgus/fmdb )
+//
+//  Created by Peng Tao on 15/11/23.
+//
+//  Licensed to Flying Meat Inc. under one or more contributor license agreements.
+//  See the LICENSE file distributed with this work for the terms under
+//  which Flying Meat Inc. licenses this file to you.
+
+#import <Foundation/Foundation.h>
+
+@protocol FLEXDatabaseManager <NSObject>
+
+@required
+- (instancetype)initWithPath:(NSString*)path;
+
+- (BOOL)open;
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables;
+- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName;
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXMultiColumnTableView.h

@@ -0,0 +1,48 @@
+//
+//  PTMultiColumnTableView.h
+//  PTMultiColumnTableViewDemo
+//
+//  Created by Peng Tao on 15/11/16.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "FLEXTableColumnHeader.h"
+
+@class FLEXMultiColumnTableView;
+
+@protocol FLEXMultiColumnTableViewDelegate <NSObject>
+
+@required
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapLabelWithText:(NSString *)text;
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapHeaderWithText:(NSString *)text sortType:(FLEXTableColumnHeaderSortType)sortType;
+
+@end
+
+@protocol FLEXMultiColumnTableViewDataSource <NSObject>
+
+@required
+
+- (NSInteger)numberOfColumnsInTableView:(FLEXMultiColumnTableView *)tableView;
+- (NSInteger)numberOfRowsInTableView:(FLEXMultiColumnTableView *)tableView;
+- (NSString *)columnNameInColumn:(NSInteger)column;
+- (NSString *)rowNameInRow:(NSInteger)row;
+- (NSString *)contentAtColumn:(NSInteger)column row:(NSInteger)row;
+- (NSArray *)contentAtRow:(NSInteger)row;
+
+- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView widthForContentCellInColumn:(NSInteger)column;
+- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView heightForContentCellInRow:(NSInteger)row;
+- (CGFloat)heightForTopHeaderInTableView:(FLEXMultiColumnTableView *)tableView;
+- (CGFloat)widthForLeftHeaderInTableView:(FLEXMultiColumnTableView *)tableView;
+
+@end
+
+
+@interface FLEXMultiColumnTableView : UIView
+
+@property (nonatomic, weak) id<FLEXMultiColumnTableViewDataSource>dataSource;
+@property (nonatomic, weak) id<FLEXMultiColumnTableViewDelegate>delegate;
+
+- (void)reloadData;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXMultiColumnTableView.m

@@ -0,0 +1,346 @@
+//
+//  PTMultiColumnTableView.m
+//  PTMultiColumnTableViewDemo
+//
+//  Created by Peng Tao on 15/11/16.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import "FLEXMultiColumnTableView.h"
+#import "FLEXTableContentCell.h"
+#import "FLEXTableLeftCell.h"
+
+@interface FLEXMultiColumnTableView ()
+<UITableViewDataSource, UITableViewDelegate,UIScrollViewDelegate, FLEXTableContentCellDelegate>
+
+@property (nonatomic) UIScrollView *contentScrollView;
+@property (nonatomic) UIScrollView *headerScrollView;
+@property (nonatomic) UITableView  *leftTableView;
+@property (nonatomic) UITableView  *contentTableView;
+@property (nonatomic) UIView       *leftHeader;
+
+@property (nonatomic) NSDictionary<NSString *, NSNumber *> *sortStatusDict;
+@property (nonatomic) NSArray *rowData;
+@end
+
+static const CGFloat kColumnMargin = 1;
+
+@implementation FLEXMultiColumnTableView
+
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        [self loadUI];
+    }
+    return self;
+}
+
+- (void)didMoveToSuperview
+{
+    [super didMoveToSuperview];
+    [self reloadData];
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    CGFloat width  = self.frame.size.width;
+    CGFloat height = self.frame.size.height;
+    CGFloat topheaderHeight = [self topHeaderHeight];
+    CGFloat leftHeaderWidth = [self leftHeaderWidth];
+    CGFloat topInsets = 0.f;
+
+    if (@available (iOS 11.0, *)) {
+        topInsets = self.safeAreaInsets.top;
+    }
+    
+    CGFloat contentWidth = 0.0;
+    NSInteger rowsCount = [self numberOfColumns];
+    for (int i = 0; i < rowsCount; i++) {
+        contentWidth += [self contentWidthForColumn:i];
+    }
+    
+    self.leftTableView.frame           = CGRectMake(0, topheaderHeight + topInsets, leftHeaderWidth, height - topheaderHeight - topInsets);
+    self.headerScrollView.frame        = CGRectMake(leftHeaderWidth, topInsets, width - leftHeaderWidth, topheaderHeight);
+    self.headerScrollView.contentSize  = CGSizeMake( self.contentTableView.frame.size.width, self.headerScrollView.frame.size.height);
+    self.contentTableView.frame        = CGRectMake(0, 0, contentWidth + [self numberOfColumns] * [self columnMargin] , height - topheaderHeight - topInsets);
+    self.contentScrollView.frame       = CGRectMake(leftHeaderWidth, topheaderHeight + topInsets, width - leftHeaderWidth, height - topheaderHeight - topInsets);
+    self.contentScrollView.contentSize = self.contentTableView.frame.size;
+    self.leftHeader.frame              = CGRectMake(0, topInsets, [self leftHeaderWidth], [self topHeaderHeight]);
+}
+
+
+- (void)loadUI
+{
+    [self loadHeaderScrollView];
+    [self loadContentScrollView];
+    [self loadLeftView];
+}
+
+- (void)reloadData
+{
+    [self loadLeftViewData];
+    [self loadContentData];
+    [self loadHeaderData];
+}
+
+#pragma mark - UI
+
+- (void)loadHeaderScrollView
+{
+    UIScrollView *headerScrollView = [UIScrollView new];
+    headerScrollView.delegate      = self;
+    self.headerScrollView          = headerScrollView;
+    self.headerScrollView.backgroundColor =  [UIColor colorWithWhite:0.803 alpha:0.850];
+    
+    [self addSubview:headerScrollView];
+}
+
+- (void)loadContentScrollView
+{
+    
+    UIScrollView *scrollView = [UIScrollView new];
+    scrollView.bounces       = NO;
+    scrollView.delegate      = self;
+    
+    UITableView *tableView   = [UITableView new];
+    tableView.delegate       = self;
+    tableView.dataSource     = self;
+    tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    
+    [self addSubview:scrollView];
+    [scrollView addSubview:tableView];
+    
+    self.contentScrollView = scrollView;
+    self.contentTableView    = tableView;
+    
+}
+
+- (void)loadLeftView
+{
+    UITableView *leftTableView = [UITableView new];
+    leftTableView.delegate       = self;
+    leftTableView.dataSource     = self;
+    leftTableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    self.leftTableView           = leftTableView;
+    [self addSubview:leftTableView];
+    
+    UIView *leftHeader = [UIView new];
+    leftHeader.backgroundColor = [UIColor colorWithWhite:0.950 alpha:0.668];
+    self.leftHeader            = leftHeader;
+    [self addSubview:leftHeader];
+    
+}
+
+
+#pragma mark - Data
+
+- (void)loadHeaderData
+{
+    NSArray<UIView *> *subviews = self.headerScrollView.subviews;
+    
+    for (UIView *subview in subviews) {
+        [subview removeFromSuperview];
+    }
+    CGFloat x = 0.0;
+    CGFloat w = 0.0;
+    for (int i = 0; i < [self numberOfColumns] ; i++) {
+        w = [self contentWidthForColumn:i] + [self columnMargin];
+        
+        FLEXTableColumnHeader *cell = [[FLEXTableColumnHeader alloc] initWithFrame:CGRectMake(x, 0, w, [self topHeaderHeight] - 1)];
+        cell.label.text = [self columnTitleForColumn:i];
+        [self.headerScrollView addSubview:cell];
+        
+        FLEXTableColumnHeaderSortType type = [self.sortStatusDict[[self columnTitleForColumn:i]] integerValue];
+        [cell changeSortStatusWithType:type];
+        
+        UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self
+                                                                                  action:@selector(contentHeaderTap:)];
+        [cell addGestureRecognizer:gesture];
+        cell.userInteractionEnabled = YES;
+        
+        x = x + w;
+    }
+}
+
+- (void)contentHeaderTap:(UIGestureRecognizer *)gesture
+{
+    FLEXTableColumnHeader *header = (FLEXTableColumnHeader *)gesture.view;
+    NSString *string = header.label.text;
+    FLEXTableColumnHeaderSortType currentType = [self.sortStatusDict[string] integerValue];
+    FLEXTableColumnHeaderSortType newType ;
+    
+    switch (currentType) {
+        case FLEXTableColumnHeaderSortTypeNone:
+            newType = FLEXTableColumnHeaderSortTypeAsc;
+            break;
+        case FLEXTableColumnHeaderSortTypeAsc:
+            newType = FLEXTableColumnHeaderSortTypeDesc;
+            break;
+        case FLEXTableColumnHeaderSortTypeDesc:
+            newType = FLEXTableColumnHeaderSortTypeAsc;
+            break;
+    }
+    
+    self.sortStatusDict = @{header.label.text : @(newType)};
+    [header changeSortStatusWithType:newType];
+    [self.delegate multiColumnTableView:self didTapHeaderWithText:string sortType:newType];
+    
+}
+
+- (void)loadContentData
+{
+    [self.contentTableView reloadData];
+}
+
+- (void)loadLeftViewData
+{
+    [self.leftTableView reloadData];
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView
+         cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    UIColor *backgroundColor = UIColor.whiteColor;
+    if (indexPath.row % 2 != 0) {
+        backgroundColor = [UIColor colorWithWhite:0.950 alpha:0.750];
+    }
+    
+    if (tableView != self.leftTableView) {
+        self.rowData = [self.dataSource contentAtRow:indexPath.row];
+        FLEXTableContentCell *cell = [FLEXTableContentCell cellWithTableView:tableView
+                                                                columnNumber:[self numberOfColumns]];
+        cell.contentView.backgroundColor = backgroundColor;
+        cell.delegate = self;
+        
+        for (int i = 0 ; i < cell.labels.count; i++) {
+            
+            UILabel *label  = cell.labels[i];
+            label.textColor = UIColor.blackColor;
+            
+            NSString *content = [NSString stringWithFormat:@"%@",self.rowData[i]];
+            if ([content isEqualToString:@"<null>"]) {
+                label.textColor = UIColor.lightGrayColor;
+                content = @"NULL";
+            }
+            label.text            = content;
+            label.backgroundColor = backgroundColor;
+        }
+        return cell;
+    }
+    else {
+        FLEXTableLeftCell *cell          = [FLEXTableLeftCell cellWithTableView:tableView];
+        cell.contentView.backgroundColor = backgroundColor;
+        cell.titlelabel.text             = [self rowTitleForRow:indexPath.row];
+        return cell;
+    }
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return [self.dataSource numberOfRowsInTableView:self];
+}
+
+
+- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    return [self.dataSource multiColumnTableView:self heightForContentCellInRow:indexPath.row];
+}
+
+
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView
+{
+    if (scrollView == self.contentScrollView) {
+        self.headerScrollView.contentOffset = scrollView.contentOffset;
+    }
+    else if (scrollView == self.headerScrollView) {
+        self.contentScrollView.contentOffset = scrollView.contentOffset;
+    }
+    else if (scrollView == self.leftTableView) {
+        self.contentTableView.contentOffset = scrollView.contentOffset;
+    }
+    else if (scrollView == self.contentTableView) {
+        self.leftTableView.contentOffset = scrollView.contentOffset;
+    }
+}
+
+#pragma mark -
+#pragma mark UITableView Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (tableView == self.leftTableView) {
+        [self.contentTableView selectRowAtIndexPath:indexPath
+                                           animated:NO
+                                     scrollPosition:UITableViewScrollPositionNone];
+    }
+    else if (tableView == self.contentTableView) {
+        [self.leftTableView selectRowAtIndexPath:indexPath
+                                        animated:NO
+                                  scrollPosition:UITableViewScrollPositionNone];
+    }
+}
+
+#pragma mark -
+#pragma mark DataSource Accessor
+
+- (NSInteger)numberOfRows
+{
+    return [self.dataSource numberOfRowsInTableView:self];
+}
+
+- (NSInteger)numberOfColumns
+{
+    return [self.dataSource numberOfColumnsInTableView:self];
+}
+
+- (NSString *)columnTitleForColumn:(NSInteger)column
+{
+    return [self.dataSource columnNameInColumn:column];
+}
+
+- (NSString *)rowTitleForRow:(NSInteger)row
+{
+    return [self.dataSource rowNameInRow:row];
+}
+
+- (NSString *)contentAtColumn:(NSInteger)column row:(NSInteger)row;
+{
+    return [self.dataSource contentAtColumn:column row:row];
+}
+
+- (CGFloat)contentWidthForColumn:(NSInteger)column
+{
+    return [self.dataSource multiColumnTableView:self widthForContentCellInColumn:column];
+}
+
+- (CGFloat)contentHeightForRow:(NSInteger)row
+{
+    return [self.dataSource multiColumnTableView:self heightForContentCellInRow:row];
+}
+
+- (CGFloat)topHeaderHeight
+{
+    return [self.dataSource heightForTopHeaderInTableView:self];
+}
+
+- (CGFloat)leftHeaderWidth
+{
+    return [self.dataSource widthForLeftHeaderInTableView:self];
+}
+
+- (CGFloat)columnMargin
+{
+    return kColumnMargin;
+}
+
+
+- (void)tableContentCell:(FLEXTableContentCell *)tableView labelDidTapWithText:(NSString *)text
+{
+    [self.delegate multiColumnTableView:self didTapLabelWithText:text];
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXRealmDatabaseManager.h

@@ -0,0 +1,14 @@
+//
+//  FLEXRealmDatabaseManager.h
+//  FLEX
+//
+//  Created by Tim Oliver on 28/01/2016.
+//  Copyright © 2016 Realm. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "FLEXDatabaseManager.h"
+
+@interface FLEXRealmDatabaseManager : NSObject <FLEXDatabaseManager>
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXRealmDatabaseManager.m

@@ -0,0 +1,114 @@
+//
+//  FLEXRealmDatabaseManager.m
+//  FLEX
+//
+//  Created by Tim Oliver on 28/01/2016.
+//  Copyright © 2016 Realm. All rights reserved.
+//
+
+#import "FLEXRealmDatabaseManager.h"
+
+#if __has_include(<Realm/Realm.h>)
+#import <Realm/Realm.h>
+#import <Realm/RLMRealm_Dynamic.h>
+#else
+#import "FLEXRealmDefines.h"
+#endif
+
+@interface FLEXRealmDatabaseManager ()
+
+@property (nonatomic, copy) NSString *path;
+@property (nonatomic) RLMRealm * realm;
+
+@end
+
+//#endif
+
+@implementation FLEXRealmDatabaseManager
+
+- (instancetype)initWithPath:(NSString*)aPath
+{
+    Class realmClass = NSClassFromString(@"RLMRealm");
+    if (realmClass == nil) {
+        return nil;
+    }
+    
+    self = [super init];
+    
+    if (self) {
+        _path = aPath;
+    }
+    return self;
+}
+
+- (BOOL)open
+{
+    Class realmClass = NSClassFromString(@"RLMRealm");
+    Class configurationClass = NSClassFromString(@"RLMRealmConfiguration");
+    
+    if (realmClass == nil || configurationClass == nil) {
+        return NO;
+    }
+    
+    NSError *error = nil;
+    id configuration = [configurationClass new];
+    [(RLMRealmConfiguration *)configuration setFileURL:[NSURL fileURLWithPath:self.path]];
+    self.realm = [realmClass realmWithConfiguration:configuration error:&error];
+    return (error == nil);
+}
+
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables
+{
+    NSMutableArray<NSDictionary<NSString *, id> *> *allTables = [NSMutableArray array];
+    RLMSchema *schema = [self.realm schema];
+    
+    for (RLMObjectSchema *objectSchema in schema.objectSchema) {
+        if (objectSchema.className == nil) {
+            continue;
+        }
+        
+        NSDictionary<NSString *, id> *dictionary = @{@"name":objectSchema.className};
+        [allTables addObject:dictionary];
+    }
+    
+    return allTables;
+}
+
+- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName
+{
+    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
+    if (objectSchema == nil) {
+        return nil;
+    }
+    
+    NSMutableArray<NSString *> *columnNames = [NSMutableArray array];
+    for (RLMProperty *property in objectSchema.properties) {
+        [columnNames addObject:property.name];
+    }
+    
+    return columnNames;
+}
+
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName
+{
+    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
+    RLMResults *results = [self.realm allObjects:tableName];
+    if (results.count == 0 || objectSchema == nil) {
+        return nil;
+    }
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *allDataEntries = [NSMutableArray array];
+    for (RLMObject *result in results) {
+        NSMutableDictionary<NSString *, id> *entry = [NSMutableDictionary dictionary];
+        for (RLMProperty *property in objectSchema.properties) {
+            id value = [result valueForKey:property.name];
+            entry[property.name] = (value) ? (value) : [NSNull null];
+        }
+        
+        [allDataEntries addObject:entry];
+    }
+    
+    return allDataEntries;
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXRealmDefines.h

@@ -0,0 +1,46 @@
+//
+//  Realm.h
+//  FLEX
+//
+//  Created by Tim Oliver on 16/02/2016.
+//  Copyright © 2016 Realm. All rights reserved.
+//
+
+#if __has_include(<Realm/Realm.h>)
+#else
+
+@class RLMObject, RLMResults, RLMRealm, RLMRealmConfiguration, RLMSchema, RLMObjectSchema, RLMProperty;
+
+@interface RLMRealmConfiguration : NSObject
+@property (nonatomic, copy) NSURL *fileURL;
+@end
+
+@interface RLMRealm : NSObject
+@property (nonatomic, readonly) RLMSchema *schema;
++ (RLMRealm *)realmWithConfiguration:(RLMRealmConfiguration *)configuration error:(NSError **)error;
+- (RLMResults *)allObjects:(NSString *)className;
+@end
+
+@interface RLMSchema : NSObject
+@property (nonatomic, readonly) NSArray<RLMObjectSchema *> *objectSchema;
+- (RLMObjectSchema *)schemaForClassName:(NSString *)className;
+@end
+
+@interface RLMObjectSchema : NSObject
+@property (nonatomic, readonly) NSString *className;
+@property (nonatomic, readonly) NSArray<RLMProperty *> *properties;
+@end
+
+@interface RLMProperty : NSString
+@property (nonatomic, readonly) NSString *name;
+@end
+
+@interface RLMResults : NSObject <NSFastEnumeration>
+@property (nonatomic, readonly) NSInteger count;
+@end
+
+@interface RLMObject : NSObject
+
+@end
+
+#endif

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLiteDatabaseManager.h

@@ -0,0 +1,19 @@
+//
+//  PTDatabaseManager.h
+//  Derived from:
+//
+//  FMDatabase.h
+//  FMDB( https://github.com/ccgus/fmdb )
+//
+//  Created by Peng Tao on 15/11/23.
+//
+//  Licensed to Flying Meat Inc. under one or more contributor license agreements.
+//  See the LICENSE file distributed with this work for the terms under
+//  which Flying Meat Inc. licenses this file to you.
+
+#import <Foundation/Foundation.h>
+#import "FLEXDatabaseManager.h"
+
+@interface FLEXSQLiteDatabaseManager : NSObject <FLEXDatabaseManager>
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLiteDatabaseManager.m

@@ -0,0 +1,203 @@
+//
+//  PTDatabaseManager.m
+//  PTDatabaseReader
+//
+//  Created by Peng Tao on 15/11/23.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import "FLEXSQLiteDatabaseManager.h"
+#import "FLEXManager.h"
+#import <sqlite3.h>
+
+
+static NSString *const QUERY_TABLENAMES_SQL = @"SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
+
+@implementation FLEXSQLiteDatabaseManager
+{
+    sqlite3* _db;
+    NSString* _databasePath;
+}
+
+- (instancetype)initWithPath:(NSString*)aPath
+{
+    self = [super init];
+    
+    if (self) {
+        _databasePath = [aPath copy];
+    }
+    return self;
+}
+
+- (BOOL)open {
+    if (_db) {
+        return YES;
+    }
+    int err = sqlite3_open(_databasePath.UTF8String, &_db);
+
+#if SQLITE_HAS_CODEC
+    NSString *defaultSqliteDatabasePassword = [FLEXManager sharedManager].defaultSqliteDatabasePassword;
+
+    if (defaultSqliteDatabasePassword) {
+        const char *key = defaultSqliteDatabasePassword.UTF8String;
+
+        sqlite3_key(_db, key, (int)strlen(key));
+    }
+#endif
+
+    if(err != SQLITE_OK) {
+        NSLog(@"error opening!: %d", err);
+        return NO;
+    }
+    return YES;
+}
+
+- (BOOL)close {
+    if (!_db) {
+        return YES;
+    }
+    
+    int  rc;
+    BOOL retry;
+    BOOL triedFinalizingOpenStatements = NO;
+    
+    do {
+        retry   = NO;
+        rc      = sqlite3_close(_db);
+        if (SQLITE_BUSY == rc || SQLITE_LOCKED == rc) {
+            if (!triedFinalizingOpenStatements) {
+                triedFinalizingOpenStatements = YES;
+                sqlite3_stmt *pStmt;
+                while ((pStmt = sqlite3_next_stmt(_db, nil)) !=0) {
+                    NSLog(@"Closing leaked statement");
+                    sqlite3_finalize(pStmt);
+                    retry = YES;
+                }
+            }
+        }
+        else if (SQLITE_OK != rc) {
+            NSLog(@"error closing!: %d", rc);
+        }
+    }
+    while (retry);
+    
+    _db = nil;
+    return YES;
+}
+
+
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables
+{
+    return [self executeQuery:QUERY_TABLENAMES_SQL];
+}
+
+- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName
+{
+    NSString *sql = [NSString stringWithFormat:@"PRAGMA table_info('%@')",tableName];
+    NSArray<NSDictionary<NSString *, id> *> *resultArray =  [self executeQuery:sql];
+    NSMutableArray<NSString *> *array = [NSMutableArray array];
+    for (NSDictionary<NSString *, id> *dict in resultArray) {
+        NSString *columnName = (NSString *)dict[@"name"] ?: @"";
+        [array addObject:columnName];
+    }
+    return array;
+}
+
+- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName
+{
+    NSString *sql = [NSString stringWithFormat:@"SELECT * FROM %@",tableName];
+    return [self executeQuery:sql];
+}
+
+#pragma mark -
+#pragma mark - Private
+
+- (NSArray<NSDictionary<NSString *, id> *> *)executeQuery:(NSString *)sql
+{
+    [self open];
+    NSMutableArray<NSDictionary<NSString *, id> *> *resultArray = [NSMutableArray array];
+    sqlite3_stmt *pstmt;
+    if (sqlite3_prepare_v2(_db, sql.UTF8String, -1, &pstmt, 0) == SQLITE_OK) {
+        while (sqlite3_step(pstmt) == SQLITE_ROW) {
+            NSUInteger num_cols = (NSUInteger)sqlite3_data_count(pstmt);
+            if (num_cols > 0) {
+                NSMutableDictionary<NSString *, id> *dict = [NSMutableDictionary dictionaryWithCapacity:num_cols];
+                
+                int columnCount = sqlite3_column_count(pstmt);
+                
+                int columnIdx = 0;
+                for (columnIdx = 0; columnIdx < columnCount; columnIdx++) {
+                    
+                    NSString *columnName = [NSString stringWithUTF8String:sqlite3_column_name(pstmt, columnIdx)];
+                    id objectValue = [self objectForColumnIndex:columnIdx stmt:pstmt];
+                    [dict setObject:objectValue forKey:columnName];
+                }
+                [resultArray addObject:dict];
+            }
+        }
+    }
+    [self close];
+    return resultArray;
+}
+
+
+- (id)objectForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt*)stmt {
+    int columnType = sqlite3_column_type(stmt, columnIdx);
+    
+    id returnValue = nil;
+    
+    if (columnType == SQLITE_INTEGER) {
+        returnValue =  [NSNumber numberWithLongLong:sqlite3_column_int64(stmt, columnIdx)];
+    }
+    else if (columnType == SQLITE_FLOAT) {
+        returnValue = [NSNumber numberWithDouble:sqlite3_column_double(stmt, columnIdx)];
+    }
+    else if (columnType == SQLITE_BLOB) {
+        returnValue = [self dataForColumnIndex:columnIdx stmt:stmt];
+    }
+    else {
+        //default to a string for everything else
+        returnValue = [self stringForColumnIndex:columnIdx stmt:stmt];
+    }
+    
+    if (returnValue == nil) {
+        returnValue = [NSNull null];
+    }
+    
+    return returnValue;
+}
+
+- (NSString *)stringForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt *)stmt {
+    
+    if (sqlite3_column_type(stmt, columnIdx) == SQLITE_NULL || (columnIdx < 0)) {
+        return nil;
+    }
+    
+    const char *c = (const char *)sqlite3_column_text(stmt, columnIdx);
+    
+    if (!c) {
+        // null row.
+        return nil;
+    }
+    
+    return [NSString stringWithUTF8String:c];
+}
+
+- (NSData *)dataForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt *)stmt{
+    
+    if (sqlite3_column_type(stmt, columnIdx) == SQLITE_NULL || (columnIdx < 0)) {
+        return nil;
+    }
+    
+    const char *dataBuffer = sqlite3_column_blob(stmt, columnIdx);
+    int dataSize = sqlite3_column_bytes(stmt, columnIdx);
+    
+    if (dataBuffer == NULL) {
+        return nil;
+    }
+    
+    return [NSData dataWithBytes:(const void *)dataBuffer length:(NSUInteger)dataSize];
+}
+
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableColumnHeader.h

@@ -0,0 +1,24 @@
+//
+//  FLEXTableContentHeaderCell.h
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/26.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+typedef NS_ENUM(NSUInteger, FLEXTableColumnHeaderSortType) {
+    FLEXTableColumnHeaderSortTypeNone = 0,
+    FLEXTableColumnHeaderSortTypeAsc,
+    FLEXTableColumnHeaderSortTypeDesc,
+};
+
+@interface FLEXTableColumnHeader : UIView
+
+@property (nonatomic) UILabel *label;
+
+- (void)changeSortStatusWithType:(FLEXTableColumnHeaderSortType)type;
+
+@end
+

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableColumnHeader.m

@@ -0,0 +1,60 @@
+//
+//  FLEXTableContentHeaderCell.m
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/26.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import "FLEXTableColumnHeader.h"
+
+@implementation FLEXTableColumnHeader
+{
+    UILabel *_arrowLabel;
+}
+
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        self.backgroundColor = UIColor.whiteColor;
+        
+        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(5, 0, frame.size.width - 25, frame.size.height)];
+        label.font = [UIFont systemFontOfSize:13.0];
+        [self addSubview:label];
+        self.label = label;
+        
+        
+        _arrowLabel = [[UILabel alloc] initWithFrame:CGRectMake(frame.size.width - 20, 0, 20, frame.size.height)];
+        _arrowLabel.font = [UIFont systemFontOfSize:13.0];
+        [self addSubview:_arrowLabel];
+        
+        UIView *line = [[UIView alloc] initWithFrame:CGRectMake(frame.size.width - 1, 2, 1, frame.size.height - 4)];
+        line.backgroundColor = [UIColor colorWithWhite:0.803 alpha:0.850];
+        [self addSubview:line];
+        
+    }
+    return self;
+}
+
+- (void)changeSortStatusWithType:(FLEXTableColumnHeaderSortType)type
+{
+    switch (type) {
+        case FLEXTableColumnHeaderSortTypeNone:
+            _arrowLabel.text = @"";
+            break;
+        case FLEXTableColumnHeaderSortTypeAsc:
+            _arrowLabel.text = @"⬆️";
+            break;
+        case FLEXTableColumnHeaderSortTypeDesc:
+            _arrowLabel.text = @"⬇️";
+            break;
+    }
+}
+
+
+
+
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentCell.h

@@ -0,0 +1,27 @@
+//
+//  FLEXTableContentCell.h
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class FLEXTableContentCell;
+@protocol FLEXTableContentCellDelegate <NSObject>
+
+@optional
+- (void)tableContentCell:(FLEXTableContentCell *)tableView labelDidTapWithText:(NSString *)text;
+
+@end
+
+@interface FLEXTableContentCell : UITableViewCell
+
+@property (nonatomic) NSArray<UILabel *> *labels;
+
+@property (nonatomic, weak) id<FLEXTableContentCellDelegate> delegate;
+
++ (instancetype)cellWithTableView:(UITableView *)tableView columnNumber:(NSInteger)number;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentCell.m

@@ -0,0 +1,66 @@
+//
+//  FLEXTableContentCell.m
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import "FLEXTableContentCell.h"
+#import "FLEXMultiColumnTableView.h"
+
+@interface FLEXTableContentCell ()
+
+@end
+
+@implementation FLEXTableContentCell
+
++ (instancetype)cellWithTableView:(UITableView *)tableView columnNumber:(NSInteger)number;
+{
+    static NSString *identifier = @"FLEXTableContentCell";
+    FLEXTableContentCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
+    if (!cell) {
+        cell = [[FLEXTableContentCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
+        NSMutableArray<UILabel *> *labels = [NSMutableArray array];
+        for (int i = 0; i < number ; i++) {
+            UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
+            label.backgroundColor = UIColor.whiteColor;
+            label.font            = [UIFont systemFontOfSize:13.0];
+            label.textAlignment   = NSTextAlignmentLeft;
+            label.backgroundColor = UIColor.greenColor;
+            [labels addObject:label];
+            
+            UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:cell
+                                                                                      action:@selector(labelDidTap:)];
+            [label addGestureRecognizer:gesture];
+            label.userInteractionEnabled = YES;
+            
+            [cell.contentView addSubview:label];
+            cell.contentView.backgroundColor = UIColor.whiteColor;
+        }
+        cell.labels = labels;
+    }
+    return cell;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    CGFloat labelWidth  = self.contentView.frame.size.width / self.labels.count;
+    CGFloat labelHeight = self.contentView.frame.size.height;
+    for (int i = 0; i < self.labels.count; i++) {
+        UILabel *label = self.labels[i];
+        label.frame = CGRectMake(labelWidth * i + 5, 0, (labelWidth - 10), labelHeight);
+    }
+}
+
+
+- (void)labelDidTap:(UIGestureRecognizer *)gesture
+{
+    UILabel *label = (UILabel *)gesture.view;
+    if ([self.delegate respondsToSelector:@selector(tableContentCell:labelDidTapWithText:)]) {
+        [self.delegate tableContentCell:self labelDidTapWithText:label.text];
+    }
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentViewController.h

@@ -0,0 +1,16 @@
+//
+//  PTTableContentViewController.h
+//  PTDatabaseReader
+//
+//  Created by Peng Tao on 15/11/23.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXTableContentViewController : UIViewController
+
+@property (nonatomic) NSArray<NSString *> *columnsArray;
+@property (nonatomic) NSArray<NSDictionary<NSString *, id> *> *contentsArray;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentViewController.m

@@ -0,0 +1,183 @@
+//
+//  PTTableContentViewController.m
+//  PTDatabaseReader
+//
+//  Created by Peng Tao on 15/11/23.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import "FLEXTableContentViewController.h"
+#import "FLEXMultiColumnTableView.h"
+#import "FLEXWebViewController.h"
+
+
+@interface FLEXTableContentViewController ()<FLEXMultiColumnTableViewDataSource, FLEXMultiColumnTableViewDelegate>
+
+@property (nonatomic) FLEXMultiColumnTableView *multiColumnView;
+
+@end
+
+@implementation FLEXTableContentViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.edgesForExtendedLayout = UIRectEdgeNone;
+    [self.view addSubview:self.multiColumnView];
+}
+
+- (void)viewWillAppear:(BOOL)animated
+{
+    [super viewWillAppear:animated];
+    [self.multiColumnView reloadData];
+}
+
+#pragma mark -
+
+#pragma mark init SubView
+- (FLEXMultiColumnTableView *)multiColumnView {
+    if (!_multiColumnView) {
+        _multiColumnView = [[FLEXMultiColumnTableView alloc] initWithFrame:
+                           CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
+        
+        _multiColumnView.autoresizingMask          = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin;
+        _multiColumnView.backgroundColor           = UIColor.whiteColor;
+        _multiColumnView.dataSource                = self;
+        _multiColumnView.delegate                  = self;
+    }
+    return _multiColumnView;
+}
+#pragma mark MultiColumnTableView DataSource
+
+- (NSInteger)numberOfColumnsInTableView:(FLEXMultiColumnTableView *)tableView
+{
+    return self.columnsArray.count;
+}
+- (NSInteger)numberOfRowsInTableView:(FLEXMultiColumnTableView *)tableView
+{
+    return self.contentsArray.count;
+}
+
+
+- (NSString *)columnNameInColumn:(NSInteger)column
+{
+    return self.columnsArray[column];
+}
+
+
+- (NSString *)rowNameInRow:(NSInteger)row
+{
+    return [NSString stringWithFormat:@"%ld",(long)row];
+}
+
+- (NSString *)contentAtColumn:(NSInteger)column row:(NSInteger)row
+{
+    if (self.contentsArray.count > row) {
+        NSDictionary<NSString *, id> *dic = self.contentsArray[row];
+        if (self.contentsArray.count > column) {
+            return [NSString stringWithFormat:@"%@",[dic objectForKey:self.columnsArray[column]]];
+        }
+    }
+    return @"";
+}
+
+- (NSArray *)contentAtRow:(NSInteger)row
+{
+    NSMutableArray *result = [NSMutableArray array];
+    if (self.contentsArray.count > row) {
+        NSDictionary<NSString *, id> *dic = self.contentsArray[row];
+        for (int i = 0; i < self.columnsArray.count; i ++) {
+            [result addObject:dic[self.columnsArray[i]]];
+        }
+        return result;
+    }
+    return nil;
+}
+
+- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView
+      heightForContentCellInRow:(NSInteger)row
+{
+    return 40;
+}
+
+- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView
+    widthForContentCellInColumn:(NSInteger)column
+{
+    return 120;
+}
+
+- (CGFloat)heightForTopHeaderInTableView:(FLEXMultiColumnTableView *)tableView
+{
+    return 40;
+}
+
+- (CGFloat)widthForLeftHeaderInTableView:(FLEXMultiColumnTableView *)tableView
+{
+    NSString *str = [NSString stringWithFormat:@"%lu",(unsigned long)self.contentsArray.count];
+    NSDictionary<NSString *, id> *attrs = @{@"NSFontAttributeName":[UIFont systemFontOfSize:17.0]};
+    CGSize size =   [str boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, 14)
+                                      options:NSStringDrawingUsesLineFragmentOrigin
+                                   attributes:attrs context:nil].size;
+    return size.width + 20;
+}
+
+#pragma mark -
+#pragma mark MultiColumnTableView Delegate
+
+
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapLabelWithText:(NSString *)text
+{
+    FLEXWebViewController * detailViewController = [[FLEXWebViewController alloc] initWithText:text];
+    [self.navigationController pushViewController:detailViewController animated:YES];
+}
+
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapHeaderWithText:(NSString *)text sortType:(FLEXTableColumnHeaderSortType)sortType
+{
+    
+    NSArray<NSDictionary<NSString *, id> *> *sortContentData = [self.contentsArray sortedArrayUsingComparator:^NSComparisonResult(NSDictionary<NSString *, id> * obj1, NSDictionary<NSString *, id> * obj2) {
+        
+        if ([obj1 objectForKey:text] == [NSNull null]) {
+            return NSOrderedAscending;
+        }
+        if ([obj2 objectForKey:text] == [NSNull null]) {
+            return NSOrderedDescending;
+        }
+        
+        if (![[obj1 objectForKey:text] respondsToSelector:@selector(compare:)] && ![[obj2 objectForKey:text] respondsToSelector:@selector(compare:)]) {
+            return NSOrderedSame;
+        }
+        
+        NSComparisonResult result =  [[obj1 objectForKey:text] compare:[obj2 objectForKey:text]];
+        
+        return result;
+    }];
+    if (sortType == FLEXTableColumnHeaderSortTypeDesc) {
+        NSEnumerator *contentReverseEnumerator = sortContentData.reverseObjectEnumerator;
+        sortContentData = [NSArray arrayWithArray:contentReverseEnumerator.allObjects];
+    }
+    
+    self.contentsArray = sortContentData;
+    [self.multiColumnView reloadData];
+}
+
+#pragma mark -
+#pragma mark About Transition
+
+- (void)willTransitionToTraitCollection:(UITraitCollection *)newCollection
+              withTransitionCoordinator:(id <UIViewControllerTransitionCoordinator>)coordinator
+{
+    [super willTransitionToTraitCollection:newCollection
+                 withTransitionCoordinator:coordinator];
+    [coordinator animateAlongsideTransition:^(id <UIViewControllerTransitionCoordinatorContext> context) {
+        if (newCollection.verticalSizeClass == UIUserInterfaceSizeClassCompact) {
+            
+            self->_multiColumnView.frame = CGRectMake(0, 32, self.view.frame.size.width, self.view.frame.size.height - 32);
+        }
+        else {
+            self->_multiColumnView.frame = CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height - 64);
+        }
+        [self.view setNeedsLayout];
+    } completion:nil];
+}
+
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableLeftCell.h

@@ -0,0 +1,17 @@
+//
+//  FLEXTableLeftCell.h
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXTableLeftCell : UITableViewCell
+
+@property (nonatomic) UILabel *titlelabel;
+
++ (instancetype)cellWithTableView:(UITableView *)tableView;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableLeftCell.m

@@ -0,0 +1,35 @@
+//
+//  FLEXTableLeftCell.m
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import "FLEXTableLeftCell.h"
+
+@implementation FLEXTableLeftCell
+
++ (instancetype)cellWithTableView:(UITableView *)tableView
+{
+    static NSString *identifier = @"FLEXTableLeftCell";
+    FLEXTableLeftCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
+    
+    if (!cell) {
+        cell = [[FLEXTableLeftCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
+        UILabel *textLabel               = [[UILabel alloc] initWithFrame:CGRectZero];
+        textLabel.textAlignment          = NSTextAlignmentCenter;
+        textLabel.font                   = [UIFont systemFontOfSize:13.0];
+        textLabel.backgroundColor = UIColor.clearColor;
+        [cell.contentView addSubview:textLabel];
+        cell.titlelabel = textLabel;
+    }
+    return cell;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    self.titlelabel.frame = self.contentView.frame;
+}
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableListViewController.h

@@ -0,0 +1,16 @@
+//
+//  PTTableListViewController.h
+//  PTDatabaseReader
+//
+//  Created by Peng Tao on 15/11/23.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+
+@interface FLEXTableListViewController : FLEXTableViewController
+
++ (BOOL)supportsExtension:(NSString *)extension;
+- (instancetype)initWithPath:(NSString *)path;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableListViewController.m

@@ -0,0 +1,163 @@
+//
+//  PTTableListViewController.m
+//  PTDatabaseReader
+//
+//  Created by Peng Tao on 15/11/23.
+//  Copyright © 2015年 Peng Tao. All rights reserved.
+//
+
+#import "FLEXTableListViewController.h"
+
+#import "FLEXDatabaseManager.h"
+#import "FLEXSQLiteDatabaseManager.h"
+#import "FLEXRealmDatabaseManager.h"
+
+#import "FLEXTableContentViewController.h"
+
+@interface FLEXTableListViewController ()
+{
+    id<FLEXDatabaseManager> _dbm;
+    NSString *_databasePath;
+}
+
+@property (nonatomic) NSArray<NSString *> *tables;
+@property (nonatomic) NSArray<NSString *> *filteredTables;
+
++ (NSArray<NSString *> *)supportedSQLiteExtensions;
++ (NSArray<NSString *> *)supportedRealmExtensions;
+
+@end
+
+@implementation FLEXTableListViewController
+
+- (instancetype)initWithPath:(NSString *)path
+{
+    self = [super initWithStyle:UITableViewStyleGrouped];
+    if (self) {
+        _databasePath = [path copy];
+        _dbm = [self databaseManagerForFileAtPath:_databasePath];
+        [_dbm open];
+        [self getAllTables];
+    }
+    return self;
+}
+
+- (id<FLEXDatabaseManager>)databaseManagerForFileAtPath:(NSString *)path
+{
+    NSString *pathExtension = path.pathExtension.lowercaseString;
+    
+    NSArray<NSString *> *sqliteExtensions = [FLEXTableListViewController supportedSQLiteExtensions];
+    if ([sqliteExtensions indexOfObject:pathExtension] != NSNotFound) {
+        return [[FLEXSQLiteDatabaseManager alloc] initWithPath:path];
+    }
+    
+    NSArray<NSString *> *realmExtensions = [FLEXTableListViewController supportedRealmExtensions];
+    if (realmExtensions != nil && [realmExtensions indexOfObject:pathExtension] != NSNotFound) {
+        return [[FLEXRealmDatabaseManager alloc] initWithPath:path];
+    }
+    
+    return nil;
+}
+
+- (void)getAllTables
+{
+    NSArray<NSDictionary<NSString *, id> *> *resultArray = [_dbm queryAllTables];
+    NSMutableArray<NSString *> *array = [NSMutableArray array];
+    for (NSDictionary<NSString *, id> *dict in resultArray) {
+        NSString *columnName = (NSString *)dict[@"name"] ?: @"";
+        [array addObject:columnName];
+    }
+    self.tables = array;
+    self.filteredTables = array;
+}
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    
+    self.showsSearchBar = YES;
+}
+
+#pragma mark - Search bar
+
+- (void)updateSearchResults:(NSString *)searchText
+{
+    if (searchText.length > 0) {
+        NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", searchText];
+        self.filteredTables = [self.tables filteredArrayUsingPredicate:searchPredicate];
+    } else {
+        self.filteredTables = self.tables;
+    }
+    [self.tableView reloadData];
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.filteredTables.count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FLEXTableListViewControllerCell"];
+    if (!cell) {
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
+                                      reuseIdentifier:@"FLEXTableListViewControllerCell"];
+    }
+    cell.textLabel.text = self.filteredTables[indexPath.row];
+    return cell;
+}
+
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXTableContentViewController *contentViewController = [FLEXTableContentViewController new];
+    
+    contentViewController.contentsArray = [_dbm queryAllDataWithTableName:self.filteredTables[indexPath.row]];
+    contentViewController.columnsArray = [_dbm queryAllColumnsWithTableName:self.filteredTables[indexPath.row]];
+    
+    contentViewController.title = self.filteredTables[indexPath.row];
+    [self.navigationController pushViewController:contentViewController animated:YES];
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return [NSString stringWithFormat:@"Tables (%lu)", (unsigned long)self.filteredTables.count];
+}
+
+#pragma mark - FLEXTableListViewController
+
++ (BOOL)supportsExtension:(NSString *)extension
+{
+    extension = extension.lowercaseString;
+    
+    NSArray<NSString *> *sqliteExtensions = [FLEXTableListViewController supportedSQLiteExtensions];
+    if (sqliteExtensions.count > 0 && [sqliteExtensions indexOfObject:extension] != NSNotFound) {
+        return YES;
+    }
+    
+    NSArray<NSString *> *realmExtensions = [FLEXTableListViewController supportedRealmExtensions];
+    if (realmExtensions.count > 0 && [realmExtensions indexOfObject:extension] != NSNotFound) {
+        return YES;
+    }
+    
+    return NO;
+}
+
++ (NSArray<NSString *> *)supportedSQLiteExtensions
+{
+    return @[@"db", @"sqlite", @"sqlite3"];
+}
+
++ (NSArray<NSString *> *)supportedRealmExtensions
+{
+    if (NSClassFromString(@"RLMRealm") == nil) {
+        return nil;
+    }
+    
+    return @[@"realm"];
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/LICENSE

@@ -0,0 +1,21 @@
+
+FMDB
+Copyright (c) 2008-2014 Flying Meat Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Classes/GlobalStateExplorers/FLEXAddressExplorerCoordinator.h

@@ -0,0 +1,13 @@
+//
+//  FLEXAddressExplorerCoordinator.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/10/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXGlobalsEntry.h"
+
+@interface FLEXAddressExplorerCoordinator : NSObject <FLEXGlobalsEntry>
+
+@end

Classes/GlobalStateExplorers/FLEXAddressExplorerCoordinator.m

@@ -0,0 +1,95 @@
+//
+//  FLEXAddressExplorerCoordinator.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/10/19.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXAddressExplorerCoordinator.h"
+#import "FLEXGlobalsTableViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXObjectExplorerViewController.h"
+#import "FLEXRuntimeUtility.h"
+#import "FLEXUtility.h"
+
+@interface FLEXGlobalsTableViewController (FLEXAddressExploration)
+- (void)deselectSelectedRow;
+- (void)tryExploreAddress:(NSString *)addressString safely:(BOOL)safely;
+@end
+
+@implementation FLEXAddressExplorerCoordinator
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    return @"🔎 Address Explorer";
+}
+
++ (FLEXGlobalsTableViewControllerRowAction)globalsEntryRowAction:(FLEXGlobalsRow)row {
+    return ^(FLEXGlobalsTableViewController *host) {
+
+        NSString *title = @"Explore Object at Address";
+        NSString *message = @"Paste a hexadecimal address below, starting with '0x'. "
+        "Use the unsafe option if you need to bypass pointer validation, "
+        "but know that it may crash the app if the address is invalid.";
+
+        [FLEXAlert makeAlert:^(FLEXAlert *make) {
+            make.title(title).message(message);
+            make.configuredTextField(^(UITextField *textField) {
+                NSString *copied = UIPasteboard.generalPasteboard.string;
+                textField.placeholder = @"0x00000070deadbeef";
+                // Go ahead and paste our clipboard if we have an address copied
+                if ([copied hasPrefix:@"0x"]) {
+                    textField.text = copied;
+                    [textField selectAll:nil];
+                }
+            });
+            make.button(@"Explore").handler(^(NSArray<NSString *> *strings) {
+                [host tryExploreAddress:strings.firstObject safely:YES];
+            });
+            make.button(@"Unsafe Explore").destructiveStyle().handler(^(NSArray *strings) {
+                [host tryExploreAddress:strings.firstObject safely:NO];
+            });
+            make.button(@"Cancel").cancelStyle();
+        } showFrom:host];
+
+    };
+}
+
+@end
+
+@implementation FLEXGlobalsTableViewController (FLEXAddressExploration)
+
+- (void)deselectSelectedRow {
+    NSIndexPath *selected = self.tableView.indexPathForSelectedRow;
+    [self.tableView deselectRowAtIndexPath:selected animated:YES];
+}
+
+- (void)tryExploreAddress:(NSString *)addressString safely:(BOOL)safely {
+    NSScanner *scanner = [NSScanner scannerWithString:addressString];
+    unsigned long long hexValue = 0;
+    BOOL didParseAddress = [scanner scanHexLongLong:&hexValue];
+    const void *pointerValue = (void *)hexValue;
+
+    NSString *error = nil;
+
+    if (didParseAddress) {
+        if (safely && ![FLEXRuntimeUtility pointerIsValidObjcObject:pointerValue]) {
+            error = @"The given address is unlikely to be a valid object.";
+        }
+    } else {
+        error = @"Malformed address. Make sure it's not too long and starts with '0x'.";
+    }
+
+    if (!error) {
+        id object = (__bridge id)pointerValue;
+        FLEXObjectExplorerViewController *explorer = [FLEXObjectExplorerFactory explorerViewControllerForObject:object];
+        [self.navigationController pushViewController:explorer animated:YES];
+    } else {
+        [FLEXAlert showAlert:@"Uh-oh" message:error from:self];
+        [self deselectSelectedRow];
+    }
+}
+
+@end

Classes/GlobalStateExplorers/FLEXClassesTableViewController.h

@@ -6,10 +6,11 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
+#import "FLEXTableViewController.h"
+#import "FLEXGlobalsEntry.h"
 
-@interface FLEXClassesTableViewController : UITableViewController
+@interface FLEXClassesTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
 
-@property (nonatomic, copy) NSString *binaryImageName;
++ (instancetype)binaryImageName:(NSString *)binaryImageName;
 
 @end

Classes/GlobalStateExplorers/FLEXClassesTableViewController.m

@@ -12,48 +12,66 @@
 #import "FLEXUtility.h"
 #import <objc/runtime.h>
 
-@interface FLEXClassesTableViewController () <UISearchBarDelegate>
+@interface FLEXClassesTableViewController ()
 
-@property (nonatomic, strong) NSArray *classNames;
-@property (nonatomic, strong) NSArray *filteredClassNames;
-@property (nonatomic, strong) UISearchBar *searchBar;
+@property (nonatomic, copy) NSArray<NSString *> *classNames;
+@property (nonatomic, copy) NSArray<NSString *> *filteredClassNames;
+@property (nonatomic, copy) NSString *binaryImageName;
 
 @end
 
 @implementation FLEXClassesTableViewController
 
+#pragma mark - Initialization
+
++ (instancetype)binaryImageName:(NSString *)binaryImageName
+{
+    return [[self alloc] initWithBinaryImageName:binaryImageName];
+}
+
+- (id)initWithBinaryImageName:(NSString *)binaryImageName
+{
+    NSParameterAssert(binaryImageName);
+
+    self = [super init];
+    if (self) {
+        self.binaryImageName = binaryImageName;
+        [self loadClassNames];
+    }
+
+    return self;
+}
+
+
+#pragma mark - Internal
+
 - (void)viewDidLoad
 {
     [super viewDidLoad];
     
-    self.searchBar = [[UISearchBar alloc] init];
-    self.searchBar.placeholder = [FLEXUtility searchBarPlaceholderText];
-    self.searchBar.delegate = self;
-    [self.searchBar sizeToFit];
-    self.tableView.tableHeaderView = self.searchBar;
+    self.showsSearchBar = YES;
+    [self updateTitle];
 }
 
-- (void)setBinaryImageName:(NSString *)binaryImageName
+- (void)updateTitle
 {
-    if (![_binaryImageName isEqual:binaryImageName]) {
-        _binaryImageName = binaryImageName;
-        [self loadClassNames];
-        [self updateTitle];
-    }
+    NSString *shortImageName = self.binaryImageName.lastPathComponent;
+    self.title = [NSString stringWithFormat:@"%@ Classes (%lu)",
+        shortImageName, (unsigned long)self.filteredClassNames.count
+    ];
 }
 
-- (void)setClassNames:(NSArray *)classNames
+- (void)setClassNames:(NSArray<NSString *> *)classNames
 {
-    _classNames = classNames;
-    self.filteredClassNames = classNames;
+    _classNames = self.filteredClassNames = classNames.copy;
 }
 
 - (void)loadClassNames
 {
     unsigned int classNamesCount = 0;
-    const char **classNames = objc_copyClassNamesForImage([self.binaryImageName UTF8String], &classNamesCount);
+    const char **classNames = objc_copyClassNamesForImage(self.binaryImageName.UTF8String, &classNamesCount);
     if (classNames) {
-        NSMutableArray *classNameStrings = [NSMutableArray array];
+        NSMutableArray<NSString *> *classNameStrings = [NSMutableArray array];
         for (unsigned int i = 0; i < classNamesCount; i++) {
             const char *className = classNames[i];
             NSString *classNameString = [NSString stringWithUTF8String:className];
@@ -66,20 +84,25 @@
     }
 }
 
-- (void)updateTitle
-{
-    NSString *shortImageName = [[self.binaryImageName componentsSeparatedByString:@"/"] lastObject];
-    self.title = [NSString stringWithFormat:@"%@ Classes (%lu)", shortImageName, (unsigned long)[self.filteredClassNames count]];
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    return [NSString stringWithFormat:@"📕  %@ Classes", [FLEXUtility applicationName]];
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    return [self binaryImageName:[FLEXUtility applicationImageName]];
 }
 
 
-#pragma mark - Search
+#pragma mark - Search bar
 
-- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
+- (void)updateSearchResults:(NSString *)searchText
 {
-    if ([searchText length] > 0) {
-        NSPredicate *searchPreidcate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", searchText];
-        self.filteredClassNames = [self.classNames filteredArrayUsingPredicate:searchPreidcate];
+    if (searchText.length > 0) {
+        NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", searchText];
+        self.filteredClassNames = [self.classNames filteredArrayUsingPredicate:searchPredicate].reverseObjectEnumerator.allObjects;
     } else {
         self.filteredClassNames = self.classNames;
     }
@@ -87,17 +110,6 @@
     [self.tableView reloadData];
 }
 
-- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
-{
-    [searchBar resignFirstResponder];
-}
-
-- (void)scrollViewDidScroll:(UIScrollView *)scrollView
-{
-    // Dismiss the keyboard when interacting with filtered results.
-    [self.searchBar endEditing:YES];
-}
-
 
 #pragma mark - Table View Data Source
 
@@ -108,7 +120,7 @@
 
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 {
-    return [self.filteredClassNames count];
+    return self.filteredClassNames.count;
 }
 
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
@@ -131,8 +143,8 @@
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    NSString *className = [self.filteredClassNames objectAtIndex:indexPath.row];
-    Class selectedClass = objc_getClass([className UTF8String]);
+    NSString *className = self.filteredClassNames[indexPath.row];
+    Class selectedClass = objc_getClass(className.UTF8String);
     FLEXObjectExplorerViewController *objectExplorer = [FLEXObjectExplorerFactory explorerViewControllerForObject:selectedClass];
     [self.navigationController pushViewController:objectExplorer animated:YES];
 }

Classes/GlobalStateExplorers/FLEXCookiesTableViewController.h

@@ -6,8 +6,9 @@
 //  Copyright © 2015 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
+#import "FLEXGlobalsEntry.h"
+#import "FLEXTableViewController.h"
 
-@interface FLEXCookiesTableViewController : UITableViewController
+@interface FLEXCookiesTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
 
 @end

Classes/GlobalStateExplorers/FLEXCookiesTableViewController.m

@@ -11,33 +11,37 @@
 #import "FLEXUtility.h"
 
 @interface FLEXCookiesTableViewController ()
-
-@property (nonatomic, strong) NSArray *cookies;
-
+@property (nonatomic, readonly) NSArray<NSHTTPCookie *> *cookies;
+@property (nonatomic) NSString *headerTitle;
 @end
 
 @implementation FLEXCookiesTableViewController
 
-- (id)initWithStyle:(UITableViewStyle)style {
-    self = [super initWithStyle:style];
-    
-    if (self) {
-        self.title = @"Cookies";
+- (void)viewDidLoad {
+    [super viewDidLoad];
 
-        NSSortDescriptor *nameSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)];
-        _cookies =[[NSHTTPCookieStorage sharedHTTPCookieStorage].cookies sortedArrayUsingDescriptors:@[nameSortDescriptor]];
-    }
-    
-    return self;
+    NSSortDescriptor *nameSortDescriptor = [[NSSortDescriptor alloc]
+        initWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)
+    ];
+    _cookies = [NSHTTPCookieStorage.sharedHTTPCookieStorage.cookies
+        sortedArrayUsingDescriptors:@[nameSortDescriptor]
+    ];
+
+    self.title = @"Cookies";
+    [self updateHeaderTitle];
+}
+
+- (void)updateHeaderTitle {
+    self.headerTitle = [NSString stringWithFormat:@"%@ cookies", @(self.cookies.count)];
+    // TODO update header title here when we can search cookies
 }
 
 - (NSHTTPCookie *)cookieForRowAtIndexPath:(NSIndexPath *)indexPath {
     return self.cookies[indexPath.row];
 }
 
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
-    return 1;
-}
+
+#pragma mark - Table View Data Source
 
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
     return self.cookies.count;
@@ -50,7 +54,7 @@
         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
         cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
         cell.detailTextLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
-        cell.detailTextLabel.textColor = [UIColor grayColor];
+        cell.detailTextLabel.textColor = UIColor.grayColor;
         cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
     }
     
@@ -61,6 +65,13 @@
     return cell;
 }
 
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    return self.headerTitle;
+}
+
+
+#pragma mark - Table View Delegate
+
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
     NSHTTPCookie *cookie = [self cookieForRowAtIndexPath:indexPath];
     UIViewController *cookieViewController = (UIViewController *)[FLEXObjectExplorerFactory explorerViewControllerForObject:cookie];
@@ -68,4 +79,15 @@
     [self.navigationController pushViewController:cookieViewController animated:YES];
 }
 
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    return @"🍪  Cookies";
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    return [self new];
+}
+
 @end

Classes/GlobalStateExplorers/FLEXFileBrowserFileOperationController.h

@@ -1,33 +0,0 @@
-//
-//  FLEXFileBrowserFileOperationController.h
-//  Flipboard
-//
-//  Created by Daniel Rodriguez Troitino on 2/13/15.
-//  Copyright (c) 2015 Flipboard. All rights reserved.
-//
-
-#import <Foundation/Foundation.h>
-
-@protocol FLEXFileBrowserFileOperationController;
-
-@protocol FLEXFileBrowserFileOperationControllerDelegate <NSObject>
-
-- (void)fileOperationControllerDidDismiss:(id<FLEXFileBrowserFileOperationController>)controller;
-
-@end
-
-@protocol FLEXFileBrowserFileOperationController <NSObject>
-
-@property (nonatomic, weak) id<FLEXFileBrowserFileOperationControllerDelegate> delegate;
-
-- (instancetype)initWithPath:(NSString *)path;
-
-- (void)show;
-
-@end
-
-@interface FLEXFileBrowserFileDeleteOperationController : NSObject <FLEXFileBrowserFileOperationController>
-@end
-
-@interface FLEXFileBrowserFileRenameOperationController : NSObject <FLEXFileBrowserFileOperationController>
-@end

Classes/GlobalStateExplorers/FLEXFileBrowserFileOperationController.m

@@ -1,142 +0,0 @@
-//
-//  FLEXFileBrowserFileOperationController.m
-//  Flipboard
-//
-//  Created by Daniel Rodriguez Troitino on 2/13/15.
-//  Copyright (c) 2015 Flipboard. All rights reserved.
-//
-
-#import "FLEXFileBrowserFileOperationController.h"
-#import <UIKit/UIKit.h>
-
-@interface FLEXFileBrowserFileDeleteOperationController () <UIAlertViewDelegate>
-
-@property (nonatomic, copy, readonly) NSString *path;
-
-- (instancetype)initWithPath:(NSString *)path NS_DESIGNATED_INITIALIZER;
-
-@end
-
-@implementation FLEXFileBrowserFileDeleteOperationController
-
-@synthesize delegate = _delegate;
-
-- (instancetype)init
-{
-    return [self initWithPath:nil];
-}
-
-- (instancetype)initWithPath:(NSString *)path
-{
-    self = [super init];
-    if (self) {
-        _path = path;
-    }
-
-    return self;
-}
-
-- (void)show
-{
-    BOOL isDirectory = NO;
-    BOOL stillExists = [[NSFileManager defaultManager] fileExistsAtPath:self.path isDirectory:&isDirectory];
-
-    if (stillExists) {
-        UIAlertView *deleteWarning = [[UIAlertView alloc]
-                                      initWithTitle:[NSString stringWithFormat:@"Delete %@?", self.path.lastPathComponent]
-                                      message:[NSString stringWithFormat:@"The %@ will be deleted. This operation cannot be undone", isDirectory ? @"directory" : @"file"]
-                                      delegate:self
-                                      cancelButtonTitle:@"Cancel"
-                                      otherButtonTitles:@"Delete", nil];
-        [deleteWarning show];
-    } else {
-        [[[UIAlertView alloc] initWithTitle:@"File Removed" message:@"The file at the specified path no longer exists." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
-    }
-}
-
-#pragma mark - UIAlertViewDelegate
-
-- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
-{
-    if (buttonIndex == alertView.cancelButtonIndex) {
-        // Nothing, just cancel
-    } else if (buttonIndex == alertView.firstOtherButtonIndex) {
-        [[NSFileManager defaultManager] removeItemAtPath:self.path error:NULL];
-    }
-}
-
-- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
-{
-    [self.delegate fileOperationControllerDidDismiss:self];
-}
-
-@end
-
-@interface FLEXFileBrowserFileRenameOperationController () <UIAlertViewDelegate>
-
-@property (nonatomic, copy, readonly) NSString *path;
-
-- (instancetype)initWithPath:(NSString *)path NS_DESIGNATED_INITIALIZER;
-
-@end
-
-@implementation FLEXFileBrowserFileRenameOperationController
-
-@synthesize delegate = _delegate;
-
-- (instancetype)init
-{
-    return [self initWithPath:nil];
-}
-
-- (instancetype)initWithPath:(NSString *)path
-{
-    self = [super init];
-    if (self) {
-        _path = path;
-    }
-
-    return self;
-}
-
-- (void)show
-{
-    BOOL isDirectory = NO;
-    BOOL stillExists = [[NSFileManager defaultManager] fileExistsAtPath:self.path isDirectory:&isDirectory];
-
-    if (stillExists) {
-        UIAlertView *renameDialog = [[UIAlertView alloc]
-                                     initWithTitle:[NSString stringWithFormat:@"Rename %@?", self.path.lastPathComponent]
-                                     message:nil
-                                     delegate:self
-                                     cancelButtonTitle:@"Cancel"
-                                     otherButtonTitles:@"Rename", nil];
-        renameDialog.alertViewStyle = UIAlertViewStylePlainTextInput;
-        UITextField *textField = [renameDialog textFieldAtIndex:0];
-        textField.placeholder = @"New file name";
-        textField.text = self.path.lastPathComponent;
-        [renameDialog show];
-    } else {
-        [[[UIAlertView alloc] initWithTitle:@"File Removed" message:@"The file at the specified path no longer exists." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
-    }
-}
-
-#pragma mark - UIAlertViewDelegate
-
-- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
-{
-    if (buttonIndex == alertView.cancelButtonIndex) {
-        // Nothing, just cancel
-    } else if (buttonIndex == alertView.firstOtherButtonIndex) {
-        NSString *newFileName = [alertView textFieldAtIndex:0].text;
-        NSString *newPath = [[self.path stringByDeletingLastPathComponent] stringByAppendingPathComponent:newFileName];
-        [[NSFileManager defaultManager] moveItemAtPath:self.path toPath:newPath error:NULL];
-    }
-}
-
-- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
-{
-    [self.delegate fileOperationControllerDidDismiss:self];
-}
-
-@end

Classes/GlobalStateExplorers/FLEXFileBrowserTableViewController.m

@@ -1,391 +0,0 @@
-//
-//  FLEXFileBrowserTableViewController.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 6/9/14.
-//
-//
-
-#import "FLEXFileBrowserTableViewController.h"
-#import "FLEXFileBrowserFileOperationController.h"
-#import "FLEXUtility.h"
-#import "FLEXWebViewController.h"
-#import "FLEXImagePreviewViewController.h"
-
-@interface FLEXFileBrowserTableViewCell : UITableViewCell
-@end
-
-@interface FLEXFileBrowserTableViewController () <FLEXFileBrowserFileOperationControllerDelegate>
-
-@property (nonatomic, copy) NSString *path;
-@property (nonatomic, copy) NSArray *childPaths;
-@property (nonatomic, copy) NSString *searchString;
-@property (nonatomic, strong) NSArray *searchPaths;
-@property (nonatomic, strong) NSNumber *recursiveSize;
-@property (nonatomic, strong) NSNumber *searchPathsSize;
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-@property (nonatomic, strong) UISearchDisplayController *searchController;
-#pragma clang diagnostic pop
-@property (nonatomic) NSOperationQueue *operationQueue;
-@property (nonatomic, strong) UIDocumentInteractionController *documentController;
-@property (nonatomic, strong) id<FLEXFileBrowserFileOperationController> fileOperationController;
-
-@end
-
-@implementation FLEXFileBrowserTableViewController
-
-- (id)initWithStyle:(UITableViewStyle)style
-{
-    return [self initWithPath:NSHomeDirectory()];
-}
-
-- (id)initWithPath:(NSString *)path
-{
-    self = [super initWithStyle:UITableViewStyleGrouped];
-    if (self) {
-        self.path = path;
-        self.title = [path lastPathComponent];
-        self.operationQueue = [NSOperationQueue new];
-        
-        //add search controller
-        UISearchBar *searchBar = [UISearchBar new];
-        [searchBar sizeToFit];
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-        self.searchController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
-#pragma clang diagnostic pop
-        self.searchController.delegate = self;
-        self.searchController.searchResultsDataSource = self;
-        self.searchController.searchResultsDelegate = self;
-        self.tableView.tableHeaderView = self.searchController.searchBar;
-        
-        //computing path size
-        FLEXFileBrowserTableViewController *__weak weakSelf = self;
-        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-            NSFileManager *fileManager = [NSFileManager defaultManager];
-            NSDictionary *attributes = [fileManager attributesOfItemAtPath:path error:NULL];
-            uint64_t totalSize = [attributes fileSize];
-            
-            for (NSString *fileName in [fileManager enumeratorAtPath:path]) {
-                attributes = [fileManager attributesOfItemAtPath:[path stringByAppendingPathComponent:fileName] error:NULL];
-                totalSize += [attributes fileSize];
-                
-                // Bail if the interested view controller has gone away.
-                if (!weakSelf) {
-                    return;
-                }
-            }
-            
-            dispatch_async(dispatch_get_main_queue(), ^{
-                FLEXFileBrowserTableViewController *__strong strongSelf = weakSelf;
-                strongSelf.recursiveSize = @(totalSize);
-                [strongSelf.tableView reloadData];
-            });
-        });
-
-        [self reloadChildPaths];
-    }
-    return self;
-}
-
-#pragma mark - UIViewController
-
-- (void)viewDidLoad
-{
-    [super viewDidLoad];
-
-    UIMenuItem *renameMenuItem = [[UIMenuItem alloc] initWithTitle:@"Rename" action:@selector(fileBrowserRename:)];
-    UIMenuItem *deleteMenuItem = [[UIMenuItem alloc] initWithTitle:@"Delete" action:@selector(fileBrowserDelete:)];
-    [UIMenuController sharedMenuController].menuItems = @[renameMenuItem, deleteMenuItem];
-}
-
-#pragma mark - FLEXFileBrowserSearchOperationDelegate
-
-- (void)fileBrowserSearchOperationResult:(NSArray *)searchResult size:(uint64_t)size
-{
-    self.searchPaths = searchResult;
-    self.searchPathsSize = @(size);
-    [self.searchController.searchResultsTableView reloadData];
-}
-
-#pragma mark - UISearchDisplayDelegate
-
-- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
-{
-    self.searchString = searchString;
-    [self reloadSearchPaths];
-
-    return YES;
-}
-
-- (void)searchDisplayController:(UISearchDisplayController *)controller willHideSearchResultsTableView:(UITableView *)tableView
-{
-    //confirm to clear all operations
-    [self.operationQueue cancelAllOperations];
-    [self reloadChildPaths];
-    [self.tableView reloadData];
-}
-
-
-#pragma mark - Table view data source
-
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
-{
-    return 1;
-}
-
-- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
-{
-    if (tableView == self.tableView) {
-        return [self.childPaths count];
-    } else {
-        return [self.searchPaths count];
-    }
-}
-
-- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
-{
-    NSNumber *currentSize = nil;
-    NSArray *currentPaths = nil;
-    
-    if (tableView == self.tableView) {
-        currentSize = self.recursiveSize;
-        currentPaths = self.childPaths;
-    } else {
-        currentSize = self.searchPathsSize;
-        currentPaths = self.searchPaths;
-    }
-    
-    NSString *sizeString = nil;
-    if (!currentSize) {
-        sizeString = @"Computing size…";
-    } else {
-        sizeString = [NSByteCountFormatter stringFromByteCount:[currentSize longLongValue] countStyle:NSByteCountFormatterCountStyleFile];
-    }
-    
-    return [NSString stringWithFormat:@"%lu files (%@)", (unsigned long)[currentPaths count], sizeString];
-}
-
-- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    NSString *fullPath = nil;
-    if (tableView == self.tableView) {
-        NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
-        fullPath = [self.path stringByAppendingPathComponent:subpath];
-    } else {
-        fullPath = [self.searchPaths objectAtIndex:indexPath.row];
-    }
-    
-    NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:fullPath error:NULL];
-    BOOL isDirectory = [[attributes fileType] isEqual:NSFileTypeDirectory];
-    NSString *subtitle = nil;
-    if (isDirectory) {
-        NSUInteger count = [[[NSFileManager defaultManager] contentsOfDirectoryAtPath:fullPath error:NULL] count];
-        subtitle = [NSString stringWithFormat:@"%lu file%@", (unsigned long)count, (count == 1 ? @"" : @"s")];
-    } else {
-        NSString *sizeString = [NSByteCountFormatter stringFromByteCount:[attributes fileSize] countStyle:NSByteCountFormatterCountStyleFile];
-        subtitle = [NSString stringWithFormat:@"%@ - %@", sizeString, [attributes fileModificationDate]];
-    }
-    
-    static NSString *textCellIdentifier = @"textCell";
-    static NSString *imageCellIdentifier = @"imageCell";
-    UITableViewCell *cell = nil;
-    
-    // Separate image and text only cells because otherwise the separator lines get out-of-whack on image cells reused with text only.
-    BOOL showImagePreview = [FLEXUtility isImagePathExtension:[fullPath pathExtension]];
-    NSString *cellIdentifier = showImagePreview ? imageCellIdentifier : textCellIdentifier;
-    
-    if (!cell) {
-        cell = [[FLEXFileBrowserTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
-        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
-        cell.detailTextLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
-        cell.detailTextLabel.textColor = [UIColor grayColor];
-        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
-    }
-    NSString *cellTitle = [fullPath lastPathComponent];
-    cell.textLabel.text = cellTitle;
-    cell.detailTextLabel.text = subtitle;
-    
-    if (showImagePreview) {
-        cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
-        cell.imageView.image = [UIImage imageWithContentsOfFile:fullPath];
-    }
-    
-    return cell;
-}
-
-- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    NSString *subpath = nil;
-    NSString *fullPath = nil;
-    
-    if (tableView == self.tableView) {
-        subpath = [self.childPaths objectAtIndex:indexPath.row];
-        fullPath = [self.path stringByAppendingPathComponent:subpath];
-    } else {
-        fullPath = [self.searchPaths objectAtIndex:indexPath.row];
-        subpath = [fullPath lastPathComponent];
-    }
-    
-    BOOL isDirectory = NO;
-    BOOL stillExists = [[NSFileManager defaultManager] fileExistsAtPath:fullPath isDirectory:&isDirectory];
-    if (stillExists) {
-        UIViewController *drillInViewController = nil;
-        if (isDirectory) {
-            drillInViewController = [[[self class] alloc] initWithPath:fullPath];
-        } else if ([FLEXUtility isImagePathExtension:[fullPath pathExtension]]) {
-            UIImage *image = [UIImage imageWithContentsOfFile:fullPath];
-            drillInViewController = [[FLEXImagePreviewViewController alloc] initWithImage:image];
-        } else {
-            // Special case keyed archives, json, and plists to get more readable data.
-            NSString *prettyString = nil;
-            if ([[subpath pathExtension] isEqual:@"archive"]) {
-                prettyString = [[NSKeyedUnarchiver unarchiveObjectWithFile:fullPath] description];
-            } else if ([[subpath pathExtension] isEqualToString:@"json"]) {
-                prettyString = [FLEXUtility prettyJSONStringFromData:[NSData dataWithContentsOfFile:fullPath]];
-            } else if ([[subpath pathExtension] isEqualToString:@"plist"]) {
-                NSData *fileData = [NSData dataWithContentsOfFile:fullPath];
-                prettyString = [[NSPropertyListSerialization propertyListWithData:fileData options:0 format:NULL error:NULL] description];
-            }
-            
-            if ([prettyString length] > 0) {
-                drillInViewController = [[FLEXWebViewController alloc] initWithText:prettyString];
-            } else if ([FLEXWebViewController supportsPathExtension:[subpath pathExtension]]) {
-                drillInViewController = [[FLEXWebViewController alloc] initWithURL:[NSURL fileURLWithPath:fullPath]];
-            } else {
-                NSString *fileString = [NSString stringWithContentsOfFile:fullPath encoding:NSUTF8StringEncoding error:NULL];
-                if ([fileString length] > 0) {
-                    drillInViewController = [[FLEXWebViewController alloc] initWithText:fileString];
-                }
-            }
-        }
-        
-        if (drillInViewController) {
-            drillInViewController.title = [subpath lastPathComponent];
-            [self.navigationController pushViewController:drillInViewController animated:YES];
-        } else {
-            [self openFileController:fullPath];
-            [self.tableView deselectRowAtIndexPath:indexPath animated:YES];
-        }
-    } else {
-        [[[UIAlertView alloc] initWithTitle:@"File Removed" message:@"The file at the specified path no longer exists." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
-        [self reloadDisplayedPaths];
-    }
-}
-
-- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    return YES;
-}
-
-- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
-{
-    return action == @selector(fileBrowserDelete:) || action == @selector(fileBrowserRename:);
-}
-
-- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
-{
-    // Empty, but has to exist for the menu to show
-    // The table view only calls this method for actions in the UIResponderStandardEditActions informal protocol.
-    // Since our actions are outside of that protocol, we need to manually handle the action forwarding from the cells.
-}
-
-#pragma mark - FLEXFileBrowserFileOperationControllerDelegate
-
-- (void)fileOperationControllerDidDismiss:(id<FLEXFileBrowserFileOperationController>)controller
-{
-    [self reloadDisplayedPaths];
-}
-
-- (void)openFileController:(NSString *)fullPath
-{
-    UIDocumentInteractionController *controller = [UIDocumentInteractionController new];
-    controller.URL = [[NSURL alloc] initFileURLWithPath:fullPath];
-
-    [controller presentOptionsMenuFromRect:self.view.bounds inView:self.view animated:YES];
-    self.documentController = controller;
-}
-
-- (void)fileBrowserRename:(UITableViewCell *)sender
-{
-    NSString *fullPath = nil;
-
-    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
-    if (indexPath) {
-        NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
-        fullPath = [self.path stringByAppendingPathComponent:subpath];
-    } else {
-        indexPath = [self.searchController.searchResultsTableView indexPathForCell:sender];
-        fullPath = [self.searchPaths objectAtIndex:indexPath.row];
-    }
-
-    self.fileOperationController = [[FLEXFileBrowserFileRenameOperationController alloc] initWithPath:fullPath];
-    self.fileOperationController.delegate = self;
-    [self.fileOperationController show];
-}
-
-- (void)fileBrowserDelete:(UITableViewCell *)sender
-{
-    NSString *fullPath = nil;
-
-    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
-    if (indexPath) {
-        NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
-        fullPath = [self.path stringByAppendingPathComponent:subpath];
-    } else {
-        indexPath = [self.searchController.searchResultsTableView indexPathForCell:sender];
-        fullPath = [self.searchPaths objectAtIndex:indexPath.row];
-    }
-
-    self.fileOperationController = [[FLEXFileBrowserFileDeleteOperationController alloc] initWithPath:fullPath];
-    self.fileOperationController.delegate = self;
-    [self.fileOperationController show];
-}
-
-- (void)reloadDisplayedPaths
-{
-    if (self.searchController.isActive) {
-        [self reloadSearchPaths];
-        [self.searchController.searchResultsTableView reloadData];
-    } else {
-        [self reloadChildPaths];
-        [self.tableView reloadData];
-    }
-}
-
-- (void)reloadChildPaths
-{
-    self.childPaths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:self.path error:NULL];
-}
-
-- (void)reloadSearchPaths
-{
-    self.searchPaths = nil;
-    self.searchPathsSize = nil;
-
-    //clear pre search request and start a new one
-    [self.operationQueue cancelAllOperations];
-    FLEXFileBrowserSearchOperation *newOperation = [[FLEXFileBrowserSearchOperation alloc] initWithPath:self.path searchString:self.searchString];
-    newOperation.delegate = self;
-    [self.operationQueue addOperation:newOperation];
-}
-
-@end
-
-
-@implementation FLEXFileBrowserTableViewCell
-
-- (void)fileBrowserRename:(UIMenuController *)sender
-{
-    id target = [self.nextResponder targetForAction:_cmd withSender:sender];
-    [[UIApplication sharedApplication] sendAction:_cmd to:target from:self forEvent:nil];
-}
-
-- (void)fileBrowserDelete:(UIMenuController *)sender
-{
-    id target = [self.nextResponder targetForAction:_cmd withSender:sender];
-    [[UIApplication sharedApplication] sendAction:_cmd to:target from:self forEvent:nil];
-}
-
-@end

Classes/GlobalStateExplorers/FLEXGlobalsTableViewController.m

@@ -1,306 +0,0 @@
-//
-//  FLEXGlobalsTableViewController.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 2014-05-03.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import "FLEXGlobalsTableViewController.h"
-#import "FLEXUtility.h"
-#import "FLEXLibrariesTableViewController.h"
-#import "FLEXClassesTableViewController.h"
-#import "FLEXObjectExplorerViewController.h"
-#import "FLEXObjectExplorerFactory.h"
-#import "FLEXLiveObjectsTableViewController.h"
-#import "FLEXFileBrowserTableViewController.h"
-#import "FLEXCookiesTableViewController.h"
-#import "FLEXGlobalsTableViewControllerEntry.h"
-#import "FLEXManager+Private.h"
-#import "FLEXSystemLogTableViewController.h"
-#import "FLEXNetworkHistoryTableViewController.h"
-
-static __weak UIWindow *s_applicationWindow = nil;
-
-typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
-    FLEXGlobalsRowNetworkHistory,
-    FLEXGlobalsRowSystemLog,
-    FLEXGlobalsRowLiveObjects,
-    FLEXGlobalsRowFileBrowser,
-    FLEXGlobalsCookies,    
-    FLEXGlobalsRowSystemLibraries,
-    FLEXGlobalsRowAppClasses,
-    FLEXGlobalsRowAppDelegate,
-    FLEXGlobalsRowRootViewController,
-    FLEXGlobalsRowUserDefaults,
-    FLEXGlobalsRowApplication,
-    FLEXGlobalsRowKeyWindow,
-    FLEXGlobalsRowMainScreen,
-    FLEXGlobalsRowCurrentDevice,
-    FLEXGlobalsRowCount
-};
-
-@interface FLEXGlobalsTableViewController ()
-
-/// [FLEXGlobalsTableViewControllerEntry *]
-@property (nonatomic, readonly, copy) NSArray *entries;
-
-@end
-
-@implementation FLEXGlobalsTableViewController
-
-/// [FLEXGlobalsTableViewControllerEntry *]
-+ (NSArray *)defaultGlobalEntries
-{
-    NSMutableArray *defaultGlobalEntries = [NSMutableArray array];
-
-    for (FLEXGlobalsRow defaultRowIndex = 0; defaultRowIndex < FLEXGlobalsRowCount; defaultRowIndex++) {
-        FLEXGlobalsTableViewControllerEntryNameFuture titleFuture = nil;
-        FLEXGlobalsTableViewControllerViewControllerFuture viewControllerFuture = nil;
-
-        switch (defaultRowIndex) {
-            case FLEXGlobalsRowAppClasses:
-                titleFuture = ^NSString *{
-                    return [NSString stringWithFormat:@"📕  %@ Classes", [FLEXUtility applicationName]];
-                };
-                viewControllerFuture = ^UIViewController *{
-                    FLEXClassesTableViewController *classesViewController = [[FLEXClassesTableViewController alloc] init];
-                    classesViewController.binaryImageName = [FLEXUtility applicationImageName];
-
-                    return classesViewController;
-                };
-                break;
-
-            case FLEXGlobalsRowSystemLibraries: {
-                NSString *titleString = @"📚  System Libraries";
-                titleFuture = ^NSString *{
-                    return titleString;
-                };
-                viewControllerFuture = ^UIViewController *{
-                    FLEXLibrariesTableViewController *librariesViewController = [[FLEXLibrariesTableViewController alloc] init];
-                    librariesViewController.title = titleString;
-
-                    return librariesViewController;
-                };
-                break;
-            }
-
-            case FLEXGlobalsRowLiveObjects:
-                titleFuture = ^NSString *{
-                    return @"💩  Heap Objects";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    return [[FLEXLiveObjectsTableViewController alloc] init];
-                };
-
-                break;
-
-            case FLEXGlobalsRowAppDelegate:
-                titleFuture = ^NSString *{
-                    return [NSString stringWithFormat:@"👉  %@", [[[UIApplication sharedApplication] delegate] class]];
-                };
-                viewControllerFuture = ^UIViewController *{
-                    id <UIApplicationDelegate> appDelegate = [[UIApplication sharedApplication] delegate];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:appDelegate];
-                };
-                break;
-
-            case FLEXGlobalsRowRootViewController:
-                titleFuture = ^NSString *{
-                    return [NSString stringWithFormat:@"🌴  %@", [[s_applicationWindow rootViewController] class]];
-                };
-                viewControllerFuture = ^UIViewController *{
-                    UIViewController *rootViewController = [s_applicationWindow rootViewController];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:rootViewController];
-                };
-                break;
-
-            case FLEXGlobalsRowUserDefaults:
-                titleFuture = ^NSString *{
-                    return @"🚶  +[NSUserDefaults standardUserDefaults]";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:standardUserDefaults];
-                };
-                break;
-
-            case FLEXGlobalsRowApplication:
-                titleFuture = ^NSString *{
-                    return @"💾  +[UIApplication sharedApplication]";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    UIApplication *sharedApplication = [UIApplication sharedApplication];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:sharedApplication];
-                };
-                break;
-
-            case FLEXGlobalsRowKeyWindow:
-                titleFuture = ^NSString *{
-                    return @"🔑  -[UIApplication keyWindow]";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:s_applicationWindow];
-                };
-                break;
-
-            case FLEXGlobalsRowMainScreen:
-                titleFuture = ^NSString *{
-                    return @"💻  +[UIScreen mainScreen]";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    UIScreen *mainScreen = [UIScreen mainScreen];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:mainScreen];
-                };
-                break;
-
-            case FLEXGlobalsRowCurrentDevice:
-                titleFuture = ^NSString *{
-                    return @"📱  +[UIDevice currentDevice]";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    UIDevice *currentDevice = [UIDevice currentDevice];
-                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:currentDevice];
-                };
-                break;
-
-            case FLEXGlobalsCookies:
-                titleFuture = ^NSString *{
-                    return @"🍪  Cookies";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    return [[FLEXCookiesTableViewController alloc] init];
-                };
-                break;                
-                
-            case FLEXGlobalsRowFileBrowser:
-                titleFuture = ^NSString *{
-                    return @"📁  File Browser";
-                };
-                viewControllerFuture = ^UIViewController *{
-                    return [[FLEXFileBrowserTableViewController alloc] init];
-                };
-                break;
-
-            case FLEXGlobalsRowSystemLog:
-                titleFuture = ^{
-                    return @"⚠️  System Log";
-                };
-                viewControllerFuture = ^{
-                    return [[FLEXSystemLogTableViewController alloc] init];
-                };
-                break;
-
-            case FLEXGlobalsRowNetworkHistory:
-                titleFuture = ^{
-                    return @"📡  Network History";
-                };
-                viewControllerFuture = ^{
-                    return [[FLEXNetworkHistoryTableViewController alloc] init];
-                };
-                break;
-            case FLEXGlobalsRowCount:
-                break;
-        }
-
-        NSParameterAssert(titleFuture);
-        NSParameterAssert(viewControllerFuture);
-
-        [defaultGlobalEntries addObject:[FLEXGlobalsTableViewControllerEntry entryWithNameFuture:titleFuture viewControllerFuture:viewControllerFuture]];
-    }
-
-    return defaultGlobalEntries;
-}
-
-- (id)initWithStyle:(UITableViewStyle)style
-{
-    self = [super initWithStyle:style];
-    if (self) {
-        self.title = @"💪  FLEX";
-        _entries = [[[self class] defaultGlobalEntries] arrayByAddingObjectsFromArray:[FLEXManager sharedManager].userGlobalEntries];
-    }
-    return self;
-}
-
-#pragma mark - Public
-
-+ (void)setApplicationWindow:(UIWindow *)applicationWindow
-{
-    s_applicationWindow = applicationWindow;
-}
-
-#pragma mark - UIViewController
-
-- (void)viewDidLoad
-{
-    [super viewDidLoad];
-    
-    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(donePressed:)];
-}
-
-#pragma mark -
-
-- (void)donePressed:(id)sender
-{
-    [self.delegate globalsViewControllerDidFinish:self];
-}
-
-#pragma mark - Table Data Helpers
-
-- (FLEXGlobalsTableViewControllerEntry *)globalEntryAtIndexPath:(NSIndexPath *)indexPath
-{
-    return self.entries[indexPath.row];
-}
-
-- (NSString *)titleForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    FLEXGlobalsTableViewControllerEntry *entry = [self globalEntryAtIndexPath:indexPath];
-
-    return entry.entryNameFuture();
-}
-
-- (UIViewController *)viewControllerToPushForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    FLEXGlobalsTableViewControllerEntry *entry = [self globalEntryAtIndexPath:indexPath];
-
-    return entry.viewControllerFuture();
-}
-
-#pragma mark - Table View Data Source
-
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
-{
-    return 1;
-}
-
-- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
-{
-    return [self.entries count];
-}
-
-- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    static NSString *CellIdentifier = @"Cell";
-    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
-    if (!cell) {
-        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
-        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
-        cell.textLabel.font = [FLEXUtility defaultFontOfSize:14.0];
-    }
-
-    cell.textLabel.text = [self titleForRowAtIndexPath:indexPath];
-    
-    return cell;
-}
-
-
-#pragma mark - Table View Delegate
-
-- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    UIViewController *viewControllerToPush = [self viewControllerToPushForRowAtIndexPath:indexPath];
-
-    [self.navigationController pushViewController:viewControllerToPush animated:YES];
-}
-
-@end

Classes/GlobalStateExplorers/FLEXInstancesTableViewController.m

@@ -12,39 +12,79 @@
 #import "FLEXRuntimeUtility.h"
 #import "FLEXUtility.h"
 #import "FLEXHeapEnumerator.h"
+#import "FLEXObjectRef.h"
+#import <malloc/malloc.h>
+
 
 @interface FLEXInstancesTableViewController ()
 
-@property (nonatomic, strong) NSArray *instances;
-@property (nonatomic, strong) NSArray *fieldNames;
+/// Array of [[section], [section], ...]
+/// where [section] is [["row title", instance], ["row title", instance], ...]
+@property (nonatomic) NSArray<FLEXObjectRef *> *instances;
+@property (nonatomic) NSArray<NSArray<FLEXObjectRef*>*> *sections;
+@property (nonatomic) NSArray<NSString *> *sectionTitles;
+@property (nonatomic) NSArray<NSPredicate *> *predicates;
+@property (nonatomic, readonly) NSInteger maxSections;
 
 @end
 
 @implementation FLEXInstancesTableViewController
 
+- (id)initWithReferences:(NSArray<FLEXObjectRef *> *)references {
+    return [self initWithReferences:references predicates:nil sectionTitles:nil];
+}
+
+- (id)initWithReferences:(NSArray<FLEXObjectRef *> *)references
+              predicates:(NSArray<NSPredicate *> *)predicates
+           sectionTitles:(NSArray<NSString *> *)sectionTitles {
+    NSParameterAssert(predicates.count == sectionTitles.count);
+
+    self = [super init];
+    if (self) {
+        self.instances = references;
+        self.predicates = predicates;
+        self.sectionTitles = sectionTitles;
+
+        if (predicates.count) {
+            [self buildSections];
+        } else {
+            self.sections = @[references];
+        }
+    }
+
+    return self;
+}
+
 + (instancetype)instancesTableViewControllerForClassName:(NSString *)className
 {
-    const char *classNameCString = [className UTF8String];
+    const char *classNameCString = className.UTF8String;
     NSMutableArray *instances = [NSMutableArray array];
     [FLEXHeapEnumerator enumerateLiveObjectsUsingBlock:^(__unsafe_unretained id object, __unsafe_unretained Class actualClass) {
         if (strcmp(classNameCString, class_getName(actualClass)) == 0) {
-            // Note: objects of certain classes crash when retain is called. It is up to the user to avoid tapping into instance lists for these classes.
+            // Note: objects of certain classes crash when retain is called.
+            // It is up to the user to avoid tapping into instance lists for these classes.
             // Ex. OS_dispatch_queue_specific_queue
             // In the future, we could provide some kind of warning for classes that are known to be problematic.
-            [instances addObject:object];
+            if (malloc_size((__bridge const void *)(object)) > 0) {
+                [instances addObject:object];
+            }
         }
     }];
-    FLEXInstancesTableViewController *instancesViewController = [[self alloc] init];
-    instancesViewController.instances = instances;
-    instancesViewController.title = [NSString stringWithFormat:@"%@ (%lu)", className, (unsigned long)[instances count]];
-    return instancesViewController;
+    NSArray<FLEXObjectRef *> *references = [FLEXObjectRef referencingAll:instances];
+    FLEXInstancesTableViewController *viewController = [[self alloc] initWithReferences:references];
+    viewController.title = [NSString stringWithFormat:@"%@ (%lu)", className, (unsigned long)instances.count];
+    return viewController;
 }
 
 + (instancetype)instancesTableViewControllerForInstancesReferencingObject:(id)object
 {
-    NSMutableArray *instances = [NSMutableArray array];
-    NSMutableArray *fieldNames = [NSMutableArray array];
+    NSMutableArray<FLEXObjectRef *> *instances = [NSMutableArray array];
     [FLEXHeapEnumerator enumerateLiveObjectsUsingBlock:^(__unsafe_unretained id tryObject, __unsafe_unretained Class actualClass) {
+        // Skip Swift objects
+        if ([actualClass isKindOfClass:NSClassFromString(@"SwiftObject")]) {
+            return;
+        }
+        
         // Get all the ivars on the object. Start with the class and and travel up the inheritance chain.
         // Once we find a match, record it and move on to the next object. There's no reason to find multiple matches within the same object.
         Class tryClass = actualClass;
@@ -54,12 +94,11 @@
             for (unsigned int ivarIndex = 0; ivarIndex < ivarCount; ivarIndex++) {
                 Ivar ivar = ivars[ivarIndex];
                 const char *typeEncoding = ivar_getTypeEncoding(ivar);
-                if (typeEncoding[0] == @encode(id)[0] || typeEncoding[0] == @encode(Class)[0]) {
+                if (typeEncoding[0] == FLEXTypeEncodingObjcObject || typeEncoding[0] == FLEXTypeEncodingObjcClass) {
                     ptrdiff_t offset = ivar_getOffset(ivar);
                     uintptr_t *fieldPointer = (__bridge void *)tryObject + offset;
                     if (*fieldPointer == (uintptr_t)(__bridge void *)object) {
-                        [instances addObject:tryObject];
-                        [fieldNames addObject:@(ivar_getName(ivar))];
+                        [instances addObject:[FLEXObjectRef referencing:tryObject ivar:@(ivar_getName(ivar))]];
                         return;
                     }
                 }
@@ -67,11 +106,85 @@
             tryClass = class_getSuperclass(tryClass);
         }
     }];
-    FLEXInstancesTableViewController *instancesViewController = [[self alloc] init];
-    instancesViewController.instances = instances;
-    instancesViewController.fieldNames = fieldNames;
-    instancesViewController.title = [NSString stringWithFormat:@"Referencing %@ %p", NSStringFromClass(object_getClass(object)), object];
-    return instancesViewController;
+
+    NSArray<NSPredicate *> *predicates = [self defaultPredicates];
+    NSArray<NSString *> *sectionTitles = [self defaultSectionTitles];
+    FLEXInstancesTableViewController *viewController = [[self alloc] initWithReferences:instances
+                                                                             predicates:predicates
+                                                                          sectionTitles:sectionTitles];
+    viewController.title = [NSString stringWithFormat:@"Referencing %@ %p", NSStringFromClass(object_getClass(object)), object];
+    return viewController;
+}
+
++ (NSPredicate *)defaultPredicateForSection:(NSInteger)section
+{
+    // These are the types of references that we typically don't care about.
+    // We want this list of "object-ivar pairs" split into two sections.
+    BOOL(^isObserver)(FLEXObjectRef *, NSDictionary *) = ^BOOL(FLEXObjectRef *ref, NSDictionary *bindings) {
+        NSString *row = ref.reference;
+        return [row isEqualToString:@"__NSObserver object"] ||
+               [row isEqualToString:@"_CFXNotificationObjcObserverRegistration _object"];
+    };
+
+    /// These are common AutoLayout related references we also rarely care about.
+    BOOL(^isConstraintRelated)(FLEXObjectRef *, NSDictionary *) = ^BOOL(FLEXObjectRef *ref, NSDictionary *bindings) {
+        static NSSet *ignored = nil;
+        static dispatch_once_t onceToken;
+        dispatch_once(&onceToken, ^{
+            ignored = [NSSet setWithArray:@[
+                @"NSLayoutConstraint _container",
+                @"NSContentSizeLayoutConstraint _container",
+                @"NSAutoresizingMaskLayoutConstraint _container",
+                @"MASViewConstraint _installedView",
+                @"MASLayoutConstraint _container",
+                @"MASViewAttribute _view"
+            ]];
+        });
+
+        NSString *row = ref.reference;
+        return ([row hasPrefix:@"NSLayout"] && [row hasSuffix:@" _referenceItem"]) ||
+               ([row hasPrefix:@"NSIS"] && [row hasSuffix:@" _delegate"])  ||
+               ([row hasPrefix:@"_NSAutoresizingMask"] && [row hasSuffix:@" _referenceItem"]) ||
+               [ignored containsObject:row];
+    };
+
+    BOOL(^isEssential)(FLEXObjectRef *, NSDictionary *) = ^BOOL(FLEXObjectRef *ref, NSDictionary *bindings) {
+        return !(isObserver(ref, bindings) || isConstraintRelated(ref, bindings));
+    };
+
+    switch (section) {
+        case 0: return [NSPredicate predicateWithBlock:isEssential];
+        case 1: return [NSPredicate predicateWithBlock:isConstraintRelated];
+        case 2: return [NSPredicate predicateWithBlock:isObserver];
+
+        default: return nil;
+    }
+}
+
++ (NSArray<NSPredicate *> *)defaultPredicates {
+    return @[[self defaultPredicateForSection:0],
+             [self defaultPredicateForSection:1],
+             [self defaultPredicateForSection:2]];
+}
+
++ (NSArray<NSString *> *)defaultSectionTitles {
+    return @[@"", @"AutoLayout", @"Trivial"];
+}
+
+- (void)buildSections
+{
+    NSInteger maxSections = self.maxSections;
+    NSMutableArray *sections = [NSMutableArray array];
+    for (NSInteger i = 0; i < maxSections; i++) {
+        NSPredicate *predicate = self.predicates[i];
+        [sections addObject:[self.instances filteredArrayUsingPredicate:predicate]];
+    }
+
+    self.sections = sections;
+}
+
+- (NSInteger)maxSections {
+    return self.predicates.count ?: 1;
 }
 
 
@@ -79,12 +192,12 @@
 
 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
 {
-    return 1;
+    return self.maxSections;
 }
 
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 {
-    return [self.instances count];
+    return self.sections[section].count;
 }
 
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
@@ -97,28 +210,35 @@
         UIFont *cellFont = [FLEXUtility defaultTableViewCellLabelFont];
         cell.textLabel.font = cellFont;
         cell.detailTextLabel.font = cellFont;
-        cell.detailTextLabel.textColor = [UIColor grayColor];
+        cell.detailTextLabel.textColor = UIColor.grayColor;
     }
-    
-    id instance = [self.instances objectAtIndex:indexPath.row];
-    NSString *title = nil;
-    if ((NSInteger)[self.fieldNames count] > indexPath.row) {
-        title = [NSString stringWithFormat:@"%@ %@", NSStringFromClass(object_getClass(instance)), [self.fieldNames objectAtIndex:indexPath.row]];
-    } else {
-        title = [NSString stringWithFormat:@"%@ %p", NSStringFromClass(object_getClass(instance)), instance];
-    }
-    cell.textLabel.text = title;
-    cell.detailTextLabel.text = [FLEXRuntimeUtility descriptionForIvarOrPropertyValue:instance];
+
+    FLEXObjectRef *row = self.sections[indexPath.section][indexPath.row];
+    cell.textLabel.text = row.reference;
+    cell.detailTextLabel.text = [FLEXRuntimeUtility descriptionForIvarOrPropertyValue:row.object];
     
     return cell;
 }
 
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    if (self.sectionTitles.count) {
+        // Return nil instead of empty strings
+        NSString *title = self.sectionTitles[section];
+        if (title.length) {
+            return title;
+        }
+    }
+
+    return nil;
+}
+
 
 #pragma mark - Table View Delegate
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    id instance = [self.instances objectAtIndex:indexPath.row];
+    id instance = self.instances[indexPath.row].object;
     FLEXObjectExplorerViewController *drillInViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:instance];
     [self.navigationController pushViewController:drillInViewController animated:YES];
 }

Classes/GlobalStateExplorers/FLEXLibrariesTableViewController.h

@@ -6,8 +6,9 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
+#import "FLEXTableViewController.h"
+#import "FLEXGlobalsEntry.h"
 
-@interface FLEXLibrariesTableViewController : UITableViewController
+@interface FLEXLibrariesTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
 
 @end

Classes/GlobalStateExplorers/FLEXLibrariesTableViewController.m

@@ -9,14 +9,16 @@
 #import "FLEXLibrariesTableViewController.h"
 #import "FLEXUtility.h"
 #import "FLEXClassesTableViewController.h"
+#import "FLEXObjectExplorerFactory.h"
 #import <objc/runtime.h>
 
-@interface FLEXLibrariesTableViewController () <UISearchBarDelegate>
+@interface FLEXLibrariesTableViewController ()
 
-@property (nonatomic, strong) NSArray *imageNames;
-@property (nonatomic, strong) NSArray *filteredImageNames;
+@property (nonatomic) NSArray<NSString *> *imageNames;
+@property (nonatomic) NSArray<NSString *> *filteredImageNames;
+@property (nonatomic) NSString *headerTitle;
 
-@property (nonatomic, strong) UISearchBar *searchBar;
+@property (nonatomic) Class foundClass;
 
 @end
 
@@ -35,11 +37,37 @@
 {
     [super viewDidLoad];
     
-    self.searchBar = [[UISearchBar alloc] init];
-    self.searchBar.delegate = self;
-    self.searchBar.placeholder = [FLEXUtility searchBarPlaceholderText];
-    [self.searchBar sizeToFit];
-    self.tableView.tableHeaderView = self.searchBar;
+    self.showsSearchBar = YES;
+    [self updateHeaderTitle];
+}
+
+- (void)updateHeaderTitle
+{
+    if (self.foundClass) {
+        self.headerTitle = @"Looking for this?";
+    } else if (self.imageNames.count == self.filteredImageNames.count) {
+        // Unfiltered
+        self.headerTitle = [NSString stringWithFormat:@"%@ libraries", @(self.imageNames.count)];
+    } else {
+        self.headerTitle = [NSString
+            stringWithFormat:@"%@ of %@ libraries",
+            @(self.filteredImageNames.count), @(self.imageNames.count)
+        ];
+    }
+}
+
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    return @"📚  System Libraries";
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    FLEXLibrariesTableViewController *librariesViewController = [self new];
+    librariesViewController.title = [self globalsEntryTitle:row];
+
+    return librariesViewController;
 }
 
 
@@ -50,7 +78,7 @@
     unsigned int imageNamesCount = 0;
     const char **imageNames = objc_copyImageNames(&imageNamesCount);
     if (imageNames) {
-        NSMutableArray *imageNameStrings = [NSMutableArray array];
+        NSMutableArray<NSString *> *imageNameStrings = [NSMutableArray array];
         NSString *appImageName = [FLEXUtility applicationImageName];
         for (unsigned int i = 0; i < imageNamesCount; i++) {
             const char *imageName = imageNames[i];
@@ -63,9 +91,9 @@
         
         // Sort alphabetically
         self.imageNames = [imageNameStrings sortedArrayWithOptions:0 usingComparator:^NSComparisonResult(NSString *name1, NSString *name2) {
-                NSString *shortName1 = [self shortNameForImageName:name1];
-                NSString *shortName2 = [self shortNameForImageName:name2];
-                return [shortName1 caseInsensitiveCompare:shortName2];
+            NSString *shortName1 = [self shortNameForImageName:name1];
+            NSString *shortName2 = [self shortNameForImageName:name2];
+            return [shortName1 caseInsensitiveCompare:shortName2];
         }];
         
         free(imageNames);
@@ -74,16 +102,14 @@
 
 - (NSString *)shortNameForImageName:(NSString *)imageName
 {
-    NSString *shortName = nil;
-    NSArray *components = [imageName componentsSeparatedByString:@"/"];
-    NSUInteger componentsCount = [components count];
-    if (componentsCount >= 2) {
-        shortName = [NSString stringWithFormat:@"%@/%@", components[componentsCount - 2], components[componentsCount - 1]];
+    NSArray<NSString *> *components = [imageName componentsSeparatedByString:@"/"];
+    if (components.count >= 2) {
+        return [NSString stringWithFormat:@"%@/%@", components[components.count - 2], components[components.count - 1]];
     }
-    return shortName;
+    return imageName.lastPathComponent;
 }
 
-- (void)setImageNames:(NSArray *)imageNames
+- (void)setImageNames:(NSArray<NSString *> *)imageNames
 {
     if (![_imageNames isEqual:imageNames]) {
         _imageNames = imageNames;
@@ -94,10 +120,10 @@
 
 #pragma mark - Filtering
 
-- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
+- (void)updateSearchResults:(NSString *)searchText
 {
-    if ([searchText length] > 0) {
-        NSPredicate *searchPreidcate = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
+    if (searchText.length) {
+        NSPredicate *searchPredicate = [NSPredicate predicateWithBlock:^BOOL(NSString *evaluatedObject, NSDictionary<NSString *, id> *bindings) {
             BOOL matches = NO;
             NSString *shortName = [self shortNameForImageName:evaluatedObject];
             if ([shortName rangeOfString:searchText options:NSCaseInsensitiveSearch].length > 0) {
@@ -105,55 +131,69 @@
             }
             return matches;
         }];
-        self.filteredImageNames = [self.imageNames filteredArrayUsingPredicate:searchPreidcate];
+        self.filteredImageNames = [self.imageNames filteredArrayUsingPredicate:searchPredicate];
     } else {
         self.filteredImageNames = self.imageNames;
     }
+    
+    self.foundClass = NSClassFromString(searchText);
+    [self updateHeaderTitle];
     [self.tableView reloadData];
 }
 
-- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
-{
-    [searchBar resignFirstResponder];
-}
-
 
 #pragma mark - Table View Data Source
 
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
-{
-    return 1;
-}
-
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 {
-    return [self.filteredImageNames count];
+    return self.filteredImageNames.count + (self.foundClass ? 1 : 0);
 }
 
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    static NSString *CellIdentifier = @"Cell";
-    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+    static NSString *cellIdentifier = @"Cell";
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
     if (!cell) {
-        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
         cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
         cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
     }
     
-    NSString *fullImageName = self.filteredImageNames[indexPath.row];
-    cell.textLabel.text = [self shortNameForImageName:fullImageName];
+    NSString *executablePath;
+    if (self.foundClass) {
+        if (indexPath.row == 0) {
+            cell.textLabel.text = [NSString stringWithFormat:@"Class \"%@\"", self.searchText];
+            return cell;
+        } else {
+            executablePath = self.filteredImageNames[indexPath.row-1];
+        }
+    } else {
+        executablePath = self.filteredImageNames[indexPath.row];
+    }
     
+    cell.textLabel.text = [self shortNameForImageName:executablePath];
     return cell;
 }
 
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return self.headerTitle;
+}
+
 
 #pragma mark - Table View Delegate
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    FLEXClassesTableViewController *classesViewController = [[FLEXClassesTableViewController alloc] init];
-    classesViewController.binaryImageName = self.filteredImageNames[indexPath.row];
-    [self.navigationController pushViewController:classesViewController animated:YES];
+    if (indexPath.row == 0 && self.foundClass) {
+        [self.navigationController pushViewController:[FLEXObjectExplorerFactory
+            explorerViewControllerForObject:self.foundClass
+        ] animated:YES];
+    } else {
+        [self.navigationController pushViewController:[FLEXClassesTableViewController
+            binaryImageName:self.filteredImageNames[self.foundClass ? 0 : indexPath.row]
+        ] animated:YES];
+    }
 }
 
 @end

Classes/GlobalStateExplorers/FLEXLiveObjectsTableViewController.h

@@ -6,8 +6,9 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
+#import "FLEXTableViewController.h"
+#import "FLEXGlobalsEntry.h"
 
-@interface FLEXLiveObjectsTableViewController : UITableViewController
+@interface FLEXLiveObjectsTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
 
 @end

Classes/GlobalStateExplorers/FLEXLiveObjectsTableViewController.m

@@ -10,43 +10,50 @@
 #import "FLEXHeapEnumerator.h"
 #import "FLEXInstancesTableViewController.h"
 #import "FLEXUtility.h"
+#import "FLEXScopeCarousel.h"
+#import "FLEXTableView.h"
 #import <objc/runtime.h>
 
 static const NSInteger kFLEXLiveObjectsSortAlphabeticallyIndex = 0;
 static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
+static const NSInteger kFLEXLiveObjectsSortBySizeIndex = 2;
 
-@interface FLEXLiveObjectsTableViewController () <UISearchBarDelegate>
+@interface FLEXLiveObjectsTableViewController ()
 
-@property (nonatomic, strong) NSDictionary *instanceCountsForClassNames;
-@property (nonatomic, readonly) NSArray *allClassNames;
-@property (nonatomic, strong) NSArray *filteredClassNames;
-@property (nonatomic, strong) UISearchBar *searchBar;
+@property (nonatomic) NSDictionary<NSString *, NSNumber *> *instanceCountsForClassNames;
+@property (nonatomic) NSDictionary<NSString *, NSNumber *> *instanceSizesForClassNames;
+@property (nonatomic, readonly) NSArray<NSString *> *allClassNames;
+@property (nonatomic) NSArray<NSString *> *filteredClassNames;
+@property (nonatomic) NSString *headerTitle;
 
 @end
 
 @implementation FLEXLiveObjectsTableViewController
 
+- (void)loadView
+{
+    self.tableView = [FLEXTableView flexDefaultTableView];
+}
+
 - (void)viewDidLoad
 {
     [super viewDidLoad];
+
+//    self.title = @"Live Objects";
+    self.showsSearchBar = YES;
+    self.searchBarDebounceInterval = kFLEXDebounceInstant;
+    self.showsCarousel = YES;
+    self.carousel.items = @[@"A→Z", @"Count", @"Size"];
     
-    self.searchBar = [[UISearchBar alloc] init];
-    self.searchBar.placeholder = [FLEXUtility searchBarPlaceholderText];
-    self.searchBar.delegate = self;
-    self.searchBar.showsScopeBar = YES;
-    self.searchBar.scopeButtonTitles = @[@"Sort Alphabetically", @"Sort by Count"];
-    [self.searchBar sizeToFit];
-    self.tableView.tableHeaderView = self.searchBar;
-    
-    self.refreshControl = [[UIRefreshControl alloc] init];
+    self.refreshControl = [UIRefreshControl new];
     [self.refreshControl addTarget:self action:@selector(refreshControlDidRefresh:) forControlEvents:UIControlEventValueChanged];
     
     [self reloadTableData];
 }
 
-- (NSArray *)allClassNames
+- (NSArray<NSString *> *)allClassNames
 {
-    return [self.instanceCountsForClassNames allKeys];
+    return self.instanceCountsForClassNames.allKeys;
 }
 
 - (void)reloadTableData
@@ -72,20 +79,23 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     }];
     
     // Convert our CF primitive dictionary into a nicer mapping of class name strings to counts that we will use as the table's model.
-    NSMutableDictionary *mutableCountsForClassNames = [NSMutableDictionary dictionary];
+    NSMutableDictionary<NSString *, NSNumber *> *mutableCountsForClassNames = [NSMutableDictionary dictionary];
+    NSMutableDictionary<NSString *, NSNumber *> *mutableSizesForClassNames = [NSMutableDictionary dictionary];
     for (unsigned int i = 0; i < classCount; i++) {
         Class class = classes[i];
         NSUInteger instanceCount = (NSUInteger)CFDictionaryGetValue(mutableCountsForClasses, (__bridge const void *)(class));
+        NSString *className = @(class_getName(class));
         if (instanceCount > 0) {
-            NSString *className = @(class_getName(class));
             [mutableCountsForClassNames setObject:@(instanceCount) forKey:className];
         }
+        [mutableSizesForClassNames setObject:@(class_getInstanceSize(class)) forKey:className];
     }
     free(classes);
     
     self.instanceCountsForClassNames = mutableCountsForClassNames;
+    self.instanceSizesForClassNames = mutableSizesForClassNames;
     
-    [self updateTableDataForSearchFilter];
+    [self updateSearchResults:nil];
 }
 
 - (void)refreshControlDidRefresh:(id)sender
@@ -94,74 +104,93 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     [self.refreshControl endRefreshing];
 }
 
-- (void)updateTitle
+- (void)updateHeaderTitle
 {
-    NSString *title = @"Live Objects";
-    
     NSUInteger totalCount = 0;
+    NSUInteger totalSize = 0;
     for (NSString *className in self.allClassNames) {
-        totalCount += [[self.instanceCountsForClassNames objectForKey:className] unsignedIntegerValue];
+        NSUInteger count = self.instanceCountsForClassNames[className].unsignedIntegerValue;
+        totalCount += count;
+        totalSize += count * self.instanceSizesForClassNames[className].unsignedIntegerValue;
     }
+
     NSUInteger filteredCount = 0;
+    NSUInteger filteredSize = 0;
     for (NSString *className in self.filteredClassNames) {
-        filteredCount += [[self.instanceCountsForClassNames objectForKey:className] unsignedIntegerValue];
+        NSUInteger count = self.instanceCountsForClassNames[className].unsignedIntegerValue;
+        filteredCount += count;
+        filteredSize += count * self.instanceSizesForClassNames[className].unsignedIntegerValue;
     }
     
     if (filteredCount == totalCount) {
         // Unfiltered
-        title = [title stringByAppendingFormat:@" (%lu)", (unsigned long)totalCount];
+        self.headerTitle = [NSString
+            stringWithFormat:@"%@ objects, %@",
+            @(totalCount), [NSByteCountFormatter
+                stringFromByteCount:totalSize
+                countStyle:NSByteCountFormatterCountStyleFile
+            ]
+        ];
     } else {
-        title = [title stringByAppendingFormat:@" (filtered, %lu)", (unsigned long)filteredCount];
+        self.headerTitle = [NSString
+            stringWithFormat:@"%@ of %@ objects, %@",
+            @(filteredCount), @(totalCount), [NSByteCountFormatter
+                stringFromByteCount:filteredSize
+                countStyle:NSByteCountFormatterCountStyleFile
+            ]
+        ];
     }
+}
+
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    return @"💩  Heap Objects";
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    FLEXLiveObjectsTableViewController *liveObjectsViewController = [self new];
+    liveObjectsViewController.title = [self globalsEntryTitle:row];
+
+    return liveObjectsViewController;
+}
+
+
+#pragma mark - Search bar
+
+- (void)updateSearchResults:(NSString *)filter
+{
+    NSInteger selectedScope = self.selectedScope;
     
-    self.title = title;
-}
-
-
-#pragma mark - Search
-
-- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
-{
-    [self updateTableDataForSearchFilter];
-}
-
-- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
-{
-    [searchBar resignFirstResponder];
-}
-
-- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope
-{
-    [self updateTableDataForSearchFilter];
-}
-
-- (void)scrollViewDidScroll:(UIScrollView *)scrollView
-{
-    // Dismiss the keyboard when interacting with filtered results.
-    [self.searchBar endEditing:YES];
-}
-
-- (void)updateTableDataForSearchFilter
-{
-    if ([self.searchBar.text length] > 0) {
-        NSPredicate *searchPreidcate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", self.searchBar.text];
-        self.filteredClassNames = [self.allClassNames filteredArrayUsingPredicate:searchPreidcate];
+    if (filter.length) {
+        NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", filter];
+        self.filteredClassNames = [self.allClassNames filteredArrayUsingPredicate:searchPredicate];
     } else {
         self.filteredClassNames = self.allClassNames;
     }
     
-    if (self.searchBar.selectedScopeButtonIndex == kFLEXLiveObjectsSortAlphabeticallyIndex) {
+    if (selectedScope == kFLEXLiveObjectsSortAlphabeticallyIndex) {
         self.filteredClassNames = [self.filteredClassNames sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
-    } else if (self.searchBar.selectedScopeButtonIndex == kFLEXLiveObjectsSortByCountIndex) {
+    } else if (selectedScope == kFLEXLiveObjectsSortByCountIndex) {
         self.filteredClassNames = [self.filteredClassNames sortedArrayUsingComparator:^NSComparisonResult(NSString *className1, NSString *className2) {
-            NSNumber *count1 = [self.instanceCountsForClassNames objectForKey:className1];
-            NSNumber *count2 = [self.instanceCountsForClassNames objectForKey:className2];
+            NSNumber *count1 = self.instanceCountsForClassNames[className1];
+            NSNumber *count2 = self.instanceCountsForClassNames[className2];
             // Reversed for descending counts.
             return [count2 compare:count1];
         }];
+    } else if (selectedScope == kFLEXLiveObjectsSortBySizeIndex) {
+        self.filteredClassNames = [self.filteredClassNames sortedArrayUsingComparator:^NSComparisonResult(NSString *className1, NSString *className2) {
+            NSNumber *count1 = self.instanceCountsForClassNames[className1];
+            NSNumber *count2 = self.instanceCountsForClassNames[className2];
+            NSNumber *size1 = self.instanceSizesForClassNames[className1];
+            NSNumber *size2 = self.instanceSizesForClassNames[className2];
+            // Reversed for descending sizes.
+            return [@(count2.integerValue * size2.integerValue) compare:@(count1.integerValue * size1.integerValue)];
+        }];
     }
     
-    [self updateTitle];
+    [self updateHeaderTitle];
     [self.tableView reloadData];
 }
 
@@ -175,32 +204,43 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
 
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 {
-    return [self.filteredClassNames count];
+    return self.filteredClassNames.count;
 }
 
-- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+- (UITableViewCell *)tableView:(__kindof UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    static NSString *CellIdentifier = @"Cell";
-    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
-    if (!cell) {
-        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
-        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
-        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
-    }
-    
+    UITableViewCell *cell = [tableView
+        dequeueReusableCellWithIdentifier:kFLEXDefaultCell
+        forIndexPath:indexPath
+    ];
+
     NSString *className = self.filteredClassNames[indexPath.row];
-    NSNumber *count = [self.instanceCountsForClassNames objectForKey:className];
-    cell.textLabel.text = [NSString stringWithFormat:@"%@ (%ld)", className, (long)[count integerValue]];
+    NSNumber *count = self.instanceCountsForClassNames[className];
+    NSNumber *size = self.instanceSizesForClassNames[className];
+    unsigned long totalSize = count.unsignedIntegerValue * size.unsignedIntegerValue;
+    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+    cell.textLabel.text = [NSString stringWithFormat:@"%@ (%ld, %@)",
+        className, (long)[count integerValue],
+        [NSByteCountFormatter
+            stringFromByteCount:totalSize
+            countStyle:NSByteCountFormatterCountStyleFile
+        ]
+    ];
     
     return cell;
 }
 
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return self.headerTitle;
+}
+
 
 #pragma mark - Table view delegate
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    NSString *className = [self.filteredClassNames objectAtIndex:indexPath.row];
+    NSString *className = self.filteredClassNames[indexPath.row];
     FLEXInstancesTableViewController *instancesViewController = [FLEXInstancesTableViewController instancesTableViewControllerForClassName:className];
     [self.navigationController pushViewController:instancesViewController animated:YES];
 }

Classes/GlobalStateExplorers/FLEXObjectRef.h

@@ -0,0 +1,22 @@
+//
+//  FLEXObjectRef.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/24/18.
+//  Copyright (c) 2018 Flipboard. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface FLEXObjectRef : NSObject
+
++ (instancetype)referencing:(id)object;
++ (instancetype)referencing:(id)object ivar:(NSString *)ivarName;
+
++ (NSArray<FLEXObjectRef *> *)referencingAll:(NSArray *)objects;
+
+/// For example, "NSString 0x1d4085d0" or "NSLayoutConstraint _object"
+@property (nonatomic, readonly) NSString *reference;
+@property (nonatomic, readonly) id object;
+
+@end

Classes/GlobalStateExplorers/FLEXObjectRef.m

@@ -0,0 +1,47 @@
+//
+//  FLEXObjectRef.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 7/24/18.
+//  Copyright (c) 2018 Flipboard. All rights reserved.
+//
+
+#import "FLEXObjectRef.h"
+#import <objc/runtime.h>
+
+@implementation FLEXObjectRef
+
++ (instancetype)referencing:(id)object {
+    return [[self alloc] initWithObject:object ivarName:nil];
+}
+
++ (instancetype)referencing:(id)object ivar:(NSString *)ivarName {
+    return [[self alloc] initWithObject:object ivarName:ivarName];
+}
+
++ (NSArray<FLEXObjectRef *> *)referencingAll:(NSArray *)objects {
+    NSMutableArray<FLEXObjectRef *> *refs = [NSMutableArray array];
+    for (id obj in objects) {
+        [refs addObject:[self referencing:obj]];
+    }
+
+    return refs;
+}
+
+- (id)initWithObject:(id)object ivarName:(NSString *)ivar {
+    self = [super init];
+    if (self) {
+        _object = object;
+
+        NSString *class = NSStringFromClass(object_getClass(object));
+        if (ivar) {
+            _reference = [NSString stringWithFormat:@"%@ %@", class, ivar];
+        } else {
+            _reference = [NSString stringWithFormat:@"%@ %p", class, object];
+        }
+    }
+
+    return self;
+}
+
+@end

Classes/GlobalStateExplorers/FLEXWebViewController.m

@@ -8,11 +8,12 @@
 
 #import "FLEXWebViewController.h"
 #import "FLEXUtility.h"
+#import <WebKit/WebKit.h>
 
-@interface FLEXWebViewController () <UIWebViewDelegate>
+@interface FLEXWebViewController () <WKNavigationDelegate>
 
-@property (nonatomic, strong) UIWebView *webView;
-@property (nonatomic, strong) NSString *originalText;
+@property (nonatomic) WKWebView *webView;
+@property (nonatomic) NSString *originalText;
 
 @end
 
@@ -22,10 +23,14 @@
 {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
-        self.webView = [[UIWebView alloc] init];
-        self.webView.delegate = self;
-        self.webView.dataDetectorTypes = UIDataDetectorTypeLink;
-        self.webView.scalesPageToFit = YES;
+        WKWebViewConfiguration *configuration = [WKWebViewConfiguration new];
+
+        if (@available(iOS 10.0, *)) {
+            configuration.dataDetectorTypes = UIDataDetectorTypeLink;
+        }
+
+        self.webView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:configuration];
+        self.webView.navigationDelegate = self;
     }
     return self;
 }
@@ -53,9 +58,9 @@
 
 - (void)dealloc
 {
-    // UIWebView's delegate is assign so we need to clear it manually.
-    if (_webView.delegate == self) {
-        _webView.delegate = nil;
+    // WKWebView's delegate is assigned so we need to clear it manually.
+    if (_webView.navigationDelegate == self) {
+        _webView.navigationDelegate = nil;
     }
 }
 
@@ -67,33 +72,34 @@
     self.webView.frame = self.view.bounds;
     self.webView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
     
-    if ([self.originalText length] > 0) {
+    if (self.originalText.length > 0) {
         self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Copy" style:UIBarButtonItemStylePlain target:self action:@selector(copyButtonTapped:)];
     }
 }
 
 - (void)copyButtonTapped:(id)sender
 {
-    [[UIPasteboard generalPasteboard] setString:self.originalText];
+    [UIPasteboard.generalPasteboard setString:self.originalText];
 }
 
 
-#pragma mark - UIWebView Delegate
+#pragma mark - WKWebView Delegate
 
-- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
+- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
 {
-    BOOL shouldStart = NO;
-    if (navigationType == UIWebViewNavigationTypeOther) {
+    WKNavigationActionPolicy policy = WKNavigationActionPolicyCancel;
+    if (navigationAction.navigationType == WKNavigationTypeOther) {
         // Allow the initial load
-        shouldStart = YES;
+        policy = WKNavigationActionPolicyAllow;
     } else {
         // For clicked links, push another web view controller onto the navigation stack so that hitting the back button works as expected.
-        // Don't allow the current web view do handle the navigation.
+        // Don't allow the current web view to handle the navigation.
+        NSURLRequest *request = navigationAction.request;
         FLEXWebViewController *webVC = [[[self class] alloc] initWithURL:[request URL]];
         webVC.title = [[request URL] absoluteString];
         [self.navigationController pushViewController:webVC animated:YES];
     }
-    return shouldStart;
+    decisionHandler(policy);
 }
 
 
@@ -102,26 +108,26 @@
 + (BOOL)supportsPathExtension:(NSString *)extension
 {
     BOOL supported = NO;
-    NSSet *supportedExtensions = [self webViewSupportedPathExtensions];
+    NSSet<NSString *> *supportedExtensions = [self webViewSupportedPathExtensions];
     if ([supportedExtensions containsObject:[extension lowercaseString]]) {
         supported = YES;
     }
     return supported;
 }
 
-+ (NSSet *)webViewSupportedPathExtensions
++ (NSSet<NSString *> *)webViewSupportedPathExtensions
 {
-    static NSSet *pathExtenstions = nil;
+    static NSSet<NSString *> *pathExtensions = nil;
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
         // Note that this is not exhaustive, but all these extensions should work well in the web view.
-        // See https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/CreatingContentforSafarioniPhone/CreatingContentforSafarioniPhone.html#//apple_ref/doc/uid/TP40006482-SW7
-        pathExtenstions = [NSSet setWithArray:@[@"jpg", @"jpeg", @"png", @"gif", @"pdf", @"svg", @"tiff", @"3gp", @"3gpp", @"3g2",
-                                                @"3gp2", @"aiff", @"aif", @"aifc", @"cdda", @"amr", @"mp3", @"swa", @"mp4", @"mpeg",
-                                                @"mpg", @"mp3", @"wav", @"bwf", @"m4a", @"m4b", @"m4p", @"mov", @"qt", @"mqv", @"m4v"]];
+        // See https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/CreatingContentforSafarioniPhone/CreatingContentforSafarioniPhone.html#//apple_ref/doc/uid/TP40006482-SW7
+        pathExtensions = [NSSet<NSString *> setWithArray:@[@"jpg", @"jpeg", @"png", @"gif", @"pdf", @"svg", @"tiff", @"3gp", @"3gpp", @"3g2",
+                                                           @"3gp2", @"aiff", @"aif", @"aifc", @"cdda", @"amr", @"mp3", @"swa", @"mp4", @"mpeg",
+                                                           @"mpg", @"mp3", @"wav", @"bwf", @"m4a", @"m4b", @"m4p", @"mov", @"qt", @"mqv", @"m4v"]];
         
     });
-    return pathExtenstions;
+    return pathExtensions;
 }
 
 @end

Classes/GlobalStateExplorers/FileBrowser/FLEXFileBrowserSearchOperation.h

@@ -1,6 +1,6 @@
 //
 //  FLEXFileBrowserSearchOperation.h
-//  UICatalog
+//  FLEX
 //
 //  Created by 啟倫 陳 on 2014/8/4.
 //  Copyright (c) 2014年 f. All rights reserved.
@@ -20,6 +20,6 @@
 
 @protocol FLEXFileBrowserSearchOperationDelegate <NSObject>
 
-- (void)fileBrowserSearchOperationResult:(NSArray *)searchResult size:(uint64_t)size;
+- (void)fileBrowserSearchOperationResult:(NSArray<NSString *> *)searchResult size:(uint64_t)size;
 
 @end

Classes/GlobalStateExplorers/FileBrowser/FLEXFileBrowserSearchOperation.m

@@ -1,6 +1,6 @@
 //
 //  FLEXFileBrowserSearchOperation.m
-//  UICatalog
+//  FLEX
 //
 //  Created by 啟倫 陳 on 2014/8/4.
 //  Copyright (c) 2014年 f. All rights reserved.
@@ -17,7 +17,7 @@
 
 - (id)flex_pop
 {
-    id anObject = [self lastObject];
+    id anObject = self.lastObject;
     [self removeLastObject];
     return anObject;
 }
@@ -26,8 +26,8 @@
 
 @interface FLEXFileBrowserSearchOperation ()
 
-@property (nonatomic, strong) NSString *path;
-@property (nonatomic, strong) NSString *searchString;
+@property (nonatomic) NSString *path;
+@property (nonatomic) NSString *searchString;
 
 @end
 
@@ -37,8 +37,8 @@
 
 - (uint64_t)totalSizeAtPath:(NSString *)path
 {
-    NSFileManager *fileManager = [NSFileManager defaultManager];
-    NSDictionary *attributes = [fileManager attributesOfItemAtPath:path error:NULL];
+    NSFileManager *fileManager = NSFileManager.defaultManager;
+    NSDictionary<NSString *, id> *attributes = [fileManager attributesOfItemAtPath:path error:NULL];
     uint64_t totalSize = [attributes fileSize];
     
     for (NSString *fileName in [fileManager enumeratorAtPath:path]) {
@@ -64,17 +64,17 @@
 
 - (void)main
 {
-    NSFileManager *fileManager = [NSFileManager defaultManager];
-    NSMutableArray *searchPaths = [NSMutableArray array];
-    NSMutableDictionary *sizeMapping = [NSMutableDictionary dictionary];
+    NSFileManager *fileManager = NSFileManager.defaultManager;
+    NSMutableArray<NSString *> *searchPaths = [NSMutableArray array];
+    NSMutableDictionary<NSString *, NSNumber *> *sizeMapping = [NSMutableDictionary dictionary];
     uint64_t totalSize = 0;
-    NSMutableArray *stack = [NSMutableArray array];
+    NSMutableArray<NSString *> *stack = [NSMutableArray array];
     [stack flex_push:self.path];
     
     //recursive found all match searchString paths, and precomputing there size
-    while ([stack count]) {
+    while (stack.count) {
         NSString *currentPath = [stack flex_pop];
-        NSArray *directoryPath = [fileManager contentsOfDirectoryAtPath:currentPath error:nil];
+        NSArray<NSString *> *directoryPath = [fileManager contentsOfDirectoryAtPath:currentPath error:nil];
         
         for (NSString *subPath in directoryPath) {
             NSString *fullPath = [currentPath stringByAppendingPathComponent:subPath];
@@ -99,7 +99,7 @@
     }
     
     //sort
-    NSArray *sortedArray = [searchPaths sortedArrayUsingComparator:^NSComparisonResult(NSString *path1, NSString *path2) {
+    NSArray<NSString *> *sortedArray = [searchPaths sortedArrayUsingComparator:^NSComparisonResult(NSString *path1, NSString *path2) {
         uint64_t pathSize1 = [sizeMapping[path1] unsignedLongLongValue];
         uint64_t pathSize2 = [sizeMapping[path2] unsignedLongLongValue];
         if (pathSize1 < pathSize2) {

Classes/GlobalStateExplorers/FileBrowser/FLEXFileBrowserTableViewController.h

@@ -6,12 +6,13 @@
 //  Based on previous work by Evan Doll
 //
 
-#import <UIKit/UIKit.h>
-
+#import "FLEXTableViewController.h"
+#import "FLEXGlobalsEntry.h"
 #import "FLEXFileBrowserSearchOperation.h"
 
-@interface FLEXFileBrowserTableViewController : UITableViewController <UISearchDisplayDelegate, FLEXFileBrowserSearchOperationDelegate>
+@interface FLEXFileBrowserTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
 
++ (instancetype)path:(NSString *)path;
 - (id)initWithPath:(NSString *)path;
 
 @end

Classes/GlobalStateExplorers/FileBrowser/FLEXFileBrowserTableViewController.m

@@ -0,0 +1,506 @@
+//
+//  FLEXFileBrowserTableViewController.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 6/9/14.
+//
+//
+
+#import "FLEXFileBrowserTableViewController.h"
+#import "FLEXUtility.h"
+#import "FLEXWebViewController.h"
+#import "FLEXImagePreviewViewController.h"
+#import "FLEXTableListViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXObjectExplorerViewController.h"
+
+@interface FLEXFileBrowserTableViewCell : UITableViewCell
+@end
+
+@interface FLEXFileBrowserTableViewController () <FLEXFileBrowserSearchOperationDelegate>
+
+@property (nonatomic, copy) NSString *path;
+@property (nonatomic, copy) NSArray<NSString *> *childPaths;
+@property (nonatomic) NSArray<NSString *> *searchPaths;
+@property (nonatomic) NSNumber *recursiveSize;
+@property (nonatomic) NSNumber *searchPathsSize;
+@property (nonatomic) NSOperationQueue *operationQueue;
+@property (nonatomic) UIDocumentInteractionController *documentController;
+
+@end
+
+@implementation FLEXFileBrowserTableViewController
+
++ (instancetype)path:(NSString *)path
+{
+    return [[self alloc] initWithPath:path];
+}
+
+- (id)init
+{
+    return [self initWithPath:NSHomeDirectory()];
+}
+
+- (id)initWithPath:(NSString *)path
+{
+    self = [super init];
+    if (self) {
+        self.path = path;
+        self.title = [path lastPathComponent];
+        self.operationQueue = [NSOperationQueue new];
+        
+        
+        //computing path size
+        FLEXFileBrowserTableViewController *__weak weakSelf = self;
+        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+            NSFileManager *fileManager = NSFileManager.defaultManager;
+            NSDictionary<NSString *, id> *attributes = [fileManager attributesOfItemAtPath:path error:NULL];
+            uint64_t totalSize = [attributes fileSize];
+
+            for (NSString *fileName in [fileManager enumeratorAtPath:path]) {
+                attributes = [fileManager attributesOfItemAtPath:[path stringByAppendingPathComponent:fileName] error:NULL];
+                totalSize += [attributes fileSize];
+
+                // Bail if the interested view controller has gone away.
+                if (!weakSelf) {
+                    return;
+                }
+            }
+
+            dispatch_async(dispatch_get_main_queue(), ^{
+                FLEXFileBrowserTableViewController *__strong strongSelf = weakSelf;
+                strongSelf.recursiveSize = @(totalSize);
+                [strongSelf.tableView reloadData];
+            });
+        });
+
+        [self reloadCurrentPath];
+    }
+    return self;
+}
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    
+    self.showsSearchBar = YES;
+    self.searchBarDebounceInterval = kFLEXDebounceForAsyncSearch;
+}
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row {
+    switch (row) {
+        case FLEXGlobalsRowBrowseBundle: return @"📁  Browse Bundle Directory";
+        case FLEXGlobalsRowBrowseContainer: return @"📁  Browse Container Directory";
+        default: return nil;
+    }
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    switch (row) {
+        case FLEXGlobalsRowBrowseBundle: return [[self alloc] initWithPath:NSBundle.mainBundle.bundlePath];
+        case FLEXGlobalsRowBrowseContainer: return [[self alloc] initWithPath:NSHomeDirectory()];
+        default: return [self new];
+    }
+}
+
+#pragma mark - FLEXFileBrowserSearchOperationDelegate
+
+- (void)fileBrowserSearchOperationResult:(NSArray<NSString *> *)searchResult size:(uint64_t)size
+{
+    self.searchPaths = searchResult;
+    self.searchPathsSize = @(size);
+    [self.tableView reloadData];
+}
+
+#pragma mark - Search bar
+
+- (void)updateSearchResults:(NSString *)newText
+{
+    [self reloadDisplayedPaths];
+}
+
+#pragma mark UISearchControllerDelegate
+
+- (void)willDismissSearchController:(UISearchController *)searchController
+{
+    [self.operationQueue cancelAllOperations];
+    [self reloadCurrentPath];
+    [self.tableView reloadData];
+}
+
+#pragma mark - Table view data source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    return 1;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.searchController.isActive ? self.searchPaths.count : self.childPaths.count;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    BOOL isSearchActive = self.searchController.isActive;
+    NSNumber *currentSize = isSearchActive ? self.searchPathsSize : self.recursiveSize;
+    NSArray<NSString *> *currentPaths = isSearchActive ? self.searchPaths : self.childPaths;
+
+    NSString *sizeString = nil;
+    if (!currentSize) {
+        sizeString = @"Computing size…";
+    } else {
+        sizeString = [NSByteCountFormatter stringFromByteCount:[currentSize longLongValue] countStyle:NSByteCountFormatterCountStyleFile];
+    }
+
+    return [NSString stringWithFormat:@"%lu files (%@)", (unsigned long)currentPaths.count, sizeString];
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+    NSDictionary<NSString *, id> *attributes = [NSFileManager.defaultManager attributesOfItemAtPath:fullPath error:NULL];
+    BOOL isDirectory = [attributes.fileType isEqual:NSFileTypeDirectory];
+    NSString *subtitle = nil;
+    if (isDirectory) {
+        NSUInteger count = [NSFileManager.defaultManager contentsOfDirectoryAtPath:fullPath error:NULL].count;
+        subtitle = [NSString stringWithFormat:@"%lu item%@", (unsigned long)count, (count == 1 ? @"" : @"s")];
+    } else {
+        NSString *sizeString = [NSByteCountFormatter stringFromByteCount:attributes.fileSize countStyle:NSByteCountFormatterCountStyleFile];
+        subtitle = [NSString stringWithFormat:@"%@ - %@", sizeString, attributes.fileModificationDate ?: @"Never modified"];
+    }
+
+    static NSString *textCellIdentifier = @"textCell";
+    static NSString *imageCellIdentifier = @"imageCell";
+    UITableViewCell *cell = nil;
+
+    // Separate image and text only cells because otherwise the separator lines get out-of-whack on image cells reused with text only.
+    UIImage *image = [UIImage imageWithContentsOfFile:fullPath];
+    NSString *cellIdentifier = image ? imageCellIdentifier : textCellIdentifier;
+
+    if (!cell) {
+        cell = [[FLEXFileBrowserTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
+        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.detailTextLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.detailTextLabel.textColor = UIColor.grayColor;
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+    }
+    NSString *cellTitle = [fullPath lastPathComponent];
+    cell.textLabel.text = cellTitle;
+    cell.detailTextLabel.text = subtitle;
+
+    if (image) {
+        cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
+        cell.imageView.image = image;
+    }
+
+    return cell;
+}
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    [self.tableView deselectRowAtIndexPath:indexPath animated:YES];
+
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+    NSString *subpath = fullPath.lastPathComponent;
+    NSString *pathExtension = subpath.pathExtension;
+
+    BOOL isDirectory = NO;
+    BOOL stillExists = [NSFileManager.defaultManager fileExistsAtPath:fullPath isDirectory:&isDirectory];
+    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
+    UIImage *image = cell.imageView.image;
+
+    if (!stillExists) {
+        [FLEXAlert showAlert:@"File Not Found" message:@"The file at the specified path no longer exists." from:self];
+        [self reloadDisplayedPaths];
+        return;
+    }
+
+    UIViewController *drillInViewController = nil;
+    if (isDirectory) {
+        drillInViewController = [[[self class] alloc] initWithPath:fullPath];
+    } else if (image) {
+        drillInViewController = [[FLEXImagePreviewViewController alloc] initWithImage:image];
+    } else {
+        NSData *fileData = [NSData dataWithContentsOfFile:fullPath];
+        if (!fileData.length) {
+            [FLEXAlert showAlert:@"Empty File" message:@"No data returned from the file." from:self];
+            return;
+        }
+
+        // Special case keyed archives, json, and plists to get more readable data.
+        NSString *prettyString = nil;
+        if ([pathExtension isEqualToString:@"json"]) {
+            prettyString = [FLEXUtility prettyJSONStringFromData:fileData];
+        } else {
+            // Regardless of file extension...
+            
+            id object = nil;
+            @try {
+                // Try to decode an archived object regardless of file extension
+                object = [NSKeyedUnarchiver unarchiveObjectWithData:fileData];
+            } @catch (NSException *e) { }
+            
+            // Try to decode other things instead
+            object = object
+                        ?: [NSPropertyListSerialization propertyListWithData:fileData
+                                                                     options:0
+                                                                      format:NULL
+                                                                       error:NULL]
+                        ?: [NSDictionary dictionaryWithContentsOfFile:fullPath]
+                        ?: [NSArray arrayWithContentsOfFile:fullPath];
+            
+            if (object) {
+                drillInViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:object];
+            }
+        }
+
+        if (prettyString.length) {
+            drillInViewController = [[FLEXWebViewController alloc] initWithText:prettyString];
+        } else if ([FLEXWebViewController supportsPathExtension:pathExtension]) {
+            drillInViewController = [[FLEXWebViewController alloc] initWithURL:[NSURL fileURLWithPath:fullPath]];
+        } else if ([FLEXTableListViewController supportsExtension:pathExtension]) {
+            drillInViewController = [[FLEXTableListViewController alloc] initWithPath:fullPath];
+        }
+        else if (!drillInViewController) {
+            NSString *fileString = [NSString stringWithUTF8String:fileData.bytes];
+            if (fileString.length) {
+                drillInViewController = [[FLEXWebViewController alloc] initWithText:fileString];
+            }
+        }
+    }
+
+    if (drillInViewController) {
+        drillInViewController.title = subpath.lastPathComponent;
+        [self.navigationController pushViewController:drillInViewController animated:YES];
+    } else {
+        // Share the file otherwise
+        [self openFileController:fullPath];
+    }
+}
+
+- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    UIMenuItem *rename = [[UIMenuItem alloc] initWithTitle:@"Rename" action:@selector(fileBrowserRename:)];
+    UIMenuItem *delete = [[UIMenuItem alloc] initWithTitle:@"Delete" action:@selector(fileBrowserDelete:)];
+    UIMenuItem *copyPath = [[UIMenuItem alloc] initWithTitle:@"Copy Path" action:@selector(fileBrowserCopyPath:)];
+    UIMenuItem *share = [[UIMenuItem alloc] initWithTitle:@"Share" action:@selector(fileBrowserShare:)];
+
+    UIMenuController.sharedMenuController.menuItems = @[rename, delete, copyPath, share];
+
+    return YES;
+}
+
+- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
+{
+    return action == @selector(fileBrowserDelete:)
+        || action == @selector(fileBrowserRename:)
+        || action == @selector(fileBrowserCopyPath:)
+        || action == @selector(fileBrowserShare:);
+}
+
+- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
+{
+    // Empty, but has to exist for the menu to show
+    // The table view only calls this method for actions in the UIResponderStandardEditActions informal protocol.
+    // Since our actions are outside of that protocol, we need to manually handle the action forwarding from the cells.
+}
+
+#if FLEX_AT_LEAST_IOS13_SDK
+
+- (UIContextMenuConfiguration *)tableView:(UITableView *)tableView contextMenuConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath point:(CGPoint)point __IOS_AVAILABLE(13.0)
+{
+    __weak typeof(self) weakSelf = self;
+    return [UIContextMenuConfiguration configurationWithIdentifier:nil
+                                                   previewProvider:nil
+                                                    actionProvider:^UIMenu * _Nullable(NSArray<UIMenuElement *> * _Nonnull suggestedActions) {
+        UITableViewCell * const cell = [tableView cellForRowAtIndexPath:indexPath];
+        UIAction *rename = [UIAction actionWithTitle:@"Rename"
+                                               image:nil
+                                          identifier:@"Rename"
+                                             handler:^(__kindof UIAction * _Nonnull action) {
+            [weakSelf fileBrowserRename:cell];
+        }];
+        UIAction *delete = [UIAction actionWithTitle:@"Delete"
+                                               image:nil
+                                          identifier:@"Delete"
+                                             handler:^(__kindof UIAction * _Nonnull action) {
+            [weakSelf fileBrowserDelete:cell];
+        }];
+        UIAction *copyPath = [UIAction actionWithTitle:@"Copy Path"
+                                                 image:nil
+                                            identifier:@"Copy Path"
+                                               handler:^(__kindof UIAction * _Nonnull action) {
+            [weakSelf fileBrowserCopyPath:cell];
+        }];
+        UIAction *share = [UIAction actionWithTitle:@"Share"
+                                              image:nil
+                                         identifier:@"Share"
+                                            handler:^(__kindof UIAction * _Nonnull action) {
+            [weakSelf fileBrowserShare:cell];
+        }];
+        return [UIMenu menuWithTitle:@"Manage File" image:nil identifier:@"Manage File" options:UIMenuOptionsDisplayInline children:@[rename, delete, copyPath, share]];
+    }];
+}
+
+#endif
+
+- (void)openFileController:(NSString *)fullPath
+{
+    UIDocumentInteractionController *controller = [UIDocumentInteractionController new];
+    controller.URL = [NSURL fileURLWithPath:fullPath];
+
+    [controller presentOptionsMenuFromRect:self.view.bounds inView:self.view animated:YES];
+    self.documentController = controller;
+}
+
+- (void)fileBrowserRename:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+
+    BOOL stillExists = [NSFileManager.defaultManager fileExistsAtPath:self.path isDirectory:NULL];
+    if (stillExists) {
+        [FLEXAlert makeAlert:^(FLEXAlert *make) {
+            make.title([NSString stringWithFormat:@"Rename %@?", fullPath.lastPathComponent]);
+            make.configuredTextField(^(UITextField *textField) {
+                textField.placeholder = @"New file name";
+                textField.text = fullPath.lastPathComponent;
+            });
+            make.button(@"Rename").handler(^(NSArray<NSString *> *strings) {
+                NSString *newFileName = strings.firstObject;
+                NSString *newPath = [fullPath.stringByDeletingLastPathComponent stringByAppendingPathComponent:newFileName];
+                [NSFileManager.defaultManager moveItemAtPath:fullPath toPath:newPath error:NULL];
+                [self reloadDisplayedPaths];
+            });
+            make.button(@"Cancel").cancelStyle();
+        } showFrom:self];
+    } else {
+        [FLEXAlert showAlert:@"File Removed" message:@"The file at the specified path no longer exists." from:self];
+    }
+}
+
+- (void)fileBrowserDelete:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+
+    BOOL isDirectory = NO;
+    BOOL stillExists = [NSFileManager.defaultManager fileExistsAtPath:fullPath isDirectory:&isDirectory];
+    if (stillExists) {
+        [FLEXAlert makeAlert:^(FLEXAlert *make) {
+            make.title(@"Confirm Deletion");
+            make.message([NSString stringWithFormat:
+                @"The %@ '%@' will be deleted. This operation cannot be undone",
+                (isDirectory ? @"directory" : @"file"), fullPath.lastPathComponent
+            ]);
+            make.button(@"Delete").destructiveStyle().handler(^(NSArray<NSString *> *strings) {
+                [NSFileManager.defaultManager removeItemAtPath:fullPath error:NULL];
+                [self reloadDisplayedPaths];
+            });
+            make.button(@"Cancel").cancelStyle();
+        } showFrom:self];
+    } else {
+        [FLEXAlert showAlert:@"File Removed" message:@"The file at the specified path no longer exists." from:self];
+    }
+}
+
+- (void)fileBrowserCopyPath:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+    UIPasteboard.generalPasteboard.string = fullPath;
+}
+
+- (void)fileBrowserShare:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *pathString = [self filePathAtIndexPath:indexPath];
+    NSURL *filePath = [NSURL fileURLWithPath:pathString];
+
+    BOOL isDirectory = NO;
+    [NSFileManager.defaultManager fileExistsAtPath:pathString isDirectory:&isDirectory];
+
+    if (isDirectory) {
+        // UIDocumentInteractionController for folders
+        [self openFileController:pathString];
+    } else {
+        // Share sheet for files
+        UIActivityViewController *shareSheet = [[UIActivityViewController alloc] initWithActivityItems:@[filePath] applicationActivities:nil];
+        [self presentViewController:shareSheet animated:true completion:nil];
+    }
+}
+
+- (void)reloadDisplayedPaths
+{
+    if (self.searchController.isActive) {
+        [self updateSearchPaths];
+    } else {
+        [self reloadCurrentPath];
+        [self.tableView reloadData];
+    }
+}
+
+- (void)reloadCurrentPath
+{
+    NSMutableArray<NSString *> *childPaths = [NSMutableArray array];
+    NSArray<NSString *> *subpaths = [NSFileManager.defaultManager contentsOfDirectoryAtPath:self.path error:NULL];
+    for (NSString *subpath in subpaths) {
+        [childPaths addObject:[self.path stringByAppendingPathComponent:subpath]];
+    }
+    self.childPaths = childPaths;
+}
+
+- (void)updateSearchPaths
+{
+    self.searchPaths = nil;
+    self.searchPathsSize = nil;
+
+    //clear pre search request and start a new one
+    [self.operationQueue cancelAllOperations];
+    FLEXFileBrowserSearchOperation *newOperation = [[FLEXFileBrowserSearchOperation alloc] initWithPath:self.path searchString:self.searchText];
+    newOperation.delegate = self;
+    [self.operationQueue addOperation:newOperation];
+}
+
+- (NSString *)filePathAtIndexPath:(NSIndexPath *)indexPath
+{
+    return self.searchController.isActive ? self.searchPaths[indexPath.row] : self.childPaths[indexPath.row];
+}
+
+@end
+
+
+@implementation FLEXFileBrowserTableViewCell
+
+- (void)forwardAction:(SEL)action withSender:(id)sender
+{
+    id target = [self.nextResponder targetForAction:action withSender:sender];
+    [UIApplication.sharedApplication sendAction:action to:target from:self forEvent:nil];
+}
+
+- (void)fileBrowserRename:(UIMenuController *)sender
+{
+    [self forwardAction:_cmd withSender:sender];
+}
+
+- (void)fileBrowserDelete:(UIMenuController *)sender
+{
+    [self forwardAction:_cmd withSender:sender];
+}
+
+- (void)fileBrowserCopyPath:(UIMenuController *)sender
+{
+    [self forwardAction:_cmd withSender:sender];
+}
+
+- (void)fileBrowserShare:(UIMenuController *)sender
+{
+    [self forwardAction:_cmd withSender:sender];
+}
+
+@end

Classes/GlobalStateExplorers/Globals/FLEXGlobalsEntry.h

@@ -0,0 +1,81 @@
+//
+//  FLEXGlobalsEntry.h
+//  FLEX
+//
+//  Created by Javier Soto on 7/26/14.
+//  Copyright (c) 2014 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "FLEXTableViewSection.h"
+@class FLEXGlobalsTableViewController;
+
+typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
+    FLEXGlobalsRowProcessInfo,
+    FLEXGlobalsRowNetworkHistory,
+    FLEXGlobalsRowSystemLog,
+    FLEXGlobalsRowLiveObjects,
+    FLEXGlobalsRowAddressInspector,
+    FLEXGlobalsRowCookies,
+    FLEXGlobalsRowSystemLibraries,
+    FLEXGlobalsRowAppClasses,
+    FLEXGlobalsRowAppKeychainItems,
+    FLEXGlobalsRowAppDelegate,
+    FLEXGlobalsRowRootViewController,
+    FLEXGlobalsRowUserDefaults,
+    FLEXGlobalsRowMainBundle,
+    FLEXGlobalsRowBrowseBundle,
+    FLEXGlobalsRowBrowseContainer,
+    FLEXGlobalsRowApplication,
+    FLEXGlobalsRowKeyWindow,
+    FLEXGlobalsRowMainScreen,
+    FLEXGlobalsRowCurrentDevice,
+    FLEXGlobalsRowPasteboard,
+    FLEXGlobalsRowCount
+};
+
+typedef NSString *(^FLEXGlobalsEntryNameFuture)(void);
+/// Simply return a view controller to be pushed on the navigation stack
+typedef UIViewController *(^FLEXGlobalsTableViewControllerViewControllerFuture)(void);
+/// Do something like present an alert, then use the host
+/// view controller to present or push another view controller.
+typedef void (^FLEXGlobalsTableViewControllerRowAction)(FLEXGlobalsTableViewController *host);
+
+/// For view controllers to conform to to indicate they support being used
+/// in the globals table view controller. These methods help create concrete entries.
+///
+/// Previously, the concrete entries relied on "futures" for the view controller and title.
+/// With this protocol, the conforming class itself can act as a future, since the methods
+/// will not be invoked until the title and view controller / row action are needed.
+@protocol FLEXGlobalsEntry <NSObject>
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row;
+
+// Must respond to at least one of the below
+@optional
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row;
++ (FLEXGlobalsTableViewControllerRowAction)globalsEntryRowAction:(FLEXGlobalsRow)row;
+
+@end
+
+@interface FLEXGlobalsEntry : NSObject <FLEXPatternMatching>
+
+@property (nonatomic, readonly) FLEXGlobalsEntryNameFuture entryNameFuture;
+@property (nonatomic, readonly) FLEXGlobalsTableViewControllerViewControllerFuture viewControllerFuture;
+@property (nonatomic, readonly) FLEXGlobalsTableViewControllerRowAction rowAction;
+
++ (instancetype)entryWithEntry:(Class<FLEXGlobalsEntry>)entry row:(FLEXGlobalsRow)row;
++ (instancetype)entryWithNameFuture:(FLEXGlobalsEntryNameFuture)nameFuture viewControllerFuture:(FLEXGlobalsTableViewControllerViewControllerFuture)viewControllerFuture;
++ (instancetype)entryWithNameFuture:(FLEXGlobalsEntryNameFuture)nameFuture action:(FLEXGlobalsTableViewControllerRowAction)rowSelectedAction;
+
+@end
+
+
+@interface NSObject (FLEXGlobalsEntry)
+
+/// @return The result of passing self to +[FLEXGlobalsEntry entryWithEntry:]
+/// if the class conforms to FLEXGlobalsEntry, else, nil.
++ (FLEXGlobalsEntry *)flex_concreteGlobalsEntry:(FLEXGlobalsRow)row;
+
+@end

Classes/GlobalStateExplorers/Globals/FLEXGlobalsEntry.m

@@ -0,0 +1,80 @@
+//
+//  FLEXGlobalsEntry.m
+//  FLEX
+//
+//  Created by Javier Soto on 7/26/14.
+//  Copyright (c) 2014 f. All rights reserved.
+//
+
+#import "FLEXGlobalsEntry.h"
+
+@implementation FLEXGlobalsEntry
+
++ (instancetype)entryWithEntry:(Class<FLEXGlobalsEntry>)cls row:(FLEXGlobalsRow)row
+{
+    NSParameterAssert(cls);
+    NSParameterAssert(
+        [cls respondsToSelector:@selector(globalsEntryViewController:)] ||
+        [cls respondsToSelector:@selector(globalsEntryRowAction:)]
+    );
+
+    FLEXGlobalsEntry *entry = [self new];
+    entry->_entryNameFuture = ^{ return [cls globalsEntryTitle:row]; };
+
+    if ([cls respondsToSelector:@selector(globalsEntryViewController:)]) {
+        entry->_viewControllerFuture = ^{ return [cls globalsEntryViewController:row]; };
+    } else {
+        entry->_rowAction = [cls globalsEntryRowAction:row];
+    }
+
+    return entry;
+}
+
++ (instancetype)entryWithNameFuture:(FLEXGlobalsEntryNameFuture)nameFuture
+               viewControllerFuture:(FLEXGlobalsTableViewControllerViewControllerFuture)viewControllerFuture
+{
+    NSParameterAssert(nameFuture);
+    NSParameterAssert(viewControllerFuture);
+
+    FLEXGlobalsEntry *entry = [self new];
+    entry->_entryNameFuture = [nameFuture copy];
+    entry->_viewControllerFuture = [viewControllerFuture copy];
+
+    return entry;
+}
+
++ (instancetype)entryWithNameFuture:(FLEXGlobalsEntryNameFuture)nameFuture
+                             action:(FLEXGlobalsTableViewControllerRowAction)rowSelectedAction
+{
+    NSParameterAssert(nameFuture);
+    NSParameterAssert(rowSelectedAction);
+
+    FLEXGlobalsEntry *entry = [self new];
+    entry->_entryNameFuture = [nameFuture copy];
+    entry->_rowAction = [rowSelectedAction copy];
+
+    return entry;
+}
+
+#pragma mark FLEXPatternMatching
+
+- (BOOL)matches:(NSString *)query
+{
+    return [self.entryNameFuture() localizedCaseInsensitiveContainsString:query];
+}
+
+@end
+
+#pragma mark - flex_concreteGlobalsEntry
+
+@implementation NSObject (FLEXGlobalsEntry)
+
++ (FLEXGlobalsEntry *)flex_concreteGlobalsEntry:(FLEXGlobalsRow)row {
+    if ([self conformsToProtocol:@protocol(FLEXGlobalsEntry)]) {
+        return [FLEXGlobalsEntry entryWithEntry:self row:row];
+    }
+
+    return nil;
+}
+
+@end

Classes/GlobalStateExplorers/Globals/FLEXGlobalsTableViewController.h

@@ -6,11 +6,24 @@
 //  Copyright (c) 2014 Flipboard. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
-
+#import "FLEXTableViewController.h"
 @protocol FLEXGlobalsTableViewControllerDelegate;
 
-@interface FLEXGlobalsTableViewController : UITableViewController
+typedef NS_ENUM(NSUInteger, FLEXGlobalsSection) {
+    /// NSProcessInfo, Network history, system log,
+    /// heap, address explorer, libraries, app classes
+    FLEXGlobalsSectionProcessAndEvents,
+    /// Browse container, browse bundle, NSBundle.main,
+    /// NSUserDefaults.standard, UIApplication,
+    /// app delegate, key window, root VC, cookies
+    FLEXGlobalsSectionAppShortcuts,
+    /// UIPasteBoard.general, UIScreen, UIDevice
+    FLEXGlobalsSectionMisc,
+    FLEXGlobalsSectionCustom,
+    FLEXGlobalsSectionCount
+};
+
+@interface FLEXGlobalsTableViewController : FLEXTableViewController
 
 @property (nonatomic, weak) id <FLEXGlobalsTableViewControllerDelegate> delegate;
 

Classes/GlobalStateExplorers/Globals/FLEXGlobalsTableViewController.m

@@ -0,0 +1,292 @@
+//
+//  FLEXGlobalsTableViewController.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 2014-05-03.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import "FLEXGlobalsTableViewController.h"
+#import "FLEXUtility.h"
+#import "FLEXRuntimeUtility.h"
+#import "FLEXLibrariesTableViewController.h"
+#import "FLEXClassesTableViewController.h"
+#import "FLEXKeychainTableViewController.h"
+#import "FLEXObjectExplorerViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXLiveObjectsTableViewController.h"
+#import "FLEXFileBrowserTableViewController.h"
+#import "FLEXCookiesTableViewController.h"
+#import "FLEXGlobalsEntry.h"
+#import "FLEXManager+Private.h"
+#import "FLEXSystemLogTableViewController.h"
+#import "FLEXNetworkHistoryTableViewController.h"
+#import "FLEXAddressExplorerCoordinator.h"
+#import "FLEXTableViewSection.h"
+
+static __weak UIWindow *s_applicationWindow = nil;
+
+@interface FLEXGlobalsTableViewController ()
+
+@property (nonatomic, readonly) NSArray<FLEXTableViewSection<FLEXGlobalsEntry *> *> *sections;
+@property (nonatomic, copy) NSArray<FLEXTableViewSection<FLEXGlobalsEntry *> *> *filteredSections;
+
+@end
+
+@implementation FLEXGlobalsTableViewController
+
++ (NSString *)globalsTitleForSection:(FLEXGlobalsSection)section
+{
+    switch (section) {
+        case FLEXGlobalsSectionProcessAndEvents:
+            return @"Process and Events";
+        case FLEXGlobalsSectionAppShortcuts:
+            return @"App Shortcuts";
+        case FLEXGlobalsSectionMisc:
+            return @"Miscellaneous";
+        case FLEXGlobalsSectionCustom:
+            return @"Custom Additions";
+
+        default:
+            @throw NSInternalInconsistencyException;
+    }
+}
+
++ (FLEXGlobalsEntry *)globalsEntryForRow:(FLEXGlobalsRow)row
+{
+    switch (row) {
+        case FLEXGlobalsRowAppClasses:
+            return [FLEXClassesTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowAppKeychainItems:
+            return [FLEXKeychainTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowAddressInspector:
+            return [FLEXAddressExplorerCoordinator flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowSystemLibraries:
+            return [FLEXLibrariesTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowLiveObjects:
+            return [FLEXLiveObjectsTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowCookies:
+            return [FLEXCookiesTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowBrowseBundle:
+        case FLEXGlobalsRowBrowseContainer:
+            return [FLEXFileBrowserTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowSystemLog:
+            return [FLEXSystemLogTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowNetworkHistory:
+            return [FLEXNetworkHistoryTableViewController flex_concreteGlobalsEntry:row];
+        case FLEXGlobalsRowKeyWindow:
+            return [FLEXGlobalsEntry
+                entryWithNameFuture:^NSString *{
+                    return @"🔑  -[UIApplication keyWindow]";
+                } viewControllerFuture:^UIViewController *{
+                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:s_applicationWindow];
+                }
+            ];
+        case FLEXGlobalsRowRootViewController:
+        case FLEXGlobalsRowProcessInfo:
+        case FLEXGlobalsRowAppDelegate:
+        case FLEXGlobalsRowUserDefaults:
+        case FLEXGlobalsRowMainBundle:
+        case FLEXGlobalsRowApplication:
+        case FLEXGlobalsRowMainScreen:
+        case FLEXGlobalsRowCurrentDevice:
+        case FLEXGlobalsRowPasteboard:
+            return [FLEXObjectExplorerFactory flex_concreteGlobalsEntry:row];
+
+        default:
+            @throw [NSException
+                exceptionWithName:NSInternalInconsistencyException
+                reason:@"Missing globals case in switch" userInfo:nil
+            ];
+    }
+}
+
++ (NSArray<FLEXTableViewSection<FLEXGlobalsEntry *> *> *)defaultGlobalSections
+{
+    static NSArray<FLEXTableViewSection<FLEXGlobalsEntry *> *> *sections = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        NSArray *rows = @[
+            @[
+                [self globalsEntryForRow:FLEXGlobalsRowNetworkHistory],
+                [self globalsEntryForRow:FLEXGlobalsRowSystemLog],
+                [self globalsEntryForRow:FLEXGlobalsRowProcessInfo],
+                [self globalsEntryForRow:FLEXGlobalsRowLiveObjects],
+                [self globalsEntryForRow:FLEXGlobalsRowAddressInspector],
+                [self globalsEntryForRow:FLEXGlobalsRowSystemLibraries],
+                [self globalsEntryForRow:FLEXGlobalsRowAppClasses],
+            ],
+            @[ // FLEXGlobalsSectionAppShortcuts
+                [self globalsEntryForRow:FLEXGlobalsRowBrowseBundle],
+                [self globalsEntryForRow:FLEXGlobalsRowBrowseContainer],
+                [self globalsEntryForRow:FLEXGlobalsRowMainBundle],
+                [self globalsEntryForRow:FLEXGlobalsRowUserDefaults],
+                [self globalsEntryForRow:FLEXGlobalsRowAppKeychainItems],
+                [self globalsEntryForRow:FLEXGlobalsRowApplication],
+                [self globalsEntryForRow:FLEXGlobalsRowAppDelegate],
+                [self globalsEntryForRow:FLEXGlobalsRowKeyWindow],
+                [self globalsEntryForRow:FLEXGlobalsRowRootViewController],
+                [self globalsEntryForRow:FLEXGlobalsRowCookies],
+            ],
+            @[ // FLEXGlobalsSectionMisc
+                [self globalsEntryForRow:FLEXGlobalsRowPasteboard],
+                [self globalsEntryForRow:FLEXGlobalsRowMainScreen],
+                [self globalsEntryForRow:FLEXGlobalsRowCurrentDevice],
+            ]
+        ];
+        
+        NSMutableArray *tmp = [NSMutableArray array];
+        for (NSInteger i = 0; i < FLEXGlobalsSectionCount - 1; i++) { // Skip custom
+            NSString *title = [self globalsTitleForSection:i];
+            [tmp addObject:[FLEXTableViewSection section:i title:title rows:rows[i]]];
+        }
+        
+        sections = tmp.copy;
+    });
+    
+    return sections;
+}
+
+#pragma mark - Public
+
++ (void)setApplicationWindow:(UIWindow *)applicationWindow
+{
+    s_applicationWindow = applicationWindow;
+}
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    self.title = @"💪  FLEX";
+    self.showsSearchBar = YES;
+    self.searchBarDebounceInterval = kFLEXDebounceInstant;
+
+    // Table view data
+    _sections = [[self class] defaultGlobalSections];
+    if ([FLEXManager sharedManager].userGlobalEntries.count) {
+        // Make custom section
+        NSString *title = [[self class] globalsTitleForSection:FLEXGlobalsSectionCustom];
+        FLEXTableViewSection *custom = [FLEXTableViewSection
+            section:FLEXGlobalsSectionCustom
+            title:title
+            rows:[FLEXManager sharedManager].userGlobalEntries
+        ];
+        _sections = [_sections arrayByAddingObject:custom];
+    }
+
+    // Done button
+    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
+        initWithBarButtonSystemItem:UIBarButtonSystemItemDone
+        target:self
+        action:@selector(donePressed:)
+    ];
+}
+
+#pragma mark - Search Bar
+
+- (void)updateSearchResults:(NSString *)newText {
+    if (!newText.length) {
+        self.filteredSections = nil;
+        [self.tableView reloadData];
+        return;
+    }
+
+    // Sections are a map of index to rows, since empty sections are omitted
+    NSMutableArray *filteredSections = [NSMutableArray array];
+
+    [self.sections enumerateObjectsUsingBlock:^(FLEXTableViewSection<FLEXGlobalsEntry *> *section, NSUInteger idx, BOOL *stop) {
+        section = [section newSectionWithRowsMatchingQuery:newText];
+        if (section) {
+            [filteredSections addObject:section];
+        }
+    }];
+
+    self.filteredSections = filteredSections.copy;
+    [self.tableView reloadData];
+}
+
+#pragma mark - Misc
+
+- (void)donePressed:(id)sender
+{
+    [self.delegate globalsViewControllerDidFinish:self];
+}
+
+#pragma mark - Table Data Helpers
+
+- (FLEXGlobalsEntry *)globalEntryAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (self.filteredSections) {
+        return self.filteredSections[indexPath.section][indexPath.row];
+    } else {
+        return self.sections[indexPath.section][indexPath.row];
+    }
+}
+
+- (NSString *)titleForSection:(NSInteger)section
+{
+    if (self.filteredSections) {
+        return self.filteredSections[section].title;
+    } else {
+        return self.sections[section].title;
+    }
+}
+
+- (NSString *)titleForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXGlobalsEntry *entry = [self globalEntryAtIndexPath:indexPath];
+    return entry.entryNameFuture();
+}
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    return self.filteredSections ? self.filteredSections.count : self.sections.count;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    if (self.filteredSections) {
+        return self.filteredSections[section].count;
+    } else {
+        return self.sections[section].count;
+    }
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    static NSString *CellIdentifier = @"Cell";
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+    if (!cell) {
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+        cell.textLabel.font = [FLEXUtility defaultFontOfSize:14.0];
+    }
+
+    cell.textLabel.text = [self titleForRowAtIndexPath:indexPath];
+    
+    return cell;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return [self titleForSection:section];
+}
+
+#pragma mark - Table View Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXGlobalsEntry *entry = [self globalEntryAtIndexPath:indexPath];
+    if (entry.viewControllerFuture) {
+        [self.navigationController pushViewController:entry.viewControllerFuture() animated:YES];
+    } else {
+        entry.rowAction(self);
+    }
+}
+
+@end

Classes/GlobalStateExplorers/Keychain/FLEXKeychain.h

@@ -0,0 +1,141 @@
+//
+//  FLEXKeychain.h
+//
+//  Derived from:
+//  SSKeychain.h in SSKeychain
+//  Created by Sam Soffes on 5/19/10.
+//  Copyright (c) 2010-2014 Sam Soffes. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+/// Error code specific to FLEXKeychain that can be returned in NSError objects.
+/// For codes returned by the operating system, refer to SecBase.h for your
+/// platform.
+typedef NS_ENUM(OSStatus, FLEXKeychainErrorCode) {
+    /// Some of the arguments were invalid.
+    FLEXKeychainErrorBadArguments = -1001,
+};
+
+/// FLEXKeychain error domain
+extern NSString *const kFLEXKeychainErrorDomain;
+
+/// Account name.
+extern NSString *const kFLEXKeychainAccountKey;
+
+/// Time the item was created.
+///
+/// The value will be a string.
+extern NSString *const kFLEXKeychainCreatedAtKey;
+
+/// Item class.
+extern NSString *const kFLEXKeychainClassKey;
+
+/// Item description.
+extern NSString *const kFLEXKeychainDescriptionKey;
+
+/// Item label.
+extern NSString *const kFLEXKeychainLabelKey;
+
+/// Time the item was last modified.
+///
+/// The value will be a string.
+extern NSString *const kFLEXKeychainLastModifiedKey;
+
+/// Where the item was created.
+extern NSString *const kFLEXKeychainWhereKey;
+
+/// A simple wrapper for accessing accounts, getting passwords,
+/// setting passwords, and deleting passwords using the system Keychain.
+@interface FLEXKeychain : NSObject
+
+#pragma mark - Classic methods
+
+/// @param serviceName The service for which to return the corresponding password.
+/// @param account The account for which to return the corresponding password.
+/// @return Returns a string containing the password for a given account and service,
+/// or `nil` if the Keychain doesn't have a password for the given parameters.
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account;
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error;
+
+/// Returns a nsdata containing the password for a given account and service,
+/// or `nil` if the Keychain doesn't have a password for the given parameters.
+///
+/// @param serviceName The service for which to return the corresponding password.
+/// @param account The account for which to return the corresponding password.
+/// @return Returns a nsdata containing the password for a given account and service,
+/// or `nil` if the Keychain doesn't have a password for the given parameters.
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account;
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error;
+
+
+/// Deletes a password from the Keychain.
+///
+/// @param serviceName The service for which to delete the corresponding password.
+/// @param account The account for which to delete the corresponding password.
+/// @return Returns `YES` on success, or `NO` on failure.
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account;
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error;
+
+
+/// Sets a password in the Keychain.
+///
+/// @param password The password to store in the Keychain.
+/// @param serviceName The service for which to set the corresponding password.
+/// @param account The account for which to set the corresponding password.
+/// @return Returns `YES` on success, or `NO` on failure.
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account;
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error;
+
+/// Sets a password in the Keychain.
+///
+/// @param password The password to store in the Keychain.
+/// @param serviceName The service for which to set the corresponding password.
+/// @param account The account for which to set the corresponding password.
+/// @return Returns `YES` on success, or `NO` on failure.
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account;
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error;
+
+/// @return An array of dictionaries containing the Keychain's accounts, or `nil` if
+/// the Keychain doesn't have any accounts. The order of the objects in the array isn't defined.
+///
+/// @note See the `NSString` constants declared in FLEXKeychain.h for a list of keys that
+/// can be used when accessing the dictionaries returned by this method.
++ (NSArray<NSDictionary<NSString *, id> *> *)allAccounts;
++ (NSArray<NSDictionary<NSString *, id> *> *)allAccounts:(NSError *__autoreleasing *)error;
+
+/// @param serviceName The service for which to return the corresponding accounts.
+/// @return An array of dictionaries containing the Keychain's accounts for a given `serviceName`,
+/// or `nil` if the Keychain doesn't have any accounts for the given `serviceName`.
+/// The order of the objects in the array isn't defined.
+///
+/// @note See the `NSString` constants declared in FLEXKeychain.h for a list of keys that
+/// can be used when accessing the dictionaries returned by this method.
++ (NSArray<NSDictionary<NSString *, id> *> *)accountsForService:(NSString *)serviceName;
++ (NSArray<NSDictionary<NSString *, id> *> *)accountsForService:(NSString *)serviceName error:(NSError *__autoreleasing *)error;
+
+
+#pragma mark - Configuration
+
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+/// Returns the accessibility type for all future passwords saved to the Keychain.
+///
+/// @return `NULL` or one of the "Keychain Item Accessibility
+/// Constants" used for determining when a keychain item should be readable.
++ (CFTypeRef)accessibilityType;
+
+/// Sets the accessibility type for all future passwords saved to the Keychain.
+///
+/// @param accessibilityType One of the "Keychain Item Accessibility Constants"
+/// used for determining when a keychain item should be readable.
+/// If the value is `NULL` (the default), the Keychain default will be used which
+/// is highly insecure. You really should use at least `kSecAttrAccessibleAfterFirstUnlock`
+/// for background applications or `kSecAttrAccessibleWhenUnlocked` for all
+/// other applications.
+///
+/// @note See Security/SecItem.h
++ (void)setAccessibilityType:(CFTypeRef)accessibilityType;
+#endif
+
+@end
+

Classes/GlobalStateExplorers/Keychain/FLEXKeychain.m

@@ -0,0 +1,120 @@
+//
+//  FLEXKeychain.m
+//
+//  Forked from:
+//  SSKeychain.m in SSKeychain
+//  Created by Sam Soffes on 5/19/10.
+//  Copyright (c) 2010-2014 Sam Soffes. All rights reserved.
+//
+
+#import "FLEXKeychain.h"
+#import "FLEXKeychainQuery.h"
+
+NSString * const kFLEXKeychainErrorDomain = @"com.flipboard.flex";
+NSString * const kFLEXKeychainAccountKey = @"acct";
+NSString * const kFLEXKeychainCreatedAtKey = @"cdat";
+NSString * const kFLEXKeychainClassKey = @"labl";
+NSString * const kFLEXKeychainDescriptionKey = @"desc";
+NSString * const kFLEXKeychainLabelKey = @"labl";
+NSString * const kFLEXKeychainLastModifiedKey = @"mdat";
+NSString * const kFLEXKeychainWhereKey = @"svce";
+
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+static CFTypeRef FLEXKeychainAccessibilityType = NULL;
+#endif
+
+@implementation FLEXKeychain
+
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account {
+    return [self passwordForService:serviceName account:account error:nil];
+}
+
++ (NSString *)passwordForService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    [query fetch:error];
+    return query.password;
+}
+
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account {
+    return [self passwordDataForService:serviceName account:account error:nil];
+}
+
++ (NSData *)passwordDataForService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    [query fetch:error];
+    
+    return query.passwordData;
+}
+
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account {
+    return [self deletePasswordForService:serviceName account:account error:nil];
+}
+
++ (BOOL)deletePasswordForService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    return [query deleteItem:error];
+}
+
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account {
+    return [self setPassword:password forService:serviceName account:account error:nil];
+}
+
++ (BOOL)setPassword:(NSString *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    query.password = password;
+    return [query save:error];
+}
+
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account {
+    return [self setPasswordData:password forService:serviceName account:account error:nil];
+}
+
++ (BOOL)setPasswordData:(NSData *)password forService:(NSString *)serviceName account:(NSString *)account error:(NSError **)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    query.account = account;
+    query.passwordData = password;
+    return [query save:error];
+}
+
++ (NSArray *)allAccounts {
+    return [self allAccounts:nil];
+}
+
++ (NSArray *)allAccounts:(NSError *__autoreleasing *)error {
+    return [self accountsForService:nil error:error];
+}
+
++ (NSArray *)accountsForService:(NSString *)serviceName {
+    return [self accountsForService:serviceName error:nil];
+}
+
++ (NSArray *)accountsForService:(NSString *)serviceName error:(NSError *__autoreleasing *)error {
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = serviceName;
+    return [query fetchAll:error];
+}
+
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
++ (CFTypeRef)accessibilityType {
+    return FLEXKeychainAccessibilityType;
+}
+
++ (void)setAccessibilityType:(CFTypeRef)accessibilityType {
+    CFRetain(accessibilityType);
+    if (FLEXKeychainAccessibilityType) {
+        CFRelease(FLEXKeychainAccessibilityType);
+    }
+    FLEXKeychainAccessibilityType = accessibilityType;
+}
+#endif
+
+@end

Classes/GlobalStateExplorers/Keychain/FLEXKeychainQuery.h

@@ -0,0 +1,112 @@
+//
+//  FLEXKeychainQuery.h
+//
+//  Derived from:
+//  SSKeychainQuery.h in SSKeychain
+//  Created by Caleb Davenport on 3/19/13.
+//  Copyright (c) 2010-2014 Sam Soffes. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <Security/Security.h>
+
+#if __IPHONE_7_0 || __MAC_10_9
+// Keychain synchronization available at compile time
+#define FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE 1
+#endif
+
+#if __IPHONE_3_0 || __MAC_10_9
+// Keychain access group available at compile time
+#define FLEXKEYCHAIN_ACCESS_GROUP_AVAILABLE 1
+#endif
+
+#ifdef FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE
+typedef NS_ENUM(NSUInteger, FLEXKeychainQuerySynchronizationMode) {
+    FLEXKeychainQuerySynchronizationModeAny,
+    FLEXKeychainQuerySynchronizationModeNo,
+    FLEXKeychainQuerySynchronizationModeYes
+};
+#endif
+
+/// Simple interface for querying or modifying keychain items.
+@interface FLEXKeychainQuery : NSObject
+
+/// kSecAttrAccount
+@property (nonatomic, copy) NSString *account;
+
+/// kSecAttrService
+@property (nonatomic, copy) NSString *service;
+
+/// kSecAttrLabel
+@property (nonatomic, copy) NSString *label;
+
+#ifdef FLEXKEYCHAIN_ACCESS_GROUP_AVAILABLE
+/// kSecAttrAccessGroup (only used on iOS)
+@property (nonatomic, copy) NSString *accessGroup;
+#endif
+
+#ifdef FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE
+/// kSecAttrSynchronizable
+@property (nonatomic) FLEXKeychainQuerySynchronizationMode synchronizationMode;
+#endif
+
+/// Root storage for password information
+@property (nonatomic, copy) NSData *passwordData;
+
+/// This property automatically transitions between an object and the value of
+/// `passwordData` using NSKeyedArchiver and NSKeyedUnarchiver.
+@property (nonatomic, copy) id<NSCoding> passwordObject;
+
+/// Convenience accessor for setting and getting a password string. Passes through
+/// to `passwordData` using UTF-8 string encoding.
+@property (nonatomic, copy) NSString *password;
+
+
+#pragma mark Saving & Deleting
+
+/// Save the receiver's attributes as a keychain item. Existing items with the
+/// given account, service, and access group will first be deleted.
+///
+/// @param error Populated should an error occur.
+/// @return `YES` if saving was successful, `NO` otherwise.
+- (BOOL)save:(NSError **)error;
+
+/// Delete keychain items that match the given account, service, and access group.
+///
+/// @param error Populated should an error occur.
+/// @return `YES` if saving was successful, `NO` otherwise.
+- (BOOL)deleteItem:(NSError **)error;
+
+
+#pragma mark Fetching
+
+/// Fetch all keychain items that match the given account, service, and access
+/// group. The values of `password` and `passwordData` are ignored when fetching.
+///
+/// @param error Populated should an error occur.
+/// @return An array of dictionaries that represent all matching keychain items,
+/// or `nil` should an error occur. The order of the items is not determined.
+- (NSArray<NSDictionary<NSString *, id> *> *)fetchAll:(NSError **)error;
+
+/// Fetch the keychain item that matches the given account, service, and access
+/// group. The `password` and `passwordData` properties will be populated unless
+/// an error occurs. The values of `password` and `passwordData` are ignored when
+/// fetching.
+///
+/// @param error Populated should an error occur.
+/// @return `YES` if fetching was successful, `NO` otherwise.
+- (BOOL)fetch:(NSError **)error;
+
+
+#pragma mark Synchronization Status
+
+#ifdef FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE
+/// Returns a boolean indicating if keychain synchronization is available on the device at runtime.
+/// The #define FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE is only for compile time.
+/// If you are checking for the presence of synchronization, you should use this method.
+///
+/// @return A value indicating if keychain synchronization is available
++ (BOOL)isSynchronizationAvailable;
+#endif
+
+@end

Classes/GlobalStateExplorers/Keychain/FLEXKeychainQuery.m

@@ -0,0 +1,304 @@
+//
+//  FLEXKeychainQuery.m
+//  FLEXKeychain
+//
+//  Created by Caleb Davenport on 3/19/13.
+//  Copyright (c) 2013-2014 Sam Soffes. All rights reserved.
+//
+
+#import "FLEXKeychainQuery.h"
+#import "FLEXKeychain.h"
+
+@implementation FLEXKeychainQuery
+
+#pragma mark - Public
+
+- (BOOL)save:(NSError *__autoreleasing *)error {
+    OSStatus status = FLEXKeychainErrorBadArguments;
+    if (!self.service || !self.account || !self.passwordData) {
+        if (error) {
+            *error = [self errorWithCode:status];
+        }
+        return NO;
+    }
+    
+    NSMutableDictionary *query = nil;
+    NSMutableDictionary * searchQuery = [self query];
+    status = SecItemCopyMatching((__bridge CFDictionaryRef)searchQuery, nil);
+    if (status == errSecSuccess) {//item already exists, update it!
+        query = [[NSMutableDictionary alloc]init];
+        query[(__bridge id)kSecValueData] = self.passwordData;
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+        CFTypeRef accessibilityType = [FLEXKeychain accessibilityType];
+        if (accessibilityType) {
+            query[(__bridge id)kSecAttrAccessible] = (__bridge id)accessibilityType;
+        }
+#endif
+        status = SecItemUpdate((__bridge CFDictionaryRef)(searchQuery), (__bridge CFDictionaryRef)(query));
+    }else if (status == errSecItemNotFound){//item not found, create it!
+        query = [self query];
+        if (self.label) {
+            query[(__bridge id)kSecAttrLabel] = self.label;
+        }
+        query[(__bridge id)kSecValueData] = self.passwordData;
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+        CFTypeRef accessibilityType = [FLEXKeychain accessibilityType];
+        if (accessibilityType) {
+            query[(__bridge id)kSecAttrAccessible] = (__bridge id)accessibilityType;
+        }
+#endif
+        status = SecItemAdd((__bridge CFDictionaryRef)query, NULL);
+    }
+    
+    if (status != errSecSuccess && error != NULL) {
+        *error = [self errorWithCode:status];
+    }
+    
+    return (status == errSecSuccess);
+}
+
+
+- (BOOL)deleteItem:(NSError *__autoreleasing *)error {
+    OSStatus status = FLEXKeychainErrorBadArguments;
+    if (!self.service || !self.account) {
+        if (error) {
+            *error = [self errorWithCode:status];
+        }
+        
+        return NO;
+    }
+    
+    NSMutableDictionary *query = [self query];
+#if TARGET_OS_IPHONE
+    status = SecItemDelete((__bridge CFDictionaryRef)query);
+#else
+    // On Mac OS, SecItemDelete will not delete a key created in a different
+    // app, nor in a different version of the same app.
+    //
+    // To replicate the issue, save a password, change to the code and
+    // rebuild the app, and then attempt to delete that password.
+    //
+    // This was true in OS X 10.6 and probably later versions as well.
+    //
+    // Work around it by using SecItemCopyMatching and SecKeychainItemDelete.
+    CFTypeRef result = NULL;
+    query[(__bridge id)kSecReturnRef] = @YES;
+    status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &result);
+    if (status == errSecSuccess) {
+        status = SecKeychainItemDelete((SecKeychainItemRef)result);
+        CFRelease(result);
+    }
+#endif
+    
+    if (status != errSecSuccess && error != NULL) {
+        *error = [self errorWithCode:status];
+    }
+    
+    return (status == errSecSuccess);
+}
+
+
+- (NSArray *)fetchAll:(NSError *__autoreleasing *)error {
+    NSMutableDictionary *query = [self query];
+    query[(__bridge id)kSecReturnAttributes] = @YES;
+    query[(__bridge id)kSecMatchLimit] = (__bridge id)kSecMatchLimitAll;
+#if __IPHONE_4_0 && TARGET_OS_IPHONE
+    CFTypeRef accessibilityType = [FLEXKeychain accessibilityType];
+    if (accessibilityType) {
+        query[(__bridge id)kSecAttrAccessible] = (__bridge id)accessibilityType;
+    }
+#endif
+    
+    CFTypeRef result = NULL;
+    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &result);
+    if (status != errSecSuccess && error != NULL) {
+        *error = [self errorWithCode:status];
+        return nil;
+    }
+    
+    return (__bridge_transfer NSArray *)result;
+}
+
+
+- (BOOL)fetch:(NSError *__autoreleasing *)error {
+    OSStatus status = FLEXKeychainErrorBadArguments;
+    if (!self.service || !self.account) {
+        if (error) {
+            *error = [self errorWithCode:status];
+        }
+        return NO;
+    }
+    
+    CFTypeRef result = NULL;
+    NSMutableDictionary *query = [self query];
+    query[(__bridge id)kSecReturnData] = @YES;
+    query[(__bridge id)kSecMatchLimit] = (__bridge id)kSecMatchLimitOne;
+    status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &result);
+    
+    if (status != errSecSuccess) {
+        if (error) {
+            *error = [self errorWithCode:status];
+        }
+        return NO;
+    }
+    
+    self.passwordData = (__bridge_transfer NSData *)result;
+    return YES;
+}
+
+
+#pragma mark - Accessors
+
+- (void)setPasswordObject:(id<NSCoding>)object {
+    self.passwordData = [NSKeyedArchiver archivedDataWithRootObject:object];
+}
+
+
+- (id<NSCoding>)passwordObject {
+    if (self.passwordData.length) {
+        return [NSKeyedUnarchiver unarchiveObjectWithData:self.passwordData];
+    }
+    
+    return nil;
+}
+
+
+- (void)setPassword:(NSString *)password {
+    self.passwordData = [password dataUsingEncoding:NSUTF8StringEncoding];
+}
+
+
+- (NSString *)password {
+    if (self.passwordData.length) {
+        return [NSString stringWithCString:self.passwordData.bytes encoding:NSUTF8StringEncoding];
+    }
+    
+    return nil;
+}
+
+
+#pragma mark - Synchronization Status
+
+#ifdef FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE
++ (BOOL)isSynchronizationAvailable {
+#if TARGET_OS_IPHONE
+    return YES;
+#else
+    return floor(NSFoundationVersionNumber) > NSFoundationVersionNumber10_8_4;
+#endif
+}
+#endif
+
+
+#pragma mark - Private
+
+- (NSMutableDictionary *)query {
+    NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
+    dictionary[(__bridge id)kSecClass] = (__bridge id)kSecClassGenericPassword;
+    
+    if (self.service) {
+        dictionary[(__bridge id)kSecAttrService] = self.service;
+    }
+    
+    if (self.account) {
+        dictionary[(__bridge id)kSecAttrAccount] = self.account;
+    }
+    
+#ifdef FLEXKEYCHAIN_ACCESS_GROUP_AVAILABLE
+#if !TARGET_IPHONE_SIMULATOR
+    if (self.accessGroup) {
+        dictionary[(__bridge id)kSecAttrAccessGroup] = self.accessGroup;
+    }
+#endif
+#endif
+    
+#ifdef FLEXKEYCHAIN_SYNCHRONIZATION_AVAILABLE
+    if ([[self class] isSynchronizationAvailable]) {
+        id value;
+        
+        switch (self.synchronizationMode) {
+            case FLEXKeychainQuerySynchronizationModeNo: {
+                value = @NO;
+                break;
+            }
+            case FLEXKeychainQuerySynchronizationModeYes: {
+                value = @YES;
+                break;
+            }
+            case FLEXKeychainQuerySynchronizationModeAny: {
+                value = (__bridge id)(kSecAttrSynchronizableAny);
+                break;
+            }
+        }
+        
+        dictionary[(__bridge id)(kSecAttrSynchronizable)] = value;
+    }
+#endif
+    
+    return dictionary;
+}
+
+- (NSError *)errorWithCode:(OSStatus)code {
+    static dispatch_once_t onceToken;
+    static NSBundle *resourcesBundle = nil;
+    dispatch_once(&onceToken, ^{
+        NSURL *url = [[NSBundle bundleForClass:[self class]] URLForResource:@"FLEXKeychain" withExtension:@"bundle"];
+        resourcesBundle = [NSBundle bundleWithURL:url];
+    });
+    
+    NSString *message = nil;
+    switch (code) {
+        case errSecSuccess: return nil;
+        case FLEXKeychainErrorBadArguments: message = NSLocalizedStringFromTableInBundle(@"FLEXKeychainErrorBadArguments", @"FLEXKeychain", resourcesBundle, nil); break;
+            
+#if TARGET_OS_IPHONE
+        case errSecUnimplemented: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecUnimplemented", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecParam: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecParam", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecAllocate: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecAllocate", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecNotAvailable: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecNotAvailable", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecDuplicateItem: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecDuplicateItem", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecItemNotFound: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecItemNotFound", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecInteractionNotAllowed: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecInteractionNotAllowed", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecDecode: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecDecode", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        case errSecAuthFailed: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecAuthFailed", @"FLEXKeychain", resourcesBundle, nil);
+            break;
+        }
+        default: {
+            message = NSLocalizedStringFromTableInBundle(@"errSecDefault", @"FLEXKeychain", resourcesBundle, nil);
+        }
+#else
+        default:
+            message = (__bridge_transfer NSString *)SecCopyErrorMessageString(code, NULL);
+#endif
+    }
+    
+    NSDictionary *userInfo = message ? @{ NSLocalizedDescriptionKey : message } : nil;
+    return [NSError errorWithDomain:kFLEXKeychainErrorDomain code:code userInfo:userInfo];
+}
+
+@end

Classes/GlobalStateExplorers/Keychain/FLEXKeychainTableViewController.h

@@ -0,0 +1,14 @@
+//
+//  FLEXKeychainTableViewController.h
+//  FLEX
+//
+//  Created by ray on 2019/8/17.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXGlobalsEntry.h"
+#import "FLEXTableViewController.h"
+
+@interface FLEXKeychainTableViewController : FLEXTableViewController <FLEXGlobalsEntry>
+
+@end

Classes/GlobalStateExplorers/Keychain/FLEXKeychainTableViewController.m

@@ -0,0 +1,213 @@
+//
+//  FLEXKeychainTableViewController.m
+//  FLEX
+//
+//  Created by ray on 2019/8/17.
+//  Copyright © 2019 Flipboard. All rights reserved.
+//
+
+#import "FLEXKeychain.h"
+#import "FLEXKeychainQuery.h"
+#import "FLEXKeychainTableViewController.h"
+#import "FLEXUtility.h"
+#import "UIPasteboard+FLEX.h"
+
+@interface FLEXKeychainTableViewController ()
+
+@property (nonatomic) NSMutableArray<NSDictionary *> *keychainItems;
+@property (nonatomic) NSString *headerTitle;
+
+@end
+
+@implementation FLEXKeychainTableViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    
+    self.navigationItem.rightBarButtonItems = @[
+        [[UIBarButtonItem alloc]
+            initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:@selector(trashPressed)
+        ],
+        [[UIBarButtonItem alloc]
+            initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addPressed)
+        ],
+    ];
+
+    [self refreshkeychainItems];
+    [self updateHeaderTitle];
+}
+
+- (void)refreshkeychainItems
+{
+    self.keychainItems = [FLEXKeychain allAccounts].mutableCopy;
+}
+
+- (void)updateHeaderTitle
+{
+    self.headerTitle = [NSString stringWithFormat:@"%@ items", @(self.keychainItems.count)];
+}
+
+- (FLEXKeychainQuery *)queryForItemAtIndex:(NSInteger)idx
+{
+    NSDictionary *item = self.keychainItems[idx];
+
+    FLEXKeychainQuery *query = [FLEXKeychainQuery new];
+    query.service = item[kFLEXKeychainWhereKey];
+    query.account = item[kFLEXKeychainAccountKey];
+    [query fetch:nil];
+
+    return query;
+}
+
+- (void)deleteItem:(NSDictionary *)item
+{
+    NSError *error = nil;
+    BOOL success = [FLEXKeychain
+        deletePasswordForService:item[kFLEXKeychainWhereKey]
+        account:item[kFLEXKeychainAccountKey]
+        error:&error
+    ];
+
+    if (!success) {
+        [FLEXAlert makeAlert:^(FLEXAlert *make) {
+            make.title(@"Error Deleting Item");
+            make.message(error.localizedDescription);
+        } showFrom:self];
+    }
+}
+
+
+#pragma mark Buttons
+
+- (void)trashPressed
+{
+    [FLEXAlert makeSheet:^(FLEXAlert *make) {
+        make.title(@"Clear Keychain");
+        make.message(@"This will remove all keychain items for this app.\n");
+        make.message(@"This action cannot be undone. Are you sure?");
+        make.button(@"Yes, clear the keychain").destructiveStyle().handler(^(NSArray *strings) {
+            for (id account in self.keychainItems) {
+                [self deleteItem:account];
+            }
+
+            [self refreshkeychainItems];
+            [self.tableView reloadData];
+        });
+        make.button(@"Cancel").cancelStyle();
+    } showFrom:self];
+}
+
+- (void)addPressed
+{
+    [FLEXAlert makeAlert:^(FLEXAlert *make) {
+        make.title(@"Add Keychain Item");
+        make.textField(@"Service name, i.e. Instagram");
+        make.textField(@"Account, i.e. username@example.com");
+        make.textField(@"Password");
+        make.button(@"Cancel").cancelStyle();
+        make.button(@"Save").handler(^(NSArray<NSString *> *strings) {
+            // Display errors
+            NSError *error = nil;
+            if (![FLEXKeychain setPassword:strings[2] forService:strings[0] account:strings[1] error:&error]) {
+                [FLEXAlert showAlert:@"Error" message:error.localizedDescription from:self];
+            }
+
+            [self refreshkeychainItems];
+            [self.tableView reloadData];
+        });
+    } showFrom:self];
+}
+
+
+#pragma mark - FLEXGlobalsEntry
+
++ (NSString *)globalsEntryTitle:(FLEXGlobalsRow)row
+{
+    return @"🔑  Keychain";
+}
+
++ (UIViewController *)globalsEntryViewController:(FLEXGlobalsRow)row {
+    FLEXKeychainTableViewController *viewController = [self new];
+    viewController.title = [self globalsEntryTitle:row];
+
+    return viewController;
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.keychainItems.count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    static NSString *CellIdentifier = @"Cell";
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+    if (!cell) {
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+    }
+    
+    NSDictionary *item = self.keychainItems[indexPath.row];
+    id account = item[kFLEXKeychainAccountKey];
+    if ([account isKindOfClass:[NSString class]]) {
+        cell.textLabel.text = account;
+    } else {
+        cell.textLabel.text = [NSString stringWithFormat:
+            @"[%@]\n\n%@",
+            NSStringFromClass([account class]),
+            [account description]
+        ];
+    }
+    
+    return cell;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return self.headerTitle;
+}
+
+- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)style forRowAtIndexPath:(NSIndexPath *)ip
+{
+    if (style == UITableViewCellEditingStyleDelete) {
+        [self deleteItem:self.keychainItems[ip.row]];
+        [self.keychainItems removeObjectAtIndex:ip.row];
+        [tv deleteRowsAtIndexPaths:@[ip] withRowAnimation:UITableViewRowAnimationAutomatic];
+    }
+}
+
+
+#pragma mark - Table View Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXKeychainQuery *query = [self queryForItemAtIndex:indexPath.row];
+    
+    [FLEXAlert makeAlert:^(FLEXAlert *make) {
+        make.title(query.service);
+        make.message(@"Service: ").message(query.service);
+        make.message(@"\nAccount: ").message(query.account);
+        make.message(@"\nPassword: ").message(query.password);
+
+        make.button(@"Copy Service").handler(^(NSArray<NSString *> *strings) {
+            [UIPasteboard.generalPasteboard flex_copy:query.service];
+        });
+        make.button(@"Copy Account").handler(^(NSArray<NSString *> *strings) {
+            [UIPasteboard.generalPasteboard flex_copy:query.account];
+        });
+        make.button(@"Copy Password").handler(^(NSArray<NSString *> *strings) {
+            [UIPasteboard.generalPasteboard flex_copy:query.password];
+        });
+        make.button(@"Dismiss").cancelStyle();
+        
+    } showFrom:self];
+
+    [tableView deselectRowAtIndexPath:indexPath animated:YES];
+}
+
+@end

Classes/GlobalStateExplorers/Keychain/SSKeychain_LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2010-2012 Sam Soffes.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Classes/GlobalStateExplorers/SystemLog/ActivityStreamAPI.h

@@ -0,0 +1,207 @@
+//
+// Taken from https://github.com/llvm-mirror/lldb/blob/master/tools/debugserver/source/MacOSX/DarwinLog/ActivityStreamSPI.h
+// by Tanner Bennett on 03/03/2019 with minimal modifications.
+//
+
+//===-- ActivityStreamAPI.h -------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ActivityStreamSPI_h
+#define ActivityStreamSPI_h
+
+#include <sys/time.h>
+// #include <xpc/xpc.h>
+
+/* By default, XPC objects are declared as Objective-C types when building with
+ * an Objective-C compiler. This allows them to participate in ARC, in RR
+ * management by the Blocks runtime and in leaks checking by the static
+ * analyzer, and enables them to be added to Cocoa collections.
+ *
+ * See <os/object.h> for details.
+ */
+#if !TARGET_OS_MACCATALYST
+#if OS_OBJECT_USE_OBJC
+OS_OBJECT_DECL(xpc_object);
+#else
+typedef void * xpc_object_t;
+#endif
+#endif
+
+#define OS_ACTIVITY_MAX_CALLSTACK 32
+
+// Enums
+
+typedef NS_ENUM(uint32_t, os_activity_stream_flag_t) {
+    OS_ACTIVITY_STREAM_PROCESS_ONLY = 0x00000001,
+    OS_ACTIVITY_STREAM_SKIP_DECODE = 0x00000002,
+    OS_ACTIVITY_STREAM_PAYLOAD = 0x00000004,
+    OS_ACTIVITY_STREAM_HISTORICAL = 0x00000008,
+    OS_ACTIVITY_STREAM_CALLSTACK = 0x00000010,
+    OS_ACTIVITY_STREAM_DEBUG = 0x00000020,
+    OS_ACTIVITY_STREAM_BUFFERED = 0x00000040,
+    OS_ACTIVITY_STREAM_NO_SENSITIVE = 0x00000080,
+    OS_ACTIVITY_STREAM_INFO = 0x00000100,
+    OS_ACTIVITY_STREAM_PROMISCUOUS = 0x00000200,
+    OS_ACTIVITY_STREAM_PRECISE_TIMESTAMPS = 0x00000200
+};
+
+typedef NS_ENUM(uint32_t, os_activity_stream_type_t) {
+    OS_ACTIVITY_STREAM_TYPE_ACTIVITY_CREATE = 0x0201,
+    OS_ACTIVITY_STREAM_TYPE_ACTIVITY_TRANSITION = 0x0202,
+    OS_ACTIVITY_STREAM_TYPE_ACTIVITY_USERACTION = 0x0203,
+    
+    OS_ACTIVITY_STREAM_TYPE_TRACE_MESSAGE = 0x0300,
+    
+    OS_ACTIVITY_STREAM_TYPE_LOG_MESSAGE = 0x0400,
+    OS_ACTIVITY_STREAM_TYPE_LEGACY_LOG_MESSAGE = 0x0480,
+    
+    OS_ACTIVITY_STREAM_TYPE_SIGNPOST_BEGIN = 0x0601,
+    OS_ACTIVITY_STREAM_TYPE_SIGNPOST_END = 0x0602,
+    OS_ACTIVITY_STREAM_TYPE_SIGNPOST_EVENT = 0x0603,
+    
+    OS_ACTIVITY_STREAM_TYPE_STATEDUMP_EVENT = 0x0A00,
+};
+
+typedef NS_ENUM(uint32_t, os_activity_stream_event_t) {
+    OS_ACTIVITY_STREAM_EVENT_STARTED = 1,
+    OS_ACTIVITY_STREAM_EVENT_STOPPED = 2,
+    OS_ACTIVITY_STREAM_EVENT_FAILED = 3,
+    OS_ACTIVITY_STREAM_EVENT_CHUNK_STARTED = 4,
+    OS_ACTIVITY_STREAM_EVENT_CHUNK_FINISHED = 5,
+};
+
+// Types
+
+typedef uint64_t os_activity_id_t;
+typedef struct os_activity_stream_s *os_activity_stream_t;
+typedef struct os_activity_stream_entry_s *os_activity_stream_entry_t;
+
+#define OS_ACTIVITY_STREAM_COMMON()                                            \
+uint64_t trace_id;                                                           \
+uint64_t timestamp;                                                          \
+uint64_t thread;                                                             \
+const uint8_t *image_uuid;                                                   \
+const char *image_path;                                                      \
+struct timeval tv_gmt;                                                       \
+struct timezone tz;                                                          \
+uint32_t offset
+
+typedef struct os_activity_stream_common_s {
+    OS_ACTIVITY_STREAM_COMMON();
+} * os_activity_stream_common_t;
+
+struct os_activity_create_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    const char *name;
+    os_activity_id_t creator_aid;
+    uint64_t unique_pid;
+};
+
+struct os_activity_transition_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    os_activity_id_t transition_id;
+};
+
+typedef struct os_log_message_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    const char *format;
+    const uint8_t *buffer;
+    size_t buffer_sz;
+    const uint8_t *privdata;
+    size_t privdata_sz;
+    const char *subsystem;
+    const char *category;
+    uint32_t oversize_id;
+    uint8_t ttl;
+    bool persisted;
+} * os_log_message_t;
+
+typedef struct os_trace_message_v2_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    const char *format;
+    const void *buffer;
+    size_t bufferLen;
+    xpc_object_t __unsafe_unretained payload;
+} * os_trace_message_v2_t;
+
+typedef struct os_activity_useraction_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    const char *action;
+    bool persisted;
+} * os_activity_useraction_t;
+
+typedef struct os_signpost_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    const char *format;
+    const uint8_t *buffer;
+    size_t buffer_sz;
+    const uint8_t *privdata;
+    size_t privdata_sz;
+    const char *subsystem;
+    const char *category;
+    uint64_t duration_nsec;
+    uint32_t callstack_depth;
+    uint64_t callstack[OS_ACTIVITY_MAX_CALLSTACK];
+} * os_signpost_t;
+
+typedef struct os_activity_statedump_s {
+    OS_ACTIVITY_STREAM_COMMON();
+    char *message;
+    size_t message_size;
+    char image_path_buffer[PATH_MAX];
+} * os_activity_statedump_t;
+
+struct os_activity_stream_entry_s {
+    os_activity_stream_type_t type;
+    
+    // information about the process streaming the data
+    pid_t pid;
+    uint64_t proc_id;
+    const uint8_t *proc_imageuuid;
+    const char *proc_imagepath;
+    
+    // the activity associated with this streamed event
+    os_activity_id_t activity_id;
+    os_activity_id_t parent_id;
+    
+    union {
+        struct os_activity_stream_common_s common;
+        struct os_activity_create_s activity_create;
+        struct os_activity_transition_s activity_transition;
+        struct os_log_message_s log_message;
+        struct os_trace_message_v2_s trace_message;
+        struct os_activity_useraction_s useraction;
+        struct os_signpost_s signpost;
+        struct os_activity_statedump_s statedump;
+    };
+};
+
+// Blocks
+
+typedef bool (^os_activity_stream_block_t)(os_activity_stream_entry_t entry,
+                                           int error);
+
+typedef void (^os_activity_stream_event_block_t)(
+                                                 os_activity_stream_t stream, os_activity_stream_event_t event);
+
+// SPI entry point prototypes
+
+typedef os_activity_stream_t (*os_activity_stream_for_pid_t)(
+                                                             pid_t pid, os_activity_stream_flag_t flags,
+                                                             os_activity_stream_block_t stream_block);
+
+typedef void (*os_activity_stream_resume_t)(os_activity_stream_t stream);
+
+typedef void (*os_activity_stream_cancel_t)(os_activity_stream_t stream);
+
+typedef char *(*os_log_copy_formatted_message_t)(os_log_message_t log_message);
+
+typedef void (*os_activity_stream_set_event_handler_t)(
+                                                       os_activity_stream_t stream, os_activity_stream_event_block_t block);
+
+#endif /* ActivityStreamSPI_h */