Fix #168 by restructuring try-catch branching

#178 made methods with no arguments appear to take one argument by forcibly returning the selector name as the only argument. This is not desired behavior. Updating the test to reflect desired behavior reveals this.

This commit makes this method return an empty array when selectors consist of one component, and does some housekeeping on the tests added in #178.

.clang-format

@@ -0,0 +1,47 @@
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+BreakConstructorInitializersBeforeComma: false
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+Cpp11BracedListStyle: true
+DerivePointerBinding: false
+ExperimentalAutoDetectBinPacking: false
+IndentCaseLabels: true
+IndentFunctionDeclarationAfterType: false
+IndentWidth: 4
+MaxEmptyLinesToKeep: 3
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+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+Standard: Auto
+TabWidth: 4
+UseTab: Never
+
+...

.travis.yml

@@ -0,0 +1,12 @@
+language: objective-c
+xcode_workspace: FLEX.xcworkspace
+xcode_sdk: iphonesimulator
+before_install:
+    - gem install xcpretty
+matrix:
+    include:
+        - xcode_scheme: UICatalog
+        - xcode_scheme: FLEX
+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/Editing/ArgumentInputViews/FLEXArgumentInputColorView.m

@@ -69,7 +69,7 @@
     
     [self.valueLabel sizeToFit];
     CGFloat valueLabelOriginX = CGRectGetMaxX(self.slider.frame);
-    CGFloat valueLabelOriginY = floor((self.slider.frame.size.height - self.valueLabel.frame.size.height) / 2.0);
+    CGFloat valueLabelOriginY = FLEXFloor((self.slider.frame.size.height - self.valueLabel.frame.size.height) / 2.0);
     self.valueLabel.frame = CGRectMake(valueLabelOriginX, valueLabelOriginY, kValueLabelWidth, self.valueLabel.frame.size.height);
 }
 
@@ -228,7 +228,7 @@
     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.h

@@ -0,0 +1,13 @@
+//
+//  FLEXArgumentInputDataView.h
+//  Flipboard
+//
+//  Created by Daniel Rodriguez Troitino on 2/14/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import "FLEXArgumentInputView.h"
+
+@interface FLEXArgumentInputDateView : FLEXArgumentInputView
+
+@end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputDateView.m

@@ -0,0 +1,63 @@
+//
+//  FLEXArgumentInputDataView.m
+//  Flipboard
+//
+//  Created by Daniel Rodriguez Troitino on 2/14/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import "FLEXArgumentInputDateView.h"
+#import "FLEXRuntimeUtility.h"
+
+@interface FLEXArgumentInputDateView ()
+
+@property (nonatomic, strong) UIDatePicker *datePicker;
+
+@end
+
+@implementation FLEXArgumentInputDateView
+
+- (instancetype)initWithArgumentTypeEncoding:(const char *)typeEncoding
+{
+    self = [super initWithArgumentTypeEncoding:typeEncoding];
+    if (self) {
+        self.datePicker = [[UIDatePicker alloc] init];
+        self.datePicker.datePickerMode = UIDatePickerModeDateAndTime;
+        // Using UTC, because that's what the NSDate description prints
+        self.datePicker.calendar = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
+        self.datePicker.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"UTC"];
+        [self addSubview:self.datePicker];
+    }
+    return self;
+}
+
+- (void)setInputValue:(id)inputValue
+{
+    if ([inputValue isKindOfClass:[NSDate class]]) {
+        self.datePicker.date = inputValue;
+    }
+}
+
+- (id)inputValue
+{
+    return self.datePicker.date;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    self.datePicker.frame = self.bounds;
+}
+
+- (CGSize)sizeThatFits:(CGSize)size
+{
+    CGFloat height = [self.datePicker sizeThatFits:size].height;
+    return CGSizeMake(size.width, height);
+}
+
++ (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value
+{
+    return (type && (strcmp(type, FLEXEncodeClass(NSDate)) == 0)) || [value isKindOfClass:[NSDate class]];
+}
+
+@end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontsPickerView.m

@@ -11,7 +11,7 @@
 
 @interface FLEXArgumentInputFontsPickerView ()
 
-@property (nonatomic, strong) NSMutableArray *availableFonts;
+@property (nonatomic, strong) NSMutableArray<NSString *> *availableFonts;
 
 @end
 
@@ -35,7 +35,7 @@
     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
@@ -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];
@@ -90,7 +90,7 @@
         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/FLEXArgumentInputNumberView.m

@@ -35,7 +35,7 @@
 
 + (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)),

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStructView.m

@@ -12,7 +12,7 @@
 
 @interface FLEXArgumentInputStructView ()
 
-@property (nonatomic, strong) NSArray *argumentInputViews;
+@property (nonatomic, strong) NSArray<FLEXArgumentInputView *> *argumentInputViews;
 
 @end
 
@@ -22,8 +22,8 @@
 {
     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];
@@ -31,7 +31,7 @@
             inputView.targetSize = FLEXArgumentInputViewSizeSmall;
             
             if (fieldIndex < [customTitles count]) {
-                inputView.title = [customTitles objectAtIndex:fieldIndex];
+                inputView.title = customTitles[fieldIndex];
             } else {
                 inputView.title = [NSString stringWithFormat:@"%@ field %lu (%@)", structName, (unsigned long)fieldIndex, prettyTypeEncoding];
             }
@@ -72,7 +72,7 @@
                 [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]) {
                         inputView.inputValue = (__bridge id)fieldPointer;
@@ -102,7 +102,7 @@
         [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]) {
                 // Object fields
@@ -179,9 +179,9 @@
     return type && type[0] == '{';
 }
 
-+ (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) {

Classes/Editing/ArgumentInputViews/FLEXArgumentInputView.m

@@ -22,7 +22,7 @@
 {
     self = [super initWithFrame:CGRectZero];
     if (self) {
-        self.typeEncoding = @(typeEncoding);
+        self.typeEncoding = typeEncoding != NULL ? @(typeEncoding) : nil;
     }
     return self;
 }

Classes/Editing/ArgumentInputViews/FLEXArgumentInputViewFactory.h

@@ -12,9 +12,12 @@
 
 @interface FLEXArgumentInputViewFactory : NSObject
 
-/// The main factory method for making argument input view subclasses that are the best fit for the type.
+/// Forwards to argumentInputViewForTypeEncoding:currentValue: with a nil currentValue.
 + (FLEXArgumentInputView *)argumentInputViewForTypeEncoding:(const char *)typeEncoding;
 
+/// The main factory method for making argument input view subclasses that are the best fit for the type.
++ (FLEXArgumentInputView *)argumentInputViewForTypeEncoding:(const char *)typeEncoding currentValue:(id)currentValue;
+
 /// A way to check if we should try editing a filed given its type encoding and value.
 /// Useful when deciding whether to edit or explore a property, ivar, or NSUserDefaults value.
 + (BOOL)canEditFieldWithTypeEncoding:(const char *)typeEncoding currentValue:(id)currentValue;

Classes/Editing/ArgumentInputViews/FLEXArgumentInputViewFactory.m

@@ -16,12 +16,18 @@
 #import "FLEXArgumentInputStringView.h"
 #import "FLEXArgumentInputFontView.h"
 #import "FLEXArgumentInputColorView.h"
+#import "FLEXArgumentInputDateView.h"
 
 @implementation FLEXArgumentInputViewFactory
 
 + (FLEXArgumentInputView *)argumentInputViewForTypeEncoding:(const char *)typeEncoding
 {
-    Class subclass = [self argumentInputViewSubclassForTypeEncoding:typeEncoding currentValue:nil];
+    return [self argumentInputViewForTypeEncoding:typeEncoding currentValue:nil];
+}
+
++ (FLEXArgumentInputView *)argumentInputViewForTypeEncoding:(const char *)typeEncoding currentValue:(id)currentValue
+{
+    Class subclass = [self argumentInputViewSubclassForTypeEncoding:typeEncoding currentValue:currentValue];
     if (!subclass) {
         // Fall back to a FLEXArgumentInputNotSupportedView if we can't find a subclass that fits the type encoding.
         // The unsupported view shows "nil" and does not allow user input.
@@ -47,6 +53,8 @@
         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]) {

Classes/Editing/FLEXDefaultEditorViewController.m

@@ -41,10 +41,11 @@
     [super viewDidLoad];
     
     self.fieldEditorView.fieldDescription = self.key;
-    
-    FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:@encode(id)];
+
+    id currentValue = [self.defaults objectForKey:self.key];
+    FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:@encode(id) currentValue:currentValue];
     inputView.backgroundColor = self.view.backgroundColor;
-    inputView.inputValue = [self.defaults objectForKey:self.key];
+    inputView.inputValue = currentValue;
     self.fieldEditorView.argumentInputViews = @[inputView];
 }
 

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, strong) NSArray<FLEXArgumentInputView *> *argumentInputViews;
 
 @end

Classes/Editing/FLEXFieldEditorView.m

@@ -103,7 +103,7 @@
     }
 }
 
-- (void)setArgumentInputViews:(NSArray *)argumentInputViews
+- (void)setArgumentInputViews:(NSArray<FLEXArgumentInputView *> *)argumentInputViews
 {
     if (![_argumentInputViews isEqual:argumentInputViews]) {
         

Classes/Editing/FLEXMethodCallingViewController.m

@@ -17,6 +17,7 @@
 @interface FLEXMethodCallingViewController ()
 
 @property (nonatomic, assign) Method method;
+@property (nonatomic, assign) FLEXTypeEncoding *returnType;
 
 @end
 
@@ -27,7 +28,8 @@
     self = [super initWithTarget:target];
     if (self) {
         self.method = method;
-        self.title = [self isClassMethod] ? @"Class Method" : @"Method";
+        self.returnType = [FLEXRuntimeUtility returnTypeForMethod:method];
+        self.title = [self isClassMethod] ? @"Class Method" : @"Method";;
     }
     return self;
 }
@@ -36,10 +38,14 @@
 {
     [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 +60,12 @@
     self.fieldEditorView.argumentInputViews = argumentInputViews;
 }
 
+- (void)dealloc
+{
+    free(self.returnType);
+    self.returnType = NULL;
+}
+
 - (BOOL)isClassMethod
 {
     return self.target && self.target == [self.target class];
@@ -88,6 +100,7 @@
         [alert show];
     } 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 {

Classes/Explorer Toolbar/FLEXExplorerViewController.h

@@ -1,25 +0,0 @@
-//
-//  FLEXExplorerViewController.h
-//  Flipboard
-//
-//  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import <UIKit/UIKit.h>
-
-@protocol FLEXExplorerViewControllerDelegate;
-
-@interface FLEXExplorerViewController : UIViewController
-
-@property (nonatomic, weak) id <FLEXExplorerViewControllerDelegate> delegate;
-
-- (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates;
-
-@end
-
-@protocol FLEXExplorerViewControllerDelegate <NSObject>
-
-- (void)explorerViewControllerDidFinish:(FLEXExplorerViewController *)explorerViewController;
-
-@end

Classes/Explorer Toolbar/FLEXManager.h

@@ -1,31 +0,0 @@
-//
-//  FLEXManager.h
-//  Flipboard
-//
-//  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import <Foundation/Foundation.h>
-
-@interface FLEXManager : NSObject
-
-+ (instancetype)sharedManager;
-
-@property (nonatomic, readonly) BOOL isHidden;
-
-- (void)showExplorer;
-- (void)hideExplorer;
-
-#pragma mark - Extensions
-
-/// 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.
-/// Passing a block that returns an object allows you to display information about an object whose actual pointer may change at runtime (e.g. +currentUser)
-/// @note This method must be called from the main thread.
-/// The objectFutureBlock will be invoked from the main thread and may 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)registerGlobalEntryWithName:(NSString *)entryName objectFutureBlock:(id(^)(void))objectFutureBlock;
-
-@end

Classes/Explorer Toolbar/FLEXManager.m

@@ -1,105 +0,0 @@
-//
-//  FLEXManager.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import "FLEXManager.h"
-#import "FLEXExplorerViewController.h"
-#import "FLEXWindow.h"
-#import "FLEXGlobalsTableViewControllerEntry.h"
-#import "FLEXObjectExplorerFactory.h"
-#import "FLEXObjectExplorerViewController.h"
-
-@interface FLEXManager () <FLEXWindowEventDelegate, FLEXExplorerViewControllerDelegate>
-
-@property (nonatomic, strong) FLEXWindow *explorerWindow;
-@property (nonatomic, strong) FLEXExplorerViewController *explorerViewController;
-
-@property (nonatomic, readonly, strong) NSMutableArray *userGlobalEntries;
-
-@end
-
-@implementation FLEXManager
-
-+ (instancetype)sharedManager
-{
-    static FLEXManager *sharedManager = nil;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{
-        sharedManager = [[[self class] alloc] init];
-    });
-    return sharedManager;
-}
-
-- (instancetype)init
-{
-    self = [super init];
-    if (self) {
-        self.explorerWindow = [[FLEXWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
-        self.explorerWindow.eventDelegate = self;
-        
-        _userGlobalEntries = [[NSMutableArray alloc] init];
-        
-        self.explorerViewController = [[FLEXExplorerViewController alloc] init];
-        self.explorerViewController.delegate = self;
-        self.explorerWindow.rootViewController = self.explorerViewController;
-        [self.explorerWindow addSubview:self.explorerViewController.view];
-    }
-    return self;
-}
-
-- (void)showExplorer
-{
-    self.explorerWindow.hidden = NO;
-}
-
-- (void)hideExplorer
-{
-    self.explorerWindow.hidden = YES;
-}
-
-- (BOOL)isHidden
-{
-    return self.explorerWindow.isHidden;
-}
-
-
-#pragma mark - FLEXWindowEventDelegate
-
-- (BOOL)shouldHandleTouchAtPoint:(CGPoint)pointInWindow
-{
-    // Ask the explorer view controller
-    return [self.explorerViewController shouldReceiveTouchAtWindowPoint:pointInWindow];
-}
-
-
-#pragma mark - FLEXExplorerViewControllerDelegate
-
-- (void)explorerViewControllerDidFinish:(FLEXExplorerViewController *)explorerViewController
-{
-    [self hideExplorer];
-}
-
-
-#pragma mark - Extensions
-
-- (void)registerGlobalEntryWithName:(NSString *)entryName objectFutureBlock:(id (^)(void))objectFutureBlock
-{
-    NSParameterAssert(entryName);
-    NSParameterAssert(objectFutureBlock);
-    NSAssert([NSThread isMainThread], @"This method must be called from the main thread.");
-
-    entryName = entryName.copy;
-    FLEXGlobalsTableViewControllerEntry *entry = [FLEXGlobalsTableViewControllerEntry entryWithNameFuture:^NSString *{
-        return entryName;
-    } viewControllerFuture:^UIViewController *{
-        return [FLEXObjectExplorerFactory explorerViewControllerForObject:objectFutureBlock()];
-    }];
-
-    [self.userGlobalEntries addObject:entry];
-}
-
-@end

Classes/Explorer Toolbar/FLEXWindow.m

@@ -1,36 +0,0 @@
-//
-//  FLEXWindow.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 4/13/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import "FLEXWindow.h"
-
-@implementation FLEXWindow
-
-- (id)initWithFrame:(CGRect)frame
-{
-    self = [super initWithFrame:frame];
-    if (self) {
-        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.
-        // UIWindowLevelStatusBar + 100 seems to hit that balance.
-        self.windowLevel = UIWindowLevelStatusBar + 100.0;
-    }
-    return self;
-}
-
-- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
-{
-    BOOL pointInside = NO;
-    if ([self.eventDelegate shouldHandleTouchAtPoint:point]) {
-        pointInside = [super pointInside:point withEvent:event];
-    }
-    return pointInside;
-}
-
-@end

Classes/ExplorerInterface/FLEXExplorerViewController.h

@@ -0,0 +1,43 @@
+//
+//  FLEXExplorerViewController.h
+//  Flipboard
+//
+//  Created by Ryan Olson on 4/4/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@protocol FLEXExplorerViewControllerDelegate;
+
+@interface FLEXExplorerViewController : UIViewController
+
+@property (nonatomic, weak) id <FLEXExplorerViewControllerDelegate> delegate;
+
+- (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;
+- (void)toggleMoveTool;
+- (void)toggleViewsTool;
+- (void)toggleMenuTool;
+- (void)handleDownArrowKeyPressed;
+- (void)handleUpArrowKeyPressed;
+- (void)handleRightArrowKeyPressed;
+- (void)handleLeftArrowKeyPressed;
+
+@end
+
+@protocol FLEXExplorerViewControllerDelegate <NSObject>
+
+- (void)explorerViewControllerDidFinish:(FLEXExplorerViewController *)explorerViewController;
+
+@end

Classes/ExplorerInterface/FLEXExplorerViewController.m

@@ -14,6 +14,9 @@
 #import "FLEXGlobalsTableViewController.h"
 #import "FLEXObjectExplorerViewController.h"
 #import "FLEXObjectExplorerFactory.h"
+#import "FLEXNetworkHistoryTableViewController.h"
+
+static NSString *const kFLEXToolbarTopMarginDefaultsKey = @"com.flex.FLEXToolbar.topMargin";
 
 typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     FLEXExplorerModeDefault,
@@ -42,10 +45,10 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 /// 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;
+@property (nonatomic, strong) NSDictionary<NSValue *, UIView *> *outlineViewsForVisibleViews;
 
 /// The actual views at the selection point with the deepest view last.
-@property (nonatomic, strong) NSArray *viewsAtTapPoint;
+@property (nonatomic, strong) NSArray<UIView *> *viewsAtTapPoint;
 
 /// The view that we're currently highlighting with an overlay and displaying details for.
 @property (nonatomic, strong) UIView *selectedView;
@@ -65,7 +68,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 @property (nonatomic, assign) UIStatusBarStyle previousStatusBarStyle;
 
 /// All views that we're KVOing. Used to help us clean up properly.
-@property (nonatomic, strong) NSMutableSet *observedViews;
+@property (nonatomic, strong) NSMutableSet<UIView *> *observedViews;
 
 @end
 
@@ -93,10 +96,14 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 	
     // Toolbar
     self.explorerToolbar = [[FLEXExplorerToolbar alloc] init];
-    CGSize toolbarSize = [self.explorerToolbar sizeThatFits:self.view.bounds.size];
+
     // 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];
@@ -120,63 +127,27 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 }
 
 
-#pragma mark - Status Bar Wrangling for iOS 7
-
-// Try to get the preferred status bar properties from the app's root view controller (not us).
-// In general, our window shouldn't be the key window when this view controller is asked about the status bar.
-// However, we guard against infinite recursion and provide a reasonable default for status bar behavior in case our window is the keyWindow.
-
-- (UIViewController *)viewControllerForStatusBarAndOrientationProperties
-{
-    UIViewController *viewControllerToAsk = [[[UIApplication sharedApplication] keyWindow] rootViewController];
-    
-    // On iPhone, modal view controllers get asked
-    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
-        while (viewControllerToAsk.presentedViewController) {
-            viewControllerToAsk = viewControllerToAsk.presentedViewController;
-        }
-    }
-    
-    return viewControllerToAsk;
-}
-
-- (UIStatusBarStyle)preferredStatusBarStyle
-{
-    UIViewController *viewControllerToAsk = [self viewControllerForStatusBarAndOrientationProperties];
-    UIStatusBarStyle preferredStyle = UIStatusBarStyleDefault;
-    if (viewControllerToAsk && viewControllerToAsk != self) {
-        preferredStyle = [viewControllerToAsk preferredStatusBarStyle];
-    }
-    return preferredStyle;
-}
-
-- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation
-{
-    UIViewController *viewControllerToAsk = [self viewControllerForStatusBarAndOrientationProperties];
-    UIStatusBarAnimation preferredAnimation = UIStatusBarAnimationFade;
-    if (viewControllerToAsk && viewControllerToAsk != self) {
-        preferredAnimation = [viewControllerToAsk preferredStatusBarUpdateAnimation];
-    }
-    return preferredAnimation;
-}
-
-- (BOOL)prefersStatusBarHidden
-{
-    UIViewController *viewControllerToAsk = [self viewControllerForStatusBarAndOrientationProperties];
-    BOOL prefersHidden = NO;
-    if (viewControllerToAsk && viewControllerToAsk != self) {
-        prefersHidden = [viewControllerToAsk prefersStatusBarHidden];
-    }
-    return prefersHidden;
-}
-
-
 #pragma mark - Rotation
 
-- (NSUInteger)supportedInterfaceOrientations
+- (UIViewController *)viewControllerForRotationAndOrientation
 {
-    UIViewController *viewControllerToAsk = [self viewControllerForStatusBarAndOrientationProperties];
-    NSUInteger supportedOrientations = [FLEXUtility infoPlistSupportedInterfaceOrientationsMask];
+    UIWindow *window = self.previousKeyWindow ?: [[UIApplication sharedApplication] keyWindow];
+    UIViewController *viewController = window.rootViewController;
+    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
+    }
+    return viewController;
+}
+
+- (UIInterfaceOrientationMask)supportedInterfaceOrientations
+{
+    UIViewController *viewControllerToAsk = [self viewControllerForRotationAndOrientation];
+    UIInterfaceOrientationMask supportedOrientations = [FLEXUtility infoPlistSupportedInterfaceOrientationsMask];
     if (viewControllerToAsk && viewControllerToAsk != self) {
         supportedOrientations = [viewControllerToAsk supportedInterfaceOrientations];
     }
@@ -192,7 +163,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (BOOL)shouldAutorotate
 {
-    UIViewController *viewControllerToAsk = [self viewControllerForStatusBarAndOrientationProperties];
+    UIViewController *viewControllerToAsk = [self viewControllerForRotationAndOrientation];
     BOOL shouldAutorotate = YES;
     if (viewControllerToAsk && viewControllerToAsk != self) {
         shouldAutorotate = [viewControllerToAsk shouldAutorotate];
@@ -200,32 +171,30 @@ 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;
-}
+    [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;
+             }
+         }
 
-- (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;
-        }
-    }
-    
-    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
 
 - (void)setSelectedView:(UIView *)selectedView
@@ -241,7 +210,7 @@ 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) {
@@ -267,7 +236,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
 }
 
-- (void)setViewsAtTapPoint:(NSArray *)viewsAtTapPoint
+- (void)setViewsAtTapPoint:(NSArray<UIView *> *)viewsAtTapPoint
 {
     if (![_viewsAtTapPoint isEqual:viewsAtTapPoint]) {
         for (UIView *view in _viewsAtTapPoint) {
@@ -297,7 +266,7 @@ 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;
                 }
@@ -305,7 +274,7 @@ 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;
                 }
@@ -346,9 +315,9 @@ 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));
@@ -357,7 +326,7 @@ 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];
 }
@@ -366,9 +335,9 @@ 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];
         }
@@ -403,27 +372,18 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)selectButtonTapped:(FLEXToolbarItem *)sender
 {
-    if (self.currentMode == FLEXExplorerModeSelect) {
-        self.currentMode = FLEXExplorerModeDefault;
-    } else {
-        self.currentMode = FLEXExplorerModeSelect;
-    }
+    [self toggleSelectTool];
 }
 
 - (void)hierarchyButtonTapped:(FLEXToolbarItem *)sender
 {
-    NSArray *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];
+    [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];
@@ -433,25 +393,6 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return allViews;
 }
 
-- (NSArray *)allWindows
-{
-    NSMutableArray *windows = [[[UIApplication sharedApplication] windows] mutableCopy];
-    UIWindow *statusWindow = [self statusWindow];
-    if (statusWindow) {
-        // The windows are ordered back to front, so default to inserting the status bar at the end.
-        // However, it there are windows at status bar level, insert the status bar before them.
-        NSInteger insertionIndex = [windows count];
-        for (UIWindow *window in windows) {
-            if (window.windowLevel >= UIWindowLevelStatusBar) {
-                insertionIndex = [windows indexOfObject:window];
-                break;
-            }
-        }
-        [windows insertObject:statusWindow atIndex:insertionIndex];
-    }
-    return windows;
-}
-
 - (UIWindow *)statusWindow
 {
     NSString *statusBarString = [NSString stringWithFormat:@"%@arWindow", @"_statusB"];
@@ -460,20 +401,12 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)moveButtonTapped:(FLEXToolbarItem *)sender
 {
-    if (self.currentMode == FLEXExplorerModeMove) {
-        self.currentMode = FLEXExplorerModeDefault;
-    } else {
-        self.currentMode = FLEXExplorerModeMove;
-    }
+    [self toggleMoveTool];
 }
 
 - (void)globalsButtonTapped:(FLEXToolbarItem *)sender
 {
-    FLEXGlobalsTableViewController *globalsViewController = [[FLEXGlobalsTableViewController alloc] init];
-    globalsViewController.delegate = self;
-    [FLEXGlobalsTableViewController setApplicationWindow:[[UIApplication sharedApplication] keyWindow]];
-    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:globalsViewController];
-    [self makeKeyAndPresentViewController:navigationController animated:YES completion:nil];
+    [self toggleMenuTool];
 }
 
 - (void)closeButtonTapped:(FLEXToolbarItem *)sender
@@ -533,14 +466,24 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     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
@@ -580,7 +523,11 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     // Only if we're in selection mode
     if (self.currentMode == FLEXExplorerModeSelect && tapGR.state == UIGestureRecognizerStateRecognized) {
-        [self updateOutlineViewsForSelectionPoint:[tapGR locationInView:nil]];
+        // Note that [tapGR locationInView:nil] is broken in iOS 8, so we have to do a two step conversion to window coordinates.
+        // Thanks to @lascorbe for finding this: https://github.com/Flipboard/FLEX/pull/31
+        CGPoint tapPointInView = [tapGR locationInView:self.view];
+        CGPoint tapPointInWindow = [self.view convertPoint:tapPointInView toView:nil];
+        [self updateOutlineViewsForSelectionPoint:tapPointInWindow];
     }
 }
 
@@ -593,8 +540,8 @@ 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];
@@ -622,17 +569,17 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (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];
@@ -647,7 +594,7 @@ 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]) {
+    for (UIWindow *window in [[FLEXUtility allWindows] reverseObjectEnumerator]) {
         // Ignore the explorer's own window.
         if (window != self.view.window) {
             if ([window hitTest:tapPointInWindow withEvent:nil]) {
@@ -661,9 +608,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     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) {
@@ -685,9 +632,9 @@ 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]];
@@ -695,9 +642,9 @@ 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;
@@ -735,12 +682,39 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 {
     CGPoint translation = [movePanGR translationInView:self.selectedView.superview];
     CGRect newSelectedViewFrame = self.selectedViewFrameBeforeDragging;
-    newSelectedViewFrame.origin.x = floor(newSelectedViewFrame.origin.x + translation.x);
-    newSelectedViewFrame.origin.y = floor(newSelectedViewFrame.origin.y + translation.y);
+    newSelectedViewFrame.origin.x = FLEXFloor(newSelectedViewFrame.origin.x + translation.x);
+    newSelectedViewFrame.origin.y = FLEXFloor(newSelectedViewFrame.origin.y + translation.y);
     self.selectedView.frame = newSelectedViewFrame;
 }
 
 
+#pragma mark - Safe Area Handling
+
+- (CGRect)viewSafeArea
+{
+    CGRect safeArea = self.view.bounds;
+#if FLEX_AT_LEAST_IOS11_SDK
+    if (@available(iOS 11, *)) {
+        safeArea = UIEdgeInsetsInsetRect(self.view.bounds, self.view.safeAreaInsets);
+    }
+#endif
+    return safeArea;
+}
+
+#if FLEX_AT_LEAST_IOS11_SDK
+- (void)viewSafeAreaInsetsDidChange
+{
+  if (@available(iOS 11, *)) {
+    [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)];
+}
+#endif
+
+
 #pragma mark - Touch Handling
 
 - (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates
@@ -779,7 +753,7 @@ 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]) {
@@ -830,11 +804,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     // 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.
-    // Only for iOS 7+
-    if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
-        self.previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle];
-        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
-    }
+    self.previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle];
+    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
     
     // Show the view controller.
     [self presentViewController:viewController animated:animated completion:completion];
@@ -842,21 +813,129 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)resignKeyAndDismissViewControllerAnimated:(BOOL)animated completion:(void (^)(void))completion
 {
-    [self.previousKeyWindow makeKeyWindow];
-    
+    UIWindow *previousKeyWindow = self.previousKeyWindow;
     self.previousKeyWindow = nil;
+    [previousKeyWindow makeKeyWindow];
+    [[previousKeyWindow rootViewController] setNeedsStatusBarAppearanceUpdate];
     
     // Restore the status bar window's normal window level.
     // 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.
-    // Only for iOS 7+
-    if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
-        [[UIApplication sharedApplication] setStatusBarStyle:self.previousStatusBarStyle];
-    }
+    [[UIApplication sharedApplication] setStatusBarStyle:self.previousStatusBarStyle];
     
     [self dismissViewControllerAnimated:animated completion:completion];
 }
 
+- (BOOL)wantsWindowToBecomeKey
+{
+    return self.previousKeyWindow != nil;
+}
+
+- (void)toggleToolWithViewControllerProvider:(UIViewController *(^)(void))future completion:(void(^)(void))completion
+{
+    if (self.presentedViewController) {
+        [self resignKeyAndDismissViewControllerAnimated:YES completion:completion];
+    } else {
+        [self makeKeyAndPresentViewController:future() animated:YES completion:completion];
+    }
+}
+
+#pragma mark - Keyboard Shortcut Helpers
+
+- (void)toggleSelectTool
+{
+    if (self.currentMode == FLEXExplorerModeSelect) {
+        self.currentMode = FLEXExplorerModeDefault;
+    } else {
+        self.currentMode = FLEXExplorerModeSelect;
+    }
+}
+
+- (void)toggleMoveTool
+{
+    if (self.currentMode == FLEXExplorerModeMove) {
+        self.currentMode = FLEXExplorerModeDefault;
+    } else {
+        self.currentMode = FLEXExplorerModeMove;
+    }
+}
+
+- (void)toggleViewsTool
+{
+    [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;
+        return [[UINavigationController alloc] initWithRootViewController:hierarchyTVC];
+    } completion:^{
+        if (completion) {
+            completion();
+        }
+    }];
+}
+
+- (void)toggleMenuTool
+{
+    [self toggleToolWithViewControllerProvider:^UIViewController *{
+        FLEXGlobalsTableViewController *globalsViewController = [[FLEXGlobalsTableViewController alloc] init];
+        globalsViewController.delegate = self;
+        [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];
+        self.selectedView.frame = frame;
+    } 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];
+        }
+    }
+}
+
+- (void)handleUpArrowKeyPressed
+{
+    if (self.currentMode == FLEXExplorerModeMove) {
+        CGRect frame = self.selectedView.frame;
+        frame.origin.y -= 1.0 / [[UIScreen mainScreen] scale];
+        self.selectedView.frame = frame;
+    } else if (self.currentMode == FLEXExplorerModeSelect && [self.viewsAtTapPoint count] > 0) {
+        NSInteger selectedViewIndex = [self.viewsAtTapPoint indexOfObject:self.selectedView];
+        if (selectedViewIndex < [self.viewsAtTapPoint count] - 1) {
+            self.selectedView = [self.viewsAtTapPoint objectAtIndex:selectedViewIndex + 1];
+        }
+    }
+}
+
+- (void)handleRightArrowKeyPressed
+{
+    if (self.currentMode == FLEXExplorerModeMove) {
+        CGRect frame = self.selectedView.frame;
+        frame.origin.x += 1.0 / [[UIScreen mainScreen] scale];
+        self.selectedView.frame = frame;
+    }
+}
+
+- (void)handleLeftArrowKeyPressed
+{
+    if (self.currentMode == FLEXExplorerModeMove) {
+        CGRect frame = self.selectedView.frame;
+        frame.origin.x -= 1.0 / [[UIScreen mainScreen] scale];
+        self.selectedView.frame = frame;
+    }
+}
+
 @end

Classes/ExplorerInterface/FLEXWindow.h

@@ -19,5 +19,6 @@
 @protocol FLEXWindowEventDelegate <NSObject>
 
 - (BOOL)shouldHandleTouchAtPoint:(CGPoint)pointInWindow;
+- (BOOL)canBecomeKeyWindow;
 
 @end

Classes/ExplorerInterface/FLEXWindow.m

@@ -0,0 +1,67 @@
+//
+//  FLEXWindow.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 4/13/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import "FLEXWindow.h"
+#import <objc/runtime.h>
+
+@implementation FLEXWindow
+
+- (id)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        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.
+        // UIWindowLevelStatusBar + 100 seems to hit that balance.
+        self.windowLevel = UIWindowLevelStatusBar + 100.0;
+    }
+    return self;
+}
+
+- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
+{
+    BOOL pointInside = NO;
+    if ([self.eventDelegate shouldHandleTouchAtPoint:point]) {
+        pointInside = [super pointInside:point withEvent:event];
+    }
+    return pointInside;
+}
+
+- (BOOL)shouldAffectStatusBarAppearance
+{
+    return [self isKeyWindow];
+}
+
+- (BOOL)canBecomeKeyWindow
+{
+    return [self.eventDelegate canBecomeKeyWindow];
+}
+
++ (void)initialize
+{
+    // 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...
+    NSString *canAffectSelectorString = [@[@"_can", @"Affect", @"Status", @"Bar", @"Appearance"] componentsJoinedByString:@""];
+    SEL canAffectSelector = NSSelectorFromString(canAffectSelectorString);
+    Method shouldAffectMethod = class_getInstanceMethod(self, @selector(shouldAffectStatusBarAppearance));
+    IMP canAffectImplementation = method_getImplementation(shouldAffectMethod);
+    class_addMethod(self, canAffectSelector, canAffectImplementation, method_getTypeEncoding(shouldAffectMethod));
+
+    // One more...
+    NSString *canBecomeKeySelectorString = [NSString stringWithFormat:@"_%@", NSStringFromSelector(@selector(canBecomeKeyWindow))];
+    SEL canBecomeKeySelector = NSSelectorFromString(canBecomeKeySelectorString);
+    Method canBecomeKeyMethod = class_getInstanceMethod(self, @selector(canBecomeKeyWindow));
+    IMP canBecomeKeyImplementation = method_getImplementation(canBecomeKeyMethod);
+    class_addMethod(self, canBecomeKeySelector, canBecomeKeyImplementation, method_getTypeEncoding(canBecomeKeyMethod));
+}
+
+@end

Classes/FLEX.h

@@ -0,0 +1,9 @@
+//
+//  FLEX.h
+//  FLEX
+//
+//  Created by Eric Horacek on 7/18/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import <FLEX/FLEXManager.h>

Classes/FLEXManager.h

@@ -0,0 +1,80 @@
+//
+//  FLEXManager.h
+//  Flipboard
+//
+//  Created by Ryan Olson on 4/4/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+@interface FLEXManager : NSObject
+
++ (instancetype)sharedManager;
+
+@property (nonatomic, readonly) BOOL isHidden;
+
+- (void)showExplorer;
+- (void)hideExplorer;
+- (void)toggleExplorer;
+
+#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 pruned under memory pressure.
+@property (nonatomic, assign, getter=isNetworkDebuggingEnabled) BOOL networkDebuggingEnabled;
+
+/// Defaults to 25 MB if never set. Values set here are presisted 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;
+
+/// 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
+
+/// Simulator keyboard shortcuts are enabled by default.
+/// 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;
+
+/// 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
+/// @param modifiers Modifier keys such as shift, command, or alt/option
+/// @param action The block to run on the main thread when the key & modifier combination is recognized.
+/// @param description Shown the the keyboard shortcut help menu, which is accessed via the '?' key.
+/// @note The action block will be retained for the duration of the application. You may want to use weak references.
+/// @note FLEX registers several default keyboard shortcuts. Use the '?' key to see a list of shortcuts.
+- (void)registerSimulatorShortcutWithKey:(NSString *)key modifiers:(UIKeyModifierFlags)modifiers action:(dispatch_block_t)action description:(NSString *)description;
+
+#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.
+/// Passing a block that returns an object allows you to display information about an object whose actual pointer may change at runtime (e.g. +currentUser)
+/// @note This method must be called from the main thread.
+/// The objectFutureBlock will be invoked from the main thread and may 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)registerGlobalEntryWithName:(NSString *)entryName objectFutureBlock:(id (^)(void))objectFutureBlock;
+
+/// 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 viewControllerFutureBlock When you tap on the row, view controller returned by this block will be pushed on the navigation controller stack.
+/// @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)registerGlobalEntryWithName:(NSString *)entryName
+          viewControllerFutureBlock:(UIViewController * (^)(void))viewControllerFutureBlock;
+
+@end

Classes/Global State Explorers/FLEXFileBrowserTableViewController.m

@@ -1,181 +0,0 @@
-//
-//  FLEXFileBrowserTableViewController.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 6/9/14.
-//
-//
-
-#import "FLEXFileBrowserTableViewController.h"
-#import "FLEXUtility.h"
-#import "FLEXWebViewController.h"
-#import "FLEXImagePreviewViewController.h"
-
-@interface FLEXFileBrowserTableViewController ()
-
-@property (nonatomic, copy) NSString *path;
-@property (nonatomic, copy) NSArray *childPaths;
-@property (nonatomic, strong) NSNumber *recursiveSize;
-
-@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];
-        
-        FLEXFileBrowserTableViewController *__weak weakSelf = self;
-        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-            NSFileManager *fileManager = [[NSFileManager alloc] init];
-            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.childPaths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:NULL];
-    }
-    return self;
-}
-
-
-#pragma mark - Table view data source
-
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
-{
-    return 1;
-}
-
-- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
-{
-    return [self.childPaths count];
-}
-
-- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
-{
-    NSString *sizeString = nil;
-    if (!self.recursiveSize) {
-        sizeString = @"Computing size…";
-    } else {
-        sizeString = [NSByteCountFormatter stringFromByteCount:[self.recursiveSize longLongValue] countStyle:NSByteCountFormatterCountStyleFile];
-    }
-    
-    return [NSString stringWithFormat:@"%lu files (%@)", (unsigned long)[self.childPaths count], sizeString];
-}
-
-- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
-    NSString *fullPath = [self.path stringByAppendingPathComponent:subpath];
-    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 = [[UITableViewCell 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 = [subpath 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 = [self.childPaths objectAtIndex:indexPath.row];
-    NSString *fullPath = [self.path stringByAppendingPathComponent:subpath];
-    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"]) {
-                NSData *fileData = [NSData dataWithContentsOfFile:fullPath];
-                id jsonObject = [NSJSONSerialization JSONObjectWithData:fileData options:0 error:NULL];
-                prettyString = [[NSString alloc] initWithData:[NSJSONSerialization dataWithJSONObject:jsonObject options:NSJSONWritingPrettyPrinted error:NULL] encoding:NSUTF8StringEncoding];
-            } 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.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];
-    }
-}
-
-@end

Classes/Global State Explorers/FLEXInstancesTableViewController.m

@@ -1,126 +0,0 @@
-//
-//  FLEXInstancesTableViewController.m
-//  Flipboard
-//
-//  Created by Ryan Olson on 5/28/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import "FLEXInstancesTableViewController.h"
-#import "FLEXObjectExplorerFactory.h"
-#import "FLEXObjectExplorerViewController.h"
-#import "FLEXRuntimeUtility.h"
-#import "FLEXUtility.h"
-#import "FLEXHeapEnumerator.h"
-
-@interface FLEXInstancesTableViewController ()
-
-@property (nonatomic, strong) NSArray *instances;
-@property (nonatomic, strong) NSArray *fieldNames;
-
-@end
-
-@implementation FLEXInstancesTableViewController
-
-+ (instancetype)instancesTableViewControllerForClassName:(NSString *)className
-{
-    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.
-            // 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];
-        }
-    }];
-    FLEXInstancesTableViewController *instancesViewController = [[self alloc] init];
-    instancesViewController.instances = instances;
-    instancesViewController.title = [NSString stringWithFormat:@"%@ (%lu)", className, (unsigned long)[instances count]];
-    return instancesViewController;
-}
-
-+ (instancetype)instancesTableViewControllerForInstancesReferencingObject:(id)object
-{
-    NSMutableArray *instances = [NSMutableArray array];
-    NSMutableArray *fieldNames = [NSMutableArray array];
-    [FLEXHeapEnumerator enumerateLiveObjectsUsingBlock:^(__unsafe_unretained id tryObject, __unsafe_unretained Class actualClass) {
-        // 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;
-        while (tryClass) {
-            unsigned int ivarCount = 0;
-            Ivar *ivars = class_copyIvarList(tryClass, &ivarCount);
-            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]) {
-                    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))];
-                        return;
-                    }
-                }
-            }
-            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;
-}
-
-
-#pragma mark - Table View Data Source
-
-- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
-{
-    return 1;
-}
-
-- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
-{
-    return [self.instances count];
-}
-
-- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    static NSString *CellIdentifier = @"Cell";
-    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
-    if (!cell) {
-        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
-        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
-        UIFont *cellFont = [FLEXUtility defaultTableViewCellLabelFont];
-        cell.textLabel.font = cellFont;
-        cell.detailTextLabel.font = cellFont;
-        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];
-    
-    return cell;
-}
-
-
-#pragma mark - Table View Delegate
-
-- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
-{
-    id instance = [self.instances objectAtIndex:indexPath.row];
-    FLEXObjectExplorerViewController *drillInViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:instance];
-    [self.navigationController pushViewController:drillInViewController animated:YES];
-}
-
-@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 +1,341 @@
+//
+//  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, strong) UIScrollView *contentScrollView;
+@property (nonatomic, strong) UIScrollView *headerScrollView;
+@property (nonatomic, strong) UITableView  *leftTableView;
+@property (nonatomic, strong) UITableView  *contentTableView;
+@property (nonatomic, strong) UIView       *leftHeader;
+
+@property (nonatomic, strong) NSDictionary<NSString *, NSNumber *> *sortStatusDict;
+@property (nonatomic, strong) 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 contentWidth = 0.0;
+    NSInteger rowsCount = [self numberOfColumns];
+    for (int i = 0; i < rowsCount; i++) {
+        contentWidth += [self contentWidthForColumn:i];
+    }
+    
+    self.leftTableView.frame           = CGRectMake(0, topheaderHeight, leftHeaderWidth, height - topheaderHeight);
+    self.headerScrollView.frame        = CGRectMake(leftHeaderWidth, 0, 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);
+    self.contentScrollView.frame       = CGRectMake(leftHeaderWidth, topheaderHeight, width - leftHeaderWidth, height - topheaderHeight);
+    self.contentScrollView.contentSize = self.contentTableView.frame.size;
+    self.leftHeader.frame              = CGRectMake(0, 0, [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 alloc] init];
+    headerScrollView.delegate      = self;
+    self.headerScrollView          = headerScrollView;
+    self.headerScrollView.backgroundColor =  [UIColor colorWithWhite:0.803 alpha:0.850];
+    
+    [self addSubview:headerScrollView];
+}
+
+- (void)loadContentScrollView
+{
+    
+    UIScrollView *scrollView = [[UIScrollView alloc] init];
+    scrollView.bounces       = NO;
+    scrollView.delegate      = self;
+    
+    UITableView *tableView   = [[UITableView alloc] init];
+    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 alloc] init];
+    leftTableView.delegate       = self;
+    leftTableView.dataSource     = self;
+    leftTableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    self.leftTableView           = leftTableView;
+    [self addSubview:leftTableView];
+    
+    UIView *leftHeader = [[UIView alloc] init];
+    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, strong) 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 alloc] init];
+    [(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
+//  UICatalog
+//
+//  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, strong) UILabel *label;
+
+- (void)changeSortStatusWithType:(FLEXTableColumnHeaderSortType)type;
+
+@end
+

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableColumnHeader.m

@@ -0,0 +1,60 @@
+//
+//  FLEXTableContentHeaderCell.m
+//  UICatalog
+//
+//  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
+//  UICatalog
+//
+//  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, strong) 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
+//  UICatalog
+//
+//  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, strong) NSArray<NSString *> *columnsArray;
+@property (nonatomic, strong) 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, strong) FLEXMultiColumnTableView *multiColumView;
+
+@end
+
+@implementation FLEXTableContentViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.edgesForExtendedLayout = UIRectEdgeNone;
+    [self.view addSubview:self.multiColumView];
+}
+
+- (void)viewWillAppear:(BOOL)animated
+{
+    [super viewWillAppear:animated];
+    [self.multiColumView reloadData];
+}
+
+#pragma mark -
+
+#pragma mark init SubView
+- (FLEXMultiColumnTableView *)multiColumView {
+    if (!_multiColumView) {
+        _multiColumView = [[FLEXMultiColumnTableView alloc] initWithFrame:
+                           CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
+        
+        _multiColumView.autoresizingMask          = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin;
+        _multiColumView.backgroundColor           = [UIColor whiteColor];
+        _multiColumView.dataSource                = self;
+        _multiColumView.delegate                  = self;
+    }
+    return _multiColumView;
+}
+#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 *contentReverseEvumerator = [sortContentData reverseObjectEnumerator];
+        sortContentData = [NSArray arrayWithArray:[contentReverseEvumerator allObjects]];
+    }
+    
+    self.contentsArray = sortContentData;
+    [self.multiColumView 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->_multiColumView.frame = CGRectMake(0, 32, self.view.frame.size.width, self.view.frame.size.height - 32);
+        }
+        else {
+            self->_multiColumView.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
+//  UICatalog
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXTableLeftCell : UITableViewCell
+
+@property (nonatomic, strong) UILabel *titlelabel;
+
++ (instancetype)cellWithTableView:(UITableView *)tableView;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableLeftCell.m

@@ -0,0 +1,35 @@
+//
+//  FLEXTableLeftCell.m
+//  UICatalog
+//
+//  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 <UIKit/UIKit.h>
+
+@interface FLEXTableListViewController : UITableViewController
+
++ (BOOL)supportsExtension:(NSString *)extension;
+- (instancetype)initWithPath:(NSString *)path;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableListViewController.m

@@ -0,0 +1,137 @@
+//
+//  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, strong) NSArray<NSString *> *tables;
+
++ (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;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.tables.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.tables[indexPath.row];
+    return cell;
+}
+
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXTableContentViewController *contentViewController = [[FLEXTableContentViewController alloc] init];
+    
+    contentViewController.contentsArray = [_dbm queryAllDataWithTableName:self.tables[indexPath.row]];
+    contentViewController.columnsArray = [_dbm queryAllColumnsWithTableName:self.tables[indexPath.row]];
+    
+    contentViewController.title = self.tables[indexPath.row];
+    [self.navigationController pushViewController:contentViewController animated:YES];
+}
+
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return [NSString stringWithFormat:@"%lu tables", (unsigned long)self.tables.count];
+}
+
++ (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/FLEXClassesTableViewController.m

@@ -14,8 +14,8 @@
 
 @interface FLEXClassesTableViewController () <UISearchBarDelegate>
 
-@property (nonatomic, strong) NSArray *classNames;
-@property (nonatomic, strong) NSArray *filteredClassNames;
+@property (nonatomic, strong) NSArray<NSString *> *classNames;
+@property (nonatomic, strong) NSArray<NSString *> *filteredClassNames;
 @property (nonatomic, strong) UISearchBar *searchBar;
 
 @end
@@ -42,7 +42,7 @@
     }
 }
 
-- (void)setClassNames:(NSArray *)classNames
+- (void)setClassNames:(NSArray<NSString *> *)classNames
 {
     _classNames = classNames;
     self.filteredClassNames = classNames;
@@ -53,7 +53,7 @@
     unsigned int classNamesCount = 0;
     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];
@@ -68,7 +68,7 @@
 
 - (void)updateTitle
 {
-    NSString *shortImageName = [[self.binaryImageName componentsSeparatedByString:@"/"] lastObject];
+    NSString *shortImageName = self.binaryImageName.lastPathComponent;
     self.title = [NSString stringWithFormat:@"%@ Classes (%lu)", shortImageName, (unsigned long)[self.filteredClassNames count]];
 }
 
@@ -87,6 +87,11 @@
     [self.tableView reloadData];
 }
 
+- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
+{
+    [searchBar resignFirstResponder];
+}
+
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
 {
     // Dismiss the keyboard when interacting with filtered results.
@@ -126,7 +131,7 @@
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    NSString *className = [self.filteredClassNames objectAtIndex:indexPath.row];
+    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

@@ -0,0 +1,13 @@
+//
+//  FLEXCookiesTableViewController.h
+//  FLEX
+//
+//  Created by Rich Robinson on 19/10/2015.
+//  Copyright © 2015 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXCookiesTableViewController : UITableViewController
+
+@end

Classes/GlobalStateExplorers/FLEXCookiesTableViewController.m

@@ -0,0 +1,71 @@
+//
+//  FLEXCookiesTableViewController.m
+//  FLEX
+//
+//  Created by Rich Robinson on 19/10/2015.
+//  Copyright © 2015 Flipboard. All rights reserved.
+//
+
+#import "FLEXCookiesTableViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXUtility.h"
+
+@interface FLEXCookiesTableViewController ()
+
+@property (nonatomic, strong) NSArray<NSHTTPCookie *> *cookies;
+
+@end
+
+@implementation FLEXCookiesTableViewController
+
+- (id)initWithStyle:(UITableViewStyle)style {
+    self = [super initWithStyle:style];
+    
+    if (self) {
+        self.title = @"Cookies";
+
+        NSSortDescriptor *nameSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)];
+        _cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage].cookies sortedArrayUsingDescriptors:@[nameSortDescriptor]];
+    }
+    
+    return self;
+}
+
+- (NSHTTPCookie *)cookieForRowAtIndexPath:(NSIndexPath *)indexPath {
+    return self.cookies[indexPath.row];
+}
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
+    return 1;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    return self.cookies.count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    static NSString *CellIdentifier = @"Cell";
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+    if (!cell) {
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
+        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.detailTextLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.detailTextLabel.textColor = [UIColor grayColor];
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+    }
+    
+    NSHTTPCookie *cookie = [self cookieForRowAtIndexPath:indexPath];
+    cell.textLabel.text = [NSString stringWithFormat:@"%@ (%@)", cookie.name, cookie.value];
+    cell.detailTextLabel.text = cookie.domain;
+    
+    return cell;
+}
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSHTTPCookie *cookie = [self cookieForRowAtIndexPath:indexPath];
+    UIViewController *cookieViewController = (UIViewController *)[FLEXObjectExplorerFactory explorerViewControllerForObject:cookie];
+    
+    [self.navigationController pushViewController:cookieViewController animated:YES];
+}
+
+@end

Classes/GlobalStateExplorers/FLEXFileBrowserFileOperationController.h

@@ -0,0 +1,33 @@
+//
+//  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

@@ -0,0 +1,142 @@
+//
+//  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/FLEXFileBrowserSearchOperation.h

@@ -0,0 +1,25 @@
+//
+//  FLEXFileBrowserSearchOperation.h
+//  UICatalog
+//
+//  Created by 啟倫 陳 on 2014/8/4.
+//  Copyright (c) 2014年 f. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@protocol FLEXFileBrowserSearchOperationDelegate;
+
+@interface FLEXFileBrowserSearchOperation : NSOperation
+
+@property (nonatomic, weak) id<FLEXFileBrowserSearchOperationDelegate> delegate;
+
+- (id)initWithPath:(NSString *)currentPath searchString:(NSString *)searchString;
+
+@end
+
+@protocol FLEXFileBrowserSearchOperationDelegate <NSObject>
+
+- (void)fileBrowserSearchOperationResult:(NSArray<NSString *> *)searchResult size:(uint64_t)size;
+
+@end

Classes/GlobalStateExplorers/FLEXFileBrowserSearchOperation.m

@@ -0,0 +1,123 @@
+//
+//  FLEXFileBrowserSearchOperation.m
+//  UICatalog
+//
+//  Created by 啟倫 陳 on 2014/8/4.
+//  Copyright (c) 2014年 f. All rights reserved.
+//
+
+#import "FLEXFileBrowserSearchOperation.h"
+
+@implementation NSMutableArray (FLEXStack)
+
+- (void)flex_push:(id)anObject
+{
+    [self addObject:anObject];
+}
+
+- (id)flex_pop
+{
+    id anObject = [self lastObject];
+    [self removeLastObject];
+    return anObject;
+}
+
+@end
+
+@interface FLEXFileBrowserSearchOperation ()
+
+@property (nonatomic, strong) NSString *path;
+@property (nonatomic, strong) NSString *searchString;
+
+@end
+
+@implementation FLEXFileBrowserSearchOperation
+
+#pragma mark - private
+
+- (uint64_t)totalSizeAtPath:(NSString *)path
+{
+    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];
+    }
+    return totalSize;
+}
+
+#pragma mark - instance method
+
+- (id)initWithPath:(NSString *)currentPath searchString:(NSString *)searchString
+{
+    self = [super init];
+    if (self) {
+        self.path = currentPath;
+        self.searchString = searchString;
+    }
+    return self;
+}
+
+#pragma mark - methods to override
+
+- (void)main
+{
+    NSFileManager *fileManager = [NSFileManager defaultManager];
+    NSMutableArray<NSString *> *searchPaths = [NSMutableArray array];
+    NSMutableDictionary<NSString *, NSNumber *> *sizeMapping = [NSMutableDictionary dictionary];
+    uint64_t totalSize = 0;
+    NSMutableArray<NSString *> *stack = [NSMutableArray array];
+    [stack flex_push:self.path];
+    
+    //recursive found all match searchString paths, and precomputing there size
+    while ([stack count]) {
+        NSString *currentPath = [stack flex_pop];
+        NSArray<NSString *> *directoryPath = [fileManager contentsOfDirectoryAtPath:currentPath error:nil];
+        
+        for (NSString *subPath in directoryPath) {
+            NSString *fullPath = [currentPath stringByAppendingPathComponent:subPath];
+            
+            if ([[subPath lowercaseString] rangeOfString:[self.searchString lowercaseString]].location != NSNotFound) {
+                [searchPaths addObject:fullPath];
+                if (!sizeMapping[fullPath]) {
+                    uint64_t fullPathSize = [self totalSizeAtPath:fullPath];
+                    totalSize += fullPathSize;
+                    [sizeMapping setObject:@(fullPathSize) forKey:fullPath];
+                }
+            }
+            BOOL isDirectory;
+            if ([fileManager fileExistsAtPath:fullPath isDirectory:&isDirectory] && isDirectory) {
+                [stack flex_push:fullPath];
+            }
+            
+            if ([self isCancelled]) {
+                return;
+            }
+        }
+    }
+    
+    //sort
+    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) {
+            return NSOrderedAscending;
+        } else if (pathSize1 > pathSize2) {
+            return NSOrderedDescending;
+        } else {
+            return NSOrderedSame;
+        }
+    }];
+    
+    if ([self isCancelled]) {
+        return;
+    }
+    
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.delegate fileBrowserSearchOperationResult:sortedArray size:totalSize];
+    });
+}
+
+@end

Classes/GlobalStateExplorers/FLEXFileBrowserTableViewController.h

@@ -8,6 +8,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import "FLEXFileBrowserSearchOperation.h"
+
 @interface FLEXFileBrowserTableViewController : UITableViewController
 
 - (id)initWithPath:(NSString *)path;

Classes/GlobalStateExplorers/FLEXFileBrowserTableViewController.m

@@ -0,0 +1,376 @@
+//
+//  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"
+#import "FLEXTableListViewController.h"
+
+@interface FLEXFileBrowserTableViewCell : UITableViewCell
+@end
+
+@interface FLEXFileBrowserTableViewController () <FLEXFileBrowserFileOperationControllerDelegate, FLEXFileBrowserSearchOperationDelegate, UISearchResultsUpdating, UISearchControllerDelegate>
+
+@property (nonatomic, copy) NSString *path;
+@property (nonatomic, copy) NSArray<NSString *> *childPaths;
+@property (nonatomic, strong) NSArray<NSString *> *searchPaths;
+@property (nonatomic, strong) NSNumber *recursiveSize;
+@property (nonatomic, strong) NSNumber *searchPathsSize;
+@property (nonatomic, strong) UISearchController *searchController;
+@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];
+
+        self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
+        self.searchController.searchResultsUpdater = self;
+        self.searchController.delegate = self;
+        self.searchController.dimsBackgroundDuringPresentation = NO;
+        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<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 reloadChildPaths];
+    }
+    return self;
+}
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+}
+
+#pragma mark - FLEXFileBrowserSearchOperationDelegate
+
+- (void)fileBrowserSearchOperationResult:(NSArray<NSString *> *)searchResult size:(uint64_t)size
+{
+    self.searchPaths = searchResult;
+    self.searchPathsSize = @(size);
+    [self.tableView reloadData];
+}
+
+#pragma mark - UISearchResultsUpdating
+
+- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
+{
+    [self reloadDisplayedPaths];
+}
+
+#pragma mark - UISearchControllerDelegate
+
+- (void)willDismissSearchController:(UISearchController *)searchController
+{
+    [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
+{
+    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 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 *fullPath = [self filePathAtIndexPath:indexPath];
+    NSString *subpath = [fullPath lastPathComponent];
+    NSString *pathExtension = [subpath pathExtension];
+
+    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: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 ([pathExtension isEqual:@"archive"] || [pathExtension isEqual:@"coded"]) {
+                prettyString = [[NSKeyedUnarchiver unarchiveObjectWithFile:fullPath] description];
+            } else if ([pathExtension isEqualToString:@"json"]) {
+                prettyString = [FLEXUtility prettyJSONStringFromData:[NSData dataWithContentsOfFile:fullPath]];
+            } else if ([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:pathExtension]) {
+                drillInViewController = [[FLEXWebViewController alloc] initWithURL:[NSURL fileURLWithPath:fullPath]];
+            } else if ([FLEXTableListViewController supportsExtension:subpath.pathExtension]) {
+                drillInViewController = [[FLEXTableListViewController alloc] initWithPath: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
+{
+    UIMenuItem *renameMenuItem = [[UIMenuItem alloc] initWithTitle:@"Rename" action:@selector(fileBrowserRename:)];
+    UIMenuItem *deleteMenuItem = [[UIMenuItem alloc] initWithTitle:@"Delete" action:@selector(fileBrowserDelete:)];
+    NSMutableArray *menus = [NSMutableArray arrayWithObjects:renameMenuItem, deleteMenuItem, nil];
+
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+    NSError *error = nil;
+    NSDictionary *attributes = [NSFileManager.defaultManager attributesOfItemAtPath:fullPath error:&error];
+    if (error == nil && [attributes fileType] != NSFileTypeDirectory) {
+        UIMenuItem *shareMenuItem = [[UIMenuItem alloc] initWithTitle:@"Share" action:@selector(fileBrowserShare:)];
+        [menus addObject:shareMenuItem];
+    }
+    [UIMenuController sharedMenuController].menuItems = menus;
+
+    return YES;
+}
+
+- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
+{
+    return action == @selector(fileBrowserDelete:) || action == @selector(fileBrowserRename:) || 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.
+}
+
+#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
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+
+    self.fileOperationController = [[FLEXFileBrowserFileRenameOperationController alloc] initWithPath:fullPath];
+    self.fileOperationController.delegate = self;
+    [self.fileOperationController show];
+}
+
+- (void)fileBrowserDelete:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+
+    self.fileOperationController = [[FLEXFileBrowserFileDeleteOperationController alloc] initWithPath:fullPath];
+    self.fileOperationController.delegate = self;
+    [self.fileOperationController show];
+}
+
+- (void)fileBrowserShare:(UITableViewCell *)sender
+{
+    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
+    NSString *fullPath = [self filePathAtIndexPath:indexPath];
+
+    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[fullPath] applicationActivities:nil];
+    [self presentViewController:activityViewController animated:true completion:nil];
+}
+
+- (void)reloadDisplayedPaths
+{
+    if (self.searchController.isActive) {
+        [self reloadSearchPaths];
+    } else {
+        [self reloadChildPaths];
+    }
+    [self.tableView reloadData];
+}
+
+- (void)reloadChildPaths
+{
+    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)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.searchController.searchBar.text];
+    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)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];
+}
+
+- (void)fileBrowserShare:(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

@@ -14,19 +14,26 @@
 #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,
+    FLEXGlobalsRowMainBundle,
     FLEXGlobalsRowApplication,
     FLEXGlobalsRowKeyWindow,
     FLEXGlobalsRowMainScreen,
@@ -36,17 +43,15 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
 
 @interface FLEXGlobalsTableViewController ()
 
-/// [FLEXGlobalsTableViewControllerEntry *]
-@property (nonatomic, readonly, copy) NSArray *entries;
+@property (nonatomic, readonly, copy) NSArray<FLEXGlobalsTableViewControllerEntry *> *entries;
 
 @end
 
 @implementation FLEXGlobalsTableViewController
 
-/// [FLEXGlobalsTableViewControllerEntry *]
-+ (NSArray *)defaultGlobalEntries
++ (NSArray<FLEXGlobalsTableViewControllerEntry *> *)defaultGlobalEntries
 {
-    NSMutableArray *defaultGlobalEntries = [NSMutableArray array];
+    NSMutableArray<FLEXGlobalsTableViewControllerEntry *> *defaultGlobalEntries = [NSMutableArray array];
 
     for (FLEXGlobalsRow defaultRowIndex = 0; defaultRowIndex < FLEXGlobalsRowCount; defaultRowIndex++) {
         FLEXGlobalsTableViewControllerEntryNameFuture titleFuture = nil;
@@ -119,6 +124,16 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
                 };
                 break;
 
+            case FLEXGlobalsRowMainBundle:
+                titleFuture = ^NSString *{
+                    return @"📦  +[NSBundle mainBundle]";
+                };
+                viewControllerFuture = ^UIViewController *{
+                    NSBundle *mainBundle = [NSBundle mainBundle];
+                    return [FLEXObjectExplorerFactory explorerViewControllerForObject:mainBundle];
+                };
+                break;
+
             case FLEXGlobalsRowApplication:
                 titleFuture = ^NSString *{
                     return @"💾  +[UIApplication sharedApplication]";
@@ -158,6 +173,15 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
                 };
                 break;
 
+            case FLEXGlobalsCookies:
+                titleFuture = ^NSString *{
+                    return @"🍪  Cookies";
+                };
+                viewControllerFuture = ^UIViewController *{
+                    return [[FLEXCookiesTableViewController alloc] init];
+                };
+                break;                
+                
             case FLEXGlobalsRowFileBrowser:
                 titleFuture = ^NSString *{
                     return @"📁  File Browser";
@@ -166,6 +190,24 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
                     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;
         }
@@ -183,7 +225,7 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
 {
     self = [super initWithStyle:style];
     if (self) {
-        self.title = @"🌎  Global State";
+        self.title = @"💪  FLEX";
         _entries = [[[self class] defaultGlobalEntries] arrayByAddingObjectsFromArray:[FLEXManager sharedManager].userGlobalEntries];
     }
     return self;
@@ -252,7 +294,7 @@ typedef NS_ENUM(NSUInteger, FLEXGlobalsRow) {
     if (!cell) {
         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
         cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
-        cell.textLabel.font = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.textLabel.font = [FLEXUtility defaultFontOfSize:14.0];
     }
 
     cell.textLabel.text = [self titleForRowAtIndexPath:indexPath];

Classes/GlobalStateExplorers/FLEXInstancesTableViewController.m

@@ -0,0 +1,240 @@
+//
+//  FLEXInstancesTableViewController.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 5/28/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import "FLEXInstancesTableViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXObjectExplorerViewController.h"
+#import "FLEXRuntimeUtility.h"
+#import "FLEXUtility.h"
+#import "FLEXHeapEnumerator.h"
+#import "FLEXObjectRef.h"
+#import <malloc/malloc.h>
+
+
+@interface FLEXInstancesTableViewController ()
+
+/// 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];
+    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.
+            // Ex. OS_dispatch_queue_specific_queue
+            // In the future, we could provide some kind of warning for classes that are known to be problematic.
+            if (malloc_size((__bridge const void *)(object)) > 0) {
+                [instances addObject:object];
+            }
+        }
+    }];
+    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<FLEXObjectRef *> *instances = [NSMutableArray array];
+    [FLEXHeapEnumerator enumerateLiveObjectsUsingBlock:^(__unsafe_unretained id tryObject, __unsafe_unretained Class actualClass) {
+        // 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;
+        while (tryClass) {
+            unsigned int ivarCount = 0;
+            Ivar *ivars = class_copyIvarList(tryClass, &ivarCount);
+            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]) {
+                    ptrdiff_t offset = ivar_getOffset(ivar);
+                    uintptr_t *fieldPointer = (__bridge void *)tryObject + offset;
+                    if (*fieldPointer == (uintptr_t)(__bridge void *)object) {
+                        [instances addObject:[FLEXObjectRef referencing:tryObject ivar:@(ivar_getName(ivar))]];
+                        return;
+                    }
+                }
+            }
+            tryClass = class_getSuperclass(tryClass);
+        }
+    }];
+
+    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;
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    return self.maxSections;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    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:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+        UIFont *cellFont = [FLEXUtility defaultTableViewCellLabelFont];
+        cell.textLabel.font = cellFont;
+        cell.detailTextLabel.font = cellFont;
+        cell.detailTextLabel.textColor = [UIColor grayColor];
+    }
+
+    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[indexPath.row].object;
+    FLEXObjectExplorerViewController *drillInViewController = [FLEXObjectExplorerFactory explorerViewControllerForObject:instance];
+    [self.navigationController pushViewController:drillInViewController animated:YES];
+}
+
+@end

Classes/GlobalStateExplorers/FLEXLibrariesTableViewController.m

@@ -9,14 +9,16 @@
 #import "FLEXLibrariesTableViewController.h"
 #import "FLEXUtility.h"
 #import "FLEXClassesTableViewController.h"
+#import "FLEXClassExplorerViewController.h"
 #import <objc/runtime.h>
 
 @interface FLEXLibrariesTableViewController () <UISearchBarDelegate>
 
-@property (nonatomic, strong) NSArray *imageNames;
-@property (nonatomic, strong) NSArray *filteredImageNames;
+@property (nonatomic, strong) NSArray<NSString *> *imageNames;
+@property (nonatomic, strong) NSArray<NSString *> *filteredImageNames;
 
 @property (nonatomic, strong) UISearchBar *searchBar;
+@property (nonatomic, strong) Class foundClass;
 
 @end
 
@@ -50,7 +52,7 @@
     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 +65,9 @@
         
         // 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 +76,14 @@
 
 - (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;
@@ -97,7 +97,7 @@
 - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
 {
     if ([searchText length] > 0) {
-        NSPredicate *searchPreidcate = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
+        NSPredicate *searchPreidcate = [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) {
@@ -109,9 +109,16 @@
     } else {
         self.filteredImageNames = self.imageNames;
     }
+    
+    self.foundClass = NSClassFromString(searchText);
     [self.tableView reloadData];
 }
 
+- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
+{
+    [searchBar resignFirstResponder];
+}
+
 
 #pragma mark - Table View Data Source
 
@@ -122,22 +129,32 @@
 
 - (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.searchBar.text];
+            return cell;
+        } else {
+            executablePath = self.filteredImageNames[indexPath.row-1];
+        }
+    } else {
+        executablePath = self.filteredImageNames[indexPath.row];
+    }
     
+    cell.textLabel.text = [self shortNameForImageName:executablePath];
     return cell;
 }
 
@@ -146,9 +163,15 @@
 
 - (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) {
+        FLEXClassExplorerViewController *objectExplorer = [FLEXClassExplorerViewController new];
+        objectExplorer.object = self.foundClass;
+        [self.navigationController pushViewController:objectExplorer animated:YES];
+    } else {
+        FLEXClassesTableViewController *classesViewController = [[FLEXClassesTableViewController alloc] init];
+        classesViewController.binaryImageName = self.filteredImageNames[self.foundClass ? indexPath.row-1 : indexPath.row];
+        [self.navigationController pushViewController:classesViewController animated:YES];
+    }
 }
 
 @end

Classes/GlobalStateExplorers/FLEXLiveObjectsTableViewController.m

@@ -14,12 +14,14 @@
 
 static const NSInteger kFLEXLiveObjectsSortAlphabeticallyIndex = 0;
 static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
+static const NSInteger kFLEXLiveObjectsSortBySizeIndex = 2;
 
 @interface FLEXLiveObjectsTableViewController () <UISearchBarDelegate>
 
-@property (nonatomic, strong) NSDictionary *instanceCountsForClassNames;
-@property (nonatomic, readonly) NSArray *allClassNames;
-@property (nonatomic, strong) NSArray *filteredClassNames;
+@property (nonatomic, strong) NSDictionary<NSString *, NSNumber *> *instanceCountsForClassNames;
+@property (nonatomic, strong) NSDictionary<NSString *, NSNumber *> *instanceSizesForClassNames;
+@property (nonatomic, readonly) NSArray<NSString *> *allClassNames;
+@property (nonatomic, strong) NSArray<NSString *> *filteredClassNames;
 @property (nonatomic, strong) UISearchBar *searchBar;
 
 @end
@@ -34,7 +36,7 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     self.searchBar.placeholder = [FLEXUtility searchBarPlaceholderText];
     self.searchBar.delegate = self;
     self.searchBar.showsScopeBar = YES;
-    self.searchBar.scopeButtonTitles = @[@"Sort Alphabetically", @"Sort by Count"];
+    self.searchBar.scopeButtonTitles = @[@"Sort Alphabetically", @"Sort by Count", @"Sort by Size"];
     [self.searchBar sizeToFit];
     self.tableView.tableHeaderView = self.searchBar;
     
@@ -44,7 +46,7 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     [self reloadTableData];
 }
 
-- (NSArray *)allClassNames
+- (NSArray<NSString *> *)allClassNames
 {
     return [self.instanceCountsForClassNames allKeys];
 }
@@ -57,33 +59,36 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     // While it might be a little cleaner to populate an NSMutableDictionary with class name string keys to NSNumber counts,
     // we choose the CF/primitives approach because it lets us enumerate the objects in the heap without allocating any memory during enumeration.
     // The alternative of creating one NSString/NSNumber per object on the heap ends up polluting the count of live objects quite a bit.
-    unsigned int count = 0;
-    Class *classes = objc_copyClassList(&count);
-    CFMutableDictionaryRef mutableCountsForClasses = CFDictionaryCreateMutable(NULL, count, NULL, NULL);
-    for (unsigned int i = 0; i < count; i++) {
+    unsigned int classCount = 0;
+    Class *classes = objc_copyClassList(&classCount);
+    CFMutableDictionaryRef mutableCountsForClasses = CFDictionaryCreateMutable(NULL, classCount, NULL, NULL);
+    for (unsigned int i = 0; i < classCount; i++) {
         CFDictionarySetValue(mutableCountsForClasses, (__bridge const void *)classes[i], (const void *)0);
     }
     
     // Enumerate all objects on the heap to build the counts of instances for each class.
     [FLEXHeapEnumerator enumerateLiveObjectsUsingBlock:^(__unsafe_unretained id object, __unsafe_unretained Class actualClass) {
-        NSUInteger count = (NSUInteger)CFDictionaryGetValue(mutableCountsForClasses, (__bridge const void *)actualClass);
-        count++;
-        CFDictionarySetValue(mutableCountsForClasses, (__bridge const void *)actualClass, (const void *)count);
+        NSUInteger instanceCount = (NSUInteger)CFDictionaryGetValue(mutableCountsForClasses, (__bridge const void *)actualClass);
+        instanceCount++;
+        CFDictionarySetValue(mutableCountsForClasses, (__bridge const void *)actualClass, (const void *)instanceCount);
     }];
     
     // 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];
-    for (unsigned int i = 0; i < count; i++) {
+    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 count = (NSUInteger)CFDictionaryGetValue(mutableCountsForClasses, (__bridge const void *)(class));
-        if (count > 0) {
-            NSString *className = @(class_getName(class));
-            [mutableCountsForClassNames setObject:@(count) forKey:className];
+        NSUInteger instanceCount = (NSUInteger)CFDictionaryGetValue(mutableCountsForClasses, (__bridge const void *)(class));
+        NSString *className = @(class_getName(class));
+        if (instanceCount > 0) {
+            [mutableCountsForClassNames setObject:@(instanceCount) forKey:className];
         }
+        [mutableSizesForClassNames setObject:@(class_getInstanceSize(class)) forKey:className];
     }
     free(classes);
     
     self.instanceCountsForClassNames = mutableCountsForClassNames;
+    self.instanceSizesForClassNames = mutableSizesForClassNames;
     
     [self updateTableDataForSearchFilter];
 }
@@ -99,19 +104,27 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     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];
+        title = [title stringByAppendingFormat:@" (%lu, %@)", (unsigned long)totalCount,
+              [NSByteCountFormatter stringFromByteCount:totalSize countStyle:NSByteCountFormatterCountStyleFile]];
     } else {
-        title = [title stringByAppendingFormat:@" (filtered, %lu)", (unsigned long)filteredCount];
+        title = [title stringByAppendingFormat:@" (filtered, %lu, %@)", (unsigned long)filteredCount,
+              [NSByteCountFormatter stringFromByteCount:filteredSize countStyle:NSByteCountFormatterCountStyleFile]];
     }
     
     self.title = title;
@@ -125,6 +138,11 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     [self updateTableDataForSearchFilter];
 }
 
+- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
+{
+    [searchBar resignFirstResponder];
+}
+
 - (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope
 {
     [self updateTableDataForSearchFilter];
@@ -149,11 +167,20 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
         self.filteredClassNames = [self.filteredClassNames sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
     } else if (self.searchBar.selectedScopeButtonIndex == 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 (self.searchBar.selectedScopeButtonIndex == 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];
@@ -184,8 +211,11 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
     }
     
     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.textLabel.text = [NSString stringWithFormat:@"%@ (%ld, %@)", className, (long)[count integerValue],
+        [NSByteCountFormatter stringFromByteCount:totalSize countStyle:NSByteCountFormatterCountStyleFile]];
     
     return cell;
 }
@@ -195,7 +225,7 @@ static const NSInteger kFLEXLiveObjectsSortByCountIndex = 1;
 
 - (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

@@ -35,7 +35,7 @@
     self = [self initWithNibName:nil bundle:nil];
     if (self) {
         self.originalText = text;
-        NSString *htmlString = [NSString stringWithFormat:@"<pre>%@</pre>", [FLEXUtility stringByEscapingHTMLEntitiesInString:text]];
+        NSString *htmlString = [NSString stringWithFormat:@"<head><meta name='viewport' content='initial-scale=1.0'></head><body><pre>%@</pre></body>", [FLEXUtility stringByEscapingHTMLEntitiesInString:text]];
         [self.webView loadHTMLString:htmlString baseURL:nil];
     }
     return self;
@@ -51,6 +51,14 @@
     return self;
 }
 
+- (void)dealloc
+{
+    // UIWebView's delegate is assign so we need to clear it manually.
+    if (_webView.delegate == self) {
+        _webView.delegate = nil;
+    }
+}
+
 - (void)viewDidLoad
 {
     [super viewDidLoad];
@@ -82,6 +90,7 @@
         // 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.
         FLEXWebViewController *webVC = [[[self class] alloc] initWithURL:[request URL]];
+        webVC.title = [[request URL] absoluteString];
         [self.navigationController pushViewController:webVC animated:YES];
     }
     return shouldStart;
@@ -93,23 +102,23 @@
 + (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 *> *pathExtenstions = 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"]];
+        pathExtenstions = [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;

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogMessage.h

@@ -0,0 +1,21 @@
+//
+//  FLEXSystemLogMessage.h
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/25/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <asl.h>
+
+@interface FLEXSystemLogMessage : NSObject
+
++ (instancetype)logMessageFromASLMessage:(aslmsg)aslMessage;
+
+@property (nonatomic, strong) NSDate *date;
+@property (nonatomic, copy) NSString *sender;
+@property (nonatomic, copy) NSString *messageText;
+@property (nonatomic, assign) long long messageID;
+
+@end

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogMessage.m

@@ -0,0 +1,55 @@
+//
+//  FLEXSystemLogMessage.m
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/25/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import "FLEXSystemLogMessage.h"
+
+@implementation FLEXSystemLogMessage
+
++ (instancetype)logMessageFromASLMessage:(aslmsg)aslMessage
+{
+    FLEXSystemLogMessage *logMessage = [[FLEXSystemLogMessage alloc] init];
+
+    const char *timestamp = asl_get(aslMessage, ASL_KEY_TIME);
+    if (timestamp) {
+        NSTimeInterval timeInterval = [@(timestamp) integerValue];
+        const char *nanoseconds = asl_get(aslMessage, ASL_KEY_TIME_NSEC);
+        if (nanoseconds) {
+            timeInterval += [@(nanoseconds) doubleValue] / NSEC_PER_SEC;
+        }
+        logMessage.date = [NSDate dateWithTimeIntervalSince1970:timeInterval];
+    }
+
+    const char *sender = asl_get(aslMessage, ASL_KEY_SENDER);
+    if (sender) {
+        logMessage.sender = @(sender);
+    }
+
+    const char *messageText = asl_get(aslMessage, ASL_KEY_MSG);
+    if (messageText) {
+        logMessage.messageText = @(messageText);
+    }
+
+    const char *messageID = asl_get(aslMessage, ASL_KEY_MSG_ID);
+    if (messageID) {
+        logMessage.messageID = [@(messageID) longLongValue];
+    }
+
+    return logMessage;
+}
+
+- (BOOL)isEqual:(id)object
+{
+    return [object isKindOfClass:[FLEXSystemLogMessage class]] && self.messageID == [object messageID];
+}
+
+- (NSUInteger)hash
+{
+    return (NSUInteger)self.messageID;
+}
+
+@end

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogTableViewCell.h

@@ -0,0 +1,23 @@
+//
+//  FLEXSystemLogTableViewCell.h
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/25/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class FLEXSystemLogMessage;
+
+extern NSString *const kFLEXSystemLogTableViewCellIdentifier;
+
+@interface FLEXSystemLogTableViewCell : UITableViewCell
+
+@property (nonatomic, strong) FLEXSystemLogMessage *logMessage;
+@property (nonatomic, copy) NSString *highlightedText;
+
++ (NSString *)displayedTextForLogMessage:(FLEXSystemLogMessage *)logMessage;
++ (CGFloat)preferredHeightForLogMessage:(FLEXSystemLogMessage *)logMessage inWidth:(CGFloat)width;
+
+@end

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogTableViewCell.m

@@ -0,0 +1,128 @@
+//
+//  FLEXSystemLogTableViewCell.m
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/25/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import "FLEXSystemLogTableViewCell.h"
+#import "FLEXSystemLogMessage.h"
+
+NSString *const kFLEXSystemLogTableViewCellIdentifier = @"FLEXSystemLogTableViewCellIdentifier";
+
+@interface FLEXSystemLogTableViewCell ()
+
+@property (nonatomic, strong) UILabel *logMessageLabel;
+@property (nonatomic, strong) NSAttributedString *logMessageAttributedText;
+
+@end
+
+@implementation FLEXSystemLogTableViewCell
+
+- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
+{
+    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
+    if (self) {
+        self.logMessageLabel = [[UILabel alloc] init];
+        self.logMessageLabel.numberOfLines = 0;
+        self.separatorInset = UIEdgeInsetsZero;
+        self.selectionStyle = UITableViewCellSelectionStyleNone;
+        [self.contentView addSubview:self.logMessageLabel];
+    }
+    return self;
+}
+
+- (void)setLogMessage:(FLEXSystemLogMessage *)logMessage
+{
+    if (![_logMessage isEqual:logMessage]) {
+        _logMessage = logMessage;
+        self.logMessageAttributedText = nil;
+        [self setNeedsLayout];
+    }
+}
+
+- (void)setHighlightedText:(NSString *)highlightedText
+{
+    if (![_highlightedText isEqual:highlightedText]) {
+        _highlightedText = highlightedText;
+        self.logMessageAttributedText = nil;
+        [self setNeedsLayout];
+    }
+}
+
+- (NSAttributedString *)logMessageAttributedText
+{
+    if (!_logMessageAttributedText) {
+        _logMessageAttributedText = [[self class] attributedTextForLogMessage:self.logMessage highlightedText:self.highlightedText];
+    }
+    return _logMessageAttributedText;
+}
+
+static const UIEdgeInsets kFLEXLogMessageCellInsets = {10.0, 10.0, 10.0, 10.0};
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+
+    self.logMessageLabel.attributedText = self.logMessageAttributedText;
+    self.logMessageLabel.frame = UIEdgeInsetsInsetRect(self.contentView.bounds, kFLEXLogMessageCellInsets);
+}
+
+#pragma mark - Stateless helpers
+
++ (NSAttributedString *)attributedTextForLogMessage:(FLEXSystemLogMessage *)logMessage highlightedText:(NSString *)highlightedText
+{
+    NSString *text = [self displayedTextForLogMessage:logMessage];
+    NSDictionary<NSString *, id> *attributes = @{ NSFontAttributeName : [UIFont fontWithName:@"CourierNewPSMT" size:12.0] };
+    NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:attributes];
+
+    if ([highlightedText length] > 0) {
+        NSMutableAttributedString *mutableAttributedText = [attributedText mutableCopy];
+        NSMutableDictionary<NSString *, id> *highlightAttributes = [@{ NSBackgroundColorAttributeName : [UIColor yellowColor] } mutableCopy];
+        [highlightAttributes addEntriesFromDictionary:attributes];
+        
+        NSRange remainingSearchRange = NSMakeRange(0, text.length);
+        while (remainingSearchRange.location < text.length) {
+            remainingSearchRange.length = text.length - remainingSearchRange.location;
+            NSRange foundRange = [text rangeOfString:highlightedText options:NSCaseInsensitiveSearch range:remainingSearchRange];
+            if (foundRange.location != NSNotFound) {
+                remainingSearchRange.location = foundRange.location + foundRange.length;
+                [mutableAttributedText setAttributes:highlightAttributes range:foundRange];
+            } else {
+                break;
+            }
+        }
+        attributedText = mutableAttributedText;
+    }
+
+    return attributedText;
+}
+
++ (NSString *)displayedTextForLogMessage:(FLEXSystemLogMessage *)logMessage
+{
+    return [NSString stringWithFormat:@"%@: %@", [self logTimeStringFromDate:logMessage.date], logMessage.messageText];
+}
+
++ (CGFloat)preferredHeightForLogMessage:(FLEXSystemLogMessage *)logMessage inWidth:(CGFloat)width
+{
+    UIEdgeInsets insets = kFLEXLogMessageCellInsets;
+    CGFloat availableWidth = width - insets.left - insets.right;
+    NSAttributedString *attributedLogText = [self attributedTextForLogMessage:logMessage highlightedText:nil];
+    CGSize labelSize = [attributedLogText boundingRectWithSize:CGSizeMake(availableWidth, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading context:nil].size;
+    return labelSize.height + insets.top + insets.bottom;
+}
+
++ (NSString *)logTimeStringFromDate:(NSDate *)date
+{
+    static NSDateFormatter *formatter = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        formatter = [[NSDateFormatter alloc] init];
+        formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss.SSS";
+    });
+
+    return [formatter stringFromDate:date];
+}
+
+@end

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogTableViewController.h

@@ -0,0 +1,13 @@
+//
+//  FLEXSystemLogTableViewController.h
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/19/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXSystemLogTableViewController : UITableViewController
+
+@end

Classes/GlobalStateExplorers/SystemLog/FLEXSystemLogTableViewController.m

@@ -0,0 +1,237 @@
+//
+//  FLEXSystemLogTableViewController.m
+//  UICatalog
+//
+//  Created by Ryan Olson on 1/19/15.
+//  Copyright (c) 2015 f. All rights reserved.
+//
+
+#import "FLEXSystemLogTableViewController.h"
+#import "FLEXUtility.h"
+#import "FLEXSystemLogMessage.h"
+#import "FLEXSystemLogTableViewCell.h"
+#import <asl.h>
+
+@interface FLEXSystemLogTableViewController () <UISearchResultsUpdating, UISearchControllerDelegate>
+
+@property (nonatomic, strong) UISearchController *searchController;
+@property (nonatomic, readonly) NSMutableArray<FLEXSystemLogMessage *> *logMessages;
+@property (nonatomic, copy) NSArray<FLEXSystemLogMessage *> *filteredLogMessages;
+@property (nonatomic, strong) NSTimer *logUpdateTimer;
+@property (nonatomic, readonly) NSMutableIndexSet *logMessageIdentifiers;
+
+@end
+
+@implementation FLEXSystemLogTableViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    _logMessages = [NSMutableArray array];
+    _logMessageIdentifiers = [NSMutableIndexSet indexSet];
+
+    [self.tableView registerClass:[FLEXSystemLogTableViewCell class] forCellReuseIdentifier:kFLEXSystemLogTableViewCellIdentifier];
+    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    self.title = @"Loading...";
+    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@" ⬇︎ " style:UIBarButtonItemStylePlain target:self action:@selector(scrollToLastRow)];
+
+    self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
+    self.searchController.delegate = self;
+    self.searchController.searchResultsUpdater = self;
+    self.searchController.dimsBackgroundDuringPresentation = NO;
+    self.tableView.tableHeaderView = self.searchController.searchBar;
+
+    [self updateLogMessages];
+}
+
+- (void)viewWillAppear:(BOOL)animated
+{
+    [super viewWillAppear:animated];
+
+    NSTimeInterval updateInterval = 1.0;
+
+#if TARGET_IPHONE_SIMULATOR
+    // Querrying the ASL is much slower in the simulator. We need a longer polling interval to keep things repsonsive.
+    updateInterval = 5.0;
+#endif
+
+    self.logUpdateTimer = [NSTimer scheduledTimerWithTimeInterval:updateInterval target:self selector:@selector(updateLogMessages) userInfo:nil repeats:YES];
+}
+
+- (void)viewWillDisappear:(BOOL)animated
+{
+    [super viewWillDisappear:animated];
+
+    [self.logUpdateTimer invalidate];
+}
+
+- (void)updateLogMessages
+{
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSArray<FLEXSystemLogMessage *> *newMessages = [self newLogMessagesForCurrentProcess];
+        if (!newMessages.count) {
+            return;
+        }
+
+        dispatch_async(dispatch_get_main_queue(), ^{
+            self.title = @"System Log";
+
+            [self.logMessages addObjectsFromArray:newMessages];
+            for (FLEXSystemLogMessage *message in newMessages) {
+                [self.logMessageIdentifiers addIndex:(NSUInteger)message.messageID];
+            }
+
+            // "Follow" the log as new messages stream in if we were previously near the bottom.
+            BOOL wasNearBottom = self.tableView.contentOffset.y >= self.tableView.contentSize.height - self.tableView.frame.size.height - 100.0;
+            [self.tableView reloadData];
+            if (wasNearBottom) {
+                [self scrollToLastRow];
+            }
+        });
+    });
+}
+
+- (void)scrollToLastRow
+{
+    NSInteger numberOfRows = [self.tableView numberOfRowsInSection:0];
+    if (numberOfRows > 0) {
+        NSIndexPath *lastIndexPath = [NSIndexPath indexPathForRow:numberOfRows - 1 inSection:0];
+        [self.tableView scrollToRowAtIndexPath:lastIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
+    }
+}
+
+#pragma mark - Table view data source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    return 1;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.searchController.isActive ? [self.filteredLogMessages count] : [self.logMessages count];
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
+{
+    FLEXSystemLogTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXSystemLogTableViewCellIdentifier forIndexPath:indexPath];
+    cell.logMessage = [self logMessageAtIndexPath:indexPath];
+    cell.highlightedText = self.searchController.searchBar.text;
+    
+    if (indexPath.row % 2 == 0) {
+        cell.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
+    } else {
+        cell.backgroundColor = [UIColor whiteColor];
+    }
+    
+    return cell;
+}
+
+- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXSystemLogMessage *logMessage = [self logMessageAtIndexPath:indexPath];
+    return [FLEXSystemLogTableViewCell preferredHeightForLogMessage:logMessage inWidth:self.tableView.bounds.size.width];
+}
+
+#pragma mark - Copy on long press
+
+- (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(copy:);
+}
+
+- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
+{
+    if (action == @selector(copy:)) {
+        FLEXSystemLogMessage *logMessage = [self logMessageAtIndexPath:indexPath];
+        NSString *stringToCopy = [FLEXSystemLogTableViewCell displayedTextForLogMessage:logMessage] ?: @"";
+        [[UIPasteboard generalPasteboard] setString:stringToCopy];
+    }
+}
+
+- (FLEXSystemLogMessage *)logMessageAtIndexPath:(NSIndexPath *)indexPath
+{
+    return self.searchController.isActive ? self.filteredLogMessages[indexPath.row] : self.logMessages[indexPath.row];
+}
+
+#pragma mark - UISearchResultsUpdating
+
+- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
+{
+    NSString *searchString = searchController.searchBar.text;
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSArray<FLEXSystemLogMessage *> *filteredLogMessages = [self.logMessages filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(FLEXSystemLogMessage *logMessage, NSDictionary<NSString *, id> *bindings) {
+            NSString *displayedText = [FLEXSystemLogTableViewCell displayedTextForLogMessage:logMessage];
+            return [displayedText rangeOfString:searchString options:NSCaseInsensitiveSearch].length > 0;
+        }]];
+        dispatch_async(dispatch_get_main_queue(), ^{
+            if ([searchController.searchBar.text isEqual:searchString]) {
+                self.filteredLogMessages = filteredLogMessages;
+                [self.tableView reloadData];
+            }
+        });
+    });
+}
+
+#pragma mark - Log Message Fetching
+
+- (NSArray<FLEXSystemLogMessage *> *)newLogMessagesForCurrentProcess
+{
+    if (!self.logMessages.count) {
+        return [[self class] allLogMessagesForCurrentProcess];
+    }
+
+    aslresponse response = [FLEXSystemLogTableViewController ASLMessageListForCurrentProcess];
+    aslmsg aslMessage = NULL;
+
+    NSMutableArray<FLEXSystemLogMessage *> *newMessages = [NSMutableArray array];
+
+    while ((aslMessage = asl_next(response))) {
+        NSUInteger messageID = (NSUInteger)atoll(asl_get(aslMessage, ASL_KEY_MSG_ID));
+        if (![self.logMessageIdentifiers containsIndex:messageID]) {
+            [newMessages addObject:[FLEXSystemLogMessage logMessageFromASLMessage:aslMessage]];
+        }
+    }
+
+    asl_release(response);
+    return newMessages;
+}
+
++ (aslresponse)ASLMessageListForCurrentProcess
+{
+    static NSString *pidString = nil;
+    if (!pidString) {
+        pidString = @([[NSProcessInfo processInfo] processIdentifier]).stringValue;
+    }
+
+    // Create system log query object.
+    asl_object_t query = asl_new(ASL_TYPE_QUERY);
+
+    // Filter for messages from the current process.
+    // Note that this appears to happen by default on device, but is required in the simulator.
+    asl_set_query(query, ASL_KEY_PID, pidString.UTF8String, ASL_QUERY_OP_EQUAL);
+
+    return asl_search(NULL, query);
+}
+
++ (NSArray<FLEXSystemLogMessage *> *)allLogMessagesForCurrentProcess
+{
+    aslresponse response = [self ASLMessageListForCurrentProcess];
+    aslmsg aslMessage = NULL;
+
+    NSMutableArray<FLEXSystemLogMessage *> *logMessages = [NSMutableArray array];
+    while ((aslMessage = asl_next(response))) {
+        [logMessages addObject:[FLEXSystemLogMessage logMessageFromASLMessage:aslMessage]];
+    }
+    asl_release(response);
+
+    return logMessages;
+}
+
+@end

Classes/Info.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

Classes/Manager/FLEXManager+Private.h

@@ -8,9 +8,11 @@
 
 #import "FLEXManager.h"
 
+@class FLEXGlobalsTableViewControllerEntry;
+
 @interface FLEXManager ()
 
 /// An array of FLEXGlobalsTableViewControllerEntry objects that have been registered by the user.
-@property (nonatomic, readonly, strong) NSArray *userGlobalEntries;
+@property (nonatomic, readonly, strong) NSArray<FLEXGlobalsTableViewControllerEntry *> *userGlobalEntries;
 
 @end

Classes/Manager/FLEXManager.m

@@ -0,0 +1,370 @@
+//
+//  FLEXManager.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 4/4/14.
+//  Copyright (c) 2014 Flipboard. All rights reserved.
+//
+
+#import "FLEXManager.h"
+#import "FLEXExplorerViewController.h"
+#import "FLEXWindow.h"
+#import "FLEXGlobalsTableViewControllerEntry.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXObjectExplorerViewController.h"
+#import "FLEXNetworkObserver.h"
+#import "FLEXNetworkRecorder.h"
+#import "FLEXKeyboardShortcutManager.h"
+#import "FLEXFileBrowserTableViewController.h"
+#import "FLEXNetworkHistoryTableViewController.h"
+#import "FLEXKeyboardHelpViewController.h"
+
+@interface FLEXManager () <FLEXWindowEventDelegate, FLEXExplorerViewControllerDelegate>
+
+@property (nonatomic, strong) FLEXWindow *explorerWindow;
+@property (nonatomic, strong) FLEXExplorerViewController *explorerViewController;
+
+@property (nonatomic, readonly, strong) NSMutableArray<FLEXGlobalsTableViewControllerEntry *> *userGlobalEntries;
+
+@end
+
+@implementation FLEXManager
+
++ (instancetype)sharedManager
+{
+    static FLEXManager *sharedManager = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sharedManager = [[[self class] alloc] init];
+    });
+    return sharedManager;
+}
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self) {
+        _userGlobalEntries = [NSMutableArray array];
+    }
+    return self;
+}
+
+- (FLEXWindow *)explorerWindow
+{
+    NSAssert([NSThread isMainThread], @"You must use %@ from the main thread only.", NSStringFromClass([self class]));
+    
+    if (!_explorerWindow) {
+        _explorerWindow = [[FLEXWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+        _explorerWindow.eventDelegate = self;
+        _explorerWindow.rootViewController = self.explorerViewController;
+    }
+    
+    return _explorerWindow;
+}
+
+- (FLEXExplorerViewController *)explorerViewController
+{
+    if (!_explorerViewController) {
+        _explorerViewController = [[FLEXExplorerViewController alloc] init];
+        _explorerViewController.delegate = self;
+    }
+
+    return _explorerViewController;
+}
+
+- (void)showExplorer
+{
+    self.explorerWindow.hidden = NO;
+}
+
+- (void)hideExplorer
+{
+    self.explorerWindow.hidden = YES;
+}
+
+- (void)toggleExplorer {
+    if (self.explorerWindow.isHidden) {
+        [self showExplorer];
+    } else {
+        [self hideExplorer];
+    }
+}
+
+- (BOOL)isHidden
+{
+    return self.explorerWindow.isHidden;
+}
+
+- (BOOL)isNetworkDebuggingEnabled
+{
+    return [FLEXNetworkObserver isEnabled];
+}
+
+- (void)setNetworkDebuggingEnabled:(BOOL)networkDebuggingEnabled
+{
+    [FLEXNetworkObserver setEnabled:networkDebuggingEnabled];
+}
+
+- (NSUInteger)networkResponseCacheByteLimit
+{
+    return [[FLEXNetworkRecorder defaultRecorder] responseCacheByteLimit];
+}
+
+- (void)setNetworkResponseCacheByteLimit:(NSUInteger)networkResponseCacheByteLimit
+{
+    [[FLEXNetworkRecorder defaultRecorder] setResponseCacheByteLimit:networkResponseCacheByteLimit];
+}
+
+- (void)setNetworkRequestHostBlacklist:(NSArray<NSString *> *)networkRequestHostBlacklist
+{
+    [FLEXNetworkRecorder defaultRecorder].hostBlacklist = networkRequestHostBlacklist;
+}
+
+- (NSArray<NSString *> *)hostBlacklist
+{
+    return [FLEXNetworkRecorder defaultRecorder].hostBlacklist;
+}
+
+#pragma mark - FLEXWindowEventDelegate
+
+- (BOOL)shouldHandleTouchAtPoint:(CGPoint)pointInWindow
+{
+    // Ask the explorer view controller
+    return [self.explorerViewController shouldReceiveTouchAtWindowPoint:pointInWindow];
+}
+
+- (BOOL)canBecomeKeyWindow
+{
+    // Only when the explorer view controller wants it because it needs to accept key input & affect the status bar.
+    return [self.explorerViewController wantsWindowToBecomeKey];
+}
+
+
+#pragma mark - FLEXExplorerViewControllerDelegate
+
+- (void)explorerViewControllerDidFinish:(FLEXExplorerViewController *)explorerViewController
+{
+    [self hideExplorer];
+}
+
+#pragma mark - Simulator Shortcuts
+
+- (void)registerSimulatorShortcutWithKey:(NSString *)key modifiers:(UIKeyModifierFlags)modifiers action:(dispatch_block_t)action description:(NSString *)description
+{
+# if TARGET_OS_SIMULATOR
+    [[FLEXKeyboardShortcutManager sharedManager] registerSimulatorShortcutWithKey:key modifiers:modifiers action:action description:description];
+#endif
+}
+
+- (void)setSimulatorShortcutsEnabled:(BOOL)simulatorShortcutsEnabled
+{
+# if TARGET_OS_SIMULATOR
+    [[FLEXKeyboardShortcutManager sharedManager] setEnabled:simulatorShortcutsEnabled];
+#endif
+}
+
+- (BOOL)simulatorShortcutsEnabled
+{
+# if TARGET_OS_SIMULATOR
+    return [[FLEXKeyboardShortcutManager sharedManager] isEnabled];
+#else
+    return NO;
+#endif
+}
+
+- (void)registerDefaultSimulatorShortcuts
+{
+    [self registerSimulatorShortcutWithKey:@"f" modifiers:0 action:^{
+        [self toggleExplorer];
+    } description:@"Toggle FLEX toolbar"];
+    
+    [self registerSimulatorShortcutWithKey:@"g" modifiers:0 action:^{
+        [self showExplorerIfNeeded];
+        [self.explorerViewController toggleMenuTool];
+    } description:@"Toggle FLEX globals menu"];
+    
+    [self registerSimulatorShortcutWithKey:@"v" modifiers:0 action:^{
+        [self showExplorerIfNeeded];
+        [self.explorerViewController toggleViewsTool];
+    } description:@"Toggle view hierarchy menu"];
+    
+    [self registerSimulatorShortcutWithKey:@"s" modifiers:0 action:^{
+        [self showExplorerIfNeeded];
+        [self.explorerViewController toggleSelectTool];
+    } description:@"Toggle select tool"];
+    
+    [self registerSimulatorShortcutWithKey:@"m" modifiers:0 action:^{
+        [self showExplorerIfNeeded];
+        [self.explorerViewController toggleMoveTool];
+    } description:@"Toggle move tool"];
+    
+    [self registerSimulatorShortcutWithKey:@"n" modifiers:0 action:^{
+        [self toggleTopViewControllerOfClass:[FLEXNetworkHistoryTableViewController class]];
+    } description:@"Toggle network history view"];
+    
+    [self registerSimulatorShortcutWithKey:UIKeyInputDownArrow modifiers:0 action:^{
+        if ([self isHidden]) {
+            [self tryScrollDown];
+        } else {
+            [self.explorerViewController handleDownArrowKeyPressed];
+        }
+    } description:@"Cycle view selection\n\t\tMove view down\n\t\tScroll down"];
+    
+    [self registerSimulatorShortcutWithKey:UIKeyInputUpArrow modifiers:0 action:^{
+        if ([self isHidden]) {
+            [self tryScrollUp];
+        } else {
+            [self.explorerViewController handleUpArrowKeyPressed];
+        }
+    } description:@"Cycle view selection\n\t\tMove view up\n\t\tScroll up"];
+    
+    [self registerSimulatorShortcutWithKey:UIKeyInputRightArrow modifiers:0 action:^{
+        if (![self isHidden]) {
+            [self.explorerViewController handleRightArrowKeyPressed];
+        }
+    } description:@"Move selected view right"];
+    
+    [self registerSimulatorShortcutWithKey:UIKeyInputLeftArrow modifiers:0 action:^{
+        if ([self isHidden]) {
+            [self tryGoBack];
+        } else {
+            [self.explorerViewController handleLeftArrowKeyPressed];
+        }
+    } description:@"Move selected view left"];
+    
+    [self registerSimulatorShortcutWithKey:@"?" modifiers:0 action:^{
+        [self toggleTopViewControllerOfClass:[FLEXKeyboardHelpViewController class]];
+    } description:@"Toggle (this) help menu"];
+    
+    [self registerSimulatorShortcutWithKey:UIKeyInputEscape modifiers:0 action:^{
+        [[[self topViewController] presentingViewController] dismissViewControllerAnimated:YES completion:nil];
+    } description:@"End editing text\n\t\tDismiss top view controller"];
+    
+    [self registerSimulatorShortcutWithKey:@"o" modifiers:UIKeyModifierCommand|UIKeyModifierShift action:^{
+        [self toggleTopViewControllerOfClass:[FLEXFileBrowserTableViewController class]];
+    } description:@"Toggle file browser menu"];
+}
+
++ (void)load
+{
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [[[self class] sharedManager] registerDefaultSimulatorShortcuts];
+    });
+}
+
+#pragma mark - Extensions
+
+- (void)registerGlobalEntryWithName:(NSString *)entryName objectFutureBlock:(id (^)(void))objectFutureBlock
+{
+    NSParameterAssert(entryName);
+    NSParameterAssert(objectFutureBlock);
+    NSAssert([NSThread isMainThread], @"This method must be called from the main thread.");
+
+    entryName = entryName.copy;
+    FLEXGlobalsTableViewControllerEntry *entry = [FLEXGlobalsTableViewControllerEntry entryWithNameFuture:^NSString *{
+        return entryName;
+    } viewControllerFuture:^UIViewController *{
+        return [FLEXObjectExplorerFactory explorerViewControllerForObject:objectFutureBlock()];
+    }];
+
+    [self.userGlobalEntries addObject:entry];
+}
+
+- (void)registerGlobalEntryWithName:(NSString *)entryName viewControllerFutureBlock:(UIViewController * (^)(void))viewControllerFutureBlock
+{
+    NSParameterAssert(entryName);
+    NSParameterAssert(viewControllerFutureBlock);
+    NSAssert([NSThread isMainThread], @"This method must be called from the main thread.");
+
+    entryName = entryName.copy;
+    FLEXGlobalsTableViewControllerEntry *entry = [FLEXGlobalsTableViewControllerEntry entryWithNameFuture:^NSString *{
+        return entryName;
+    } viewControllerFuture:^UIViewController *{
+        UIViewController *viewController = viewControllerFutureBlock();
+        NSCAssert(viewController, @"'%@' entry returned nil viewController. viewControllerFutureBlock should never return nil.", entryName);
+        return viewController;
+    }];
+
+    [self.userGlobalEntries addObject:entry];
+}
+
+- (void)tryScrollDown
+{
+    UIScrollView *firstScrollView = [self firstScrollView];
+    CGPoint contentOffset = [firstScrollView contentOffset];
+    CGFloat distance = floor(firstScrollView.frame.size.height / 2.0);
+    CGFloat maxContentOffsetY = firstScrollView.contentSize.height + firstScrollView.contentInset.bottom - firstScrollView.frame.size.height;
+    distance = MIN(maxContentOffsetY - firstScrollView.contentOffset.y, distance);
+    contentOffset.y += distance;
+    [firstScrollView setContentOffset:contentOffset animated:YES];
+}
+
+- (void)tryScrollUp
+{
+    UIScrollView *firstScrollView = [self firstScrollView];
+    CGPoint contentOffset = [firstScrollView contentOffset];
+    CGFloat distance = floor(firstScrollView.frame.size.height / 2.0);
+    CGFloat minContentOffsetY = -firstScrollView.contentInset.top;
+    distance = MIN(firstScrollView.contentOffset.y - minContentOffsetY, distance);
+    contentOffset.y -= distance;
+    [firstScrollView setContentOffset:contentOffset animated:YES];
+}
+
+- (UIScrollView *)firstScrollView
+{
+    NSMutableArray<UIView *> *views = [[[[UIApplication sharedApplication] keyWindow] subviews] mutableCopy];
+    UIScrollView *scrollView = nil;
+    while ([views count] > 0) {
+        UIView *view = [views firstObject];
+        [views removeObjectAtIndex:0];
+        if ([view isKindOfClass:[UIScrollView class]]) {
+            scrollView = (UIScrollView *)view;
+            break;
+        } else {
+            [views addObjectsFromArray:[view subviews]];
+        }
+    }
+    return scrollView;
+}
+
+- (void)tryGoBack
+{
+    UINavigationController *navigationController = nil;
+    UIViewController *topViewController = [self topViewController];
+    if ([topViewController isKindOfClass:[UINavigationController class]]) {
+        navigationController = (UINavigationController *)topViewController;
+    } else {
+        navigationController = topViewController.navigationController;
+    }
+    [navigationController popViewControllerAnimated:YES];
+}
+
+- (UIViewController *)topViewController
+{
+    UIViewController *topViewController = [[[UIApplication sharedApplication] keyWindow] rootViewController];
+    while ([topViewController presentedViewController]) {
+        topViewController = [topViewController presentedViewController];
+    }
+    return topViewController;
+}
+
+- (void)toggleTopViewControllerOfClass:(Class)class
+{
+    UIViewController *topViewController = [self topViewController];
+    if ([topViewController isKindOfClass:[UINavigationController class]] && [[[(UINavigationController *)topViewController viewControllers] firstObject] isKindOfClass:[class class]]) {
+        [[topViewController presentingViewController] dismissViewControllerAnimated:YES completion:nil];
+    } else {
+        id viewController = [[class alloc] init];
+        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
+        [topViewController presentViewController:navigationController animated:YES completion:nil];
+    }
+}
+
+- (void)showExplorerIfNeeded
+{
+    if ([self isHidden]) {
+        [self showExplorer];
+    }
+}
+
+@end

Classes/Network/FLEXNetworkCurlLogger.h

@@ -0,0 +1,19 @@
+//
+// FLEXCurlLogger.h
+//
+//
+// Created by Ji Pei on 07/27/16
+//
+
+#import <Foundation/Foundation.h>
+
+@interface FLEXNetworkCurlLogger : NSObject
+
+/**
+ * Generates a cURL command equivalent to the given request.
+ *
+ * @param request The request to be translated
+ */
++ (NSString *)curlCommandString:(NSURLRequest *)request;
+
+@end

Classes/Network/FLEXNetworkCurlLogger.m

@@ -0,0 +1,42 @@
+//
+// FLEXCurlLogger.m
+//
+//
+// Created by Ji Pei on 07/27/16
+//
+
+#import "FLEXNetworkCurlLogger.h"
+
+@implementation FLEXNetworkCurlLogger
+
++ (NSString *)curlCommandString:(NSURLRequest *)request {
+    __block NSMutableString *curlCommandString = [NSMutableString stringWithFormat:@"curl -v -X %@ ", request.HTTPMethod];
+
+    [curlCommandString appendFormat:@"\'%@\' ", request.URL.absoluteString];
+
+    [request.allHTTPHeaderFields enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *val, BOOL *stop) {
+        [curlCommandString appendFormat:@"-H \'%@: %@\' ", key, val];
+    }];
+
+    NSArray<NSHTTPCookie *> *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:request.URL];
+    if (cookies) {
+        [curlCommandString appendFormat:@"-H \'Cookie:"];
+        for (NSHTTPCookie *cookie in cookies) {
+            [curlCommandString appendFormat:@" %@=%@;", cookie.name, cookie.value];
+        }
+        [curlCommandString appendFormat:@"\' "];
+    }
+
+    if (request.HTTPBody) {
+        if ([request.allHTTPHeaderFields[@"Content-Length"] intValue] < 1024) {
+            [curlCommandString appendFormat:@"-d \'%@\'",
+             [[NSString alloc] initWithData:request.HTTPBody encoding:NSUTF8StringEncoding]];
+        } else {
+            [curlCommandString appendFormat:@"[TOO MUCH DATA TO INCLUDE]"];
+        }
+    }
+
+    return curlCommandString;
+}
+
+@end

Classes/Network/FLEXNetworkHistoryTableViewController.h

@@ -0,0 +1,13 @@
+//
+//  FLEXNetworkHistoryTableViewController.h
+//  Flipboard
+//
+//  Created by Ryan Olson on 2/8/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLEXNetworkHistoryTableViewController : UITableViewController
+
+@end

Classes/Network/FLEXNetworkHistoryTableViewController.m

@@ -0,0 +1,364 @@
+//
+//  FLEXNetworkHistoryTableViewController.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 2/8/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import "FLEXNetworkHistoryTableViewController.h"
+#import "FLEXNetworkTransaction.h"
+#import "FLEXNetworkTransactionTableViewCell.h"
+#import "FLEXNetworkRecorder.h"
+#import "FLEXNetworkTransactionDetailTableViewController.h"
+#import "FLEXNetworkObserver.h"
+#import "FLEXNetworkSettingsTableViewController.h"
+
+@interface FLEXNetworkHistoryTableViewController () <UISearchResultsUpdating, UISearchControllerDelegate>
+
+/// Backing model
+@property (nonatomic, copy) NSArray<FLEXNetworkTransaction *> *networkTransactions;
+@property (nonatomic, assign) long long bytesReceived;
+@property (nonatomic, copy) NSArray<FLEXNetworkTransaction *> *filteredNetworkTransactions;
+@property (nonatomic, assign) long long filteredBytesReceived;
+
+@property (nonatomic, assign) BOOL rowInsertInProgress;
+@property (nonatomic, assign) BOOL isPresentingSearch;
+
+@property (nonatomic, strong) UISearchController *searchController;
+
+@end
+
+@implementation FLEXNetworkHistoryTableViewController
+
+- (instancetype)initWithStyle:(UITableViewStyle)style
+{
+    self = [super initWithStyle:style];
+    if (self) {
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNewTransactionRecordedNotification:) name:kFLEXNetworkRecorderNewTransactionNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleTransactionUpdatedNotification:) name:kFLEXNetworkRecorderTransactionUpdatedNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleTransactionsClearedNotification:) name:kFLEXNetworkRecorderTransactionsClearedNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNetworkObserverEnabledStateChangedNotification:) name:kFLEXNetworkObserverEnabledStateChangedNotification object:nil];
+        self.title = @"📡  Network";
+        self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Settings" style:UIBarButtonItemStylePlain target:self action:@selector(settingsButtonTapped:)];
+
+        // Needed to avoid search bar showing over detail pages pushed on the nav stack
+        // see http://asciiwwdc.com/2014/sessions/228
+        self.definesPresentationContext = YES;
+    }
+    return self;
+}
+
+- (void)dealloc
+{
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    [self.tableView registerClass:[FLEXNetworkTransactionTableViewCell class] forCellReuseIdentifier:kFLEXNetworkTransactionCellIdentifier];
+    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    self.tableView.rowHeight = [FLEXNetworkTransactionTableViewCell preferredCellHeight];
+
+    self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
+    self.searchController.delegate = self;
+    self.searchController.searchResultsUpdater = self;
+    self.searchController.dimsBackgroundDuringPresentation = NO;
+    self.tableView.tableHeaderView = self.searchController.searchBar;
+
+    [self updateTransactions];
+}
+
+- (void)settingsButtonTapped:(id)sender
+{
+    FLEXNetworkSettingsTableViewController *settingsViewController = [[FLEXNetworkSettingsTableViewController alloc] init];
+    settingsViewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(settingsViewControllerDoneTapped:)];
+    settingsViewController.title = @"Network Debugging Settings";
+    UINavigationController *wrapperNavigationController = [[UINavigationController alloc] initWithRootViewController:settingsViewController];
+    [self presentViewController:wrapperNavigationController animated:YES completion:nil];
+}
+
+- (void)settingsViewControllerDoneTapped:(id)sender
+{
+    [self dismissViewControllerAnimated:YES completion:nil];
+}
+
+- (void)updateTransactions
+{
+    self.networkTransactions = [[FLEXNetworkRecorder defaultRecorder] networkTransactions];
+}
+
+- (void)setNetworkTransactions:(NSArray<FLEXNetworkTransaction *> *)networkTransactions
+{
+    if (![_networkTransactions isEqual:networkTransactions]) {
+        _networkTransactions = networkTransactions;
+        [self updateBytesReceived];
+        [self updateFilteredBytesReceived];
+    }
+}
+
+- (void)updateBytesReceived
+{
+    long long bytesReceived = 0;
+    for (FLEXNetworkTransaction *transaction in self.networkTransactions) {
+        bytesReceived += transaction.receivedDataLength;
+    }
+    self.bytesReceived = bytesReceived;
+    [self updateFirstSectionHeader];
+}
+
+- (void)setFilteredNetworkTransactions:(NSArray<FLEXNetworkTransaction *> *)filteredNetworkTransactions
+{
+    if (![_filteredNetworkTransactions isEqual:filteredNetworkTransactions]) {
+        _filteredNetworkTransactions = filteredNetworkTransactions;
+        [self updateFilteredBytesReceived];
+    }
+}
+
+- (void)updateFilteredBytesReceived
+{
+    long long filteredBytesReceived = 0;
+    for (FLEXNetworkTransaction *transaction in self.filteredNetworkTransactions) {
+        filteredBytesReceived += transaction.receivedDataLength;
+    }
+    self.filteredBytesReceived = filteredBytesReceived;
+    [self updateFirstSectionHeader];
+}
+
+- (void)updateFirstSectionHeader
+{
+    UIView *view = [self.tableView headerViewForSection:0];
+    if ([view isKindOfClass:[UITableViewHeaderFooterView class]]) {
+        UITableViewHeaderFooterView *headerView = (UITableViewHeaderFooterView *)view;
+        headerView.textLabel.text = [self headerText];
+        [headerView setNeedsLayout];
+    }
+}
+
+- (NSString *)headerText
+{
+    NSString *headerText = nil;
+    if ([FLEXNetworkObserver isEnabled]) {
+        long long bytesReceived = 0;
+        NSInteger totalRequests = 0;
+        if (self.searchController.isActive) {
+            bytesReceived = self.filteredBytesReceived;
+            totalRequests = [self.filteredNetworkTransactions count];
+        } else {
+            bytesReceived = self.bytesReceived;
+            totalRequests = [self.networkTransactions count];
+        }
+        NSString *byteCountText = [NSByteCountFormatter stringFromByteCount:bytesReceived countStyle:NSByteCountFormatterCountStyleBinary];
+        NSString *requestsText = totalRequests == 1 ? @"Request" : @"Requests";
+        headerText = [NSString stringWithFormat:@"%ld %@ (%@ received)", (long)totalRequests, requestsText, byteCountText];
+    } else {
+        headerText = @"⚠️  Debugging Disabled (Enable in Settings)";
+    }
+    return headerText;
+}
+
+#pragma mark - Notification Handlers
+
+- (void)handleNewTransactionRecordedNotification:(NSNotification *)notification
+{
+    [self tryUpdateTransactions];
+}
+
+- (void)tryUpdateTransactions
+{
+    // Let the previous row insert animation finish before starting a new one to avoid stomping.
+    // We'll try calling the method again when the insertion completes, and we properly no-op if there haven't been changes.
+    if (self.rowInsertInProgress) {
+        return;
+    }
+    
+    if (self.searchController.isActive) {
+        [self updateTransactions];
+        [self updateSearchResults];
+        return;
+    }
+
+    NSInteger existingRowCount = [self.networkTransactions count];
+    [self updateTransactions];
+    NSInteger newRowCount = [self.networkTransactions count];
+    NSInteger addedRowCount = newRowCount - existingRowCount;
+
+    if (addedRowCount != 0 && !self.isPresentingSearch) {
+        // Insert animation if we're at the top.
+        if (self.tableView.contentOffset.y <= 0.0 && addedRowCount > 0) {
+            [CATransaction begin];
+            
+            self.rowInsertInProgress = YES;
+            [CATransaction setCompletionBlock:^{
+                self.rowInsertInProgress = NO;
+                [self tryUpdateTransactions];
+            }];
+
+            NSMutableArray<NSIndexPath *> *indexPathsToReload = [NSMutableArray array];
+            for (NSInteger row = 0; row < addedRowCount; row++) {
+                [indexPathsToReload addObject:[NSIndexPath indexPathForRow:row inSection:0]];
+            }
+            [self.tableView insertRowsAtIndexPaths:indexPathsToReload withRowAnimation:UITableViewRowAnimationAutomatic];
+
+            [CATransaction commit];
+        } else {
+            // Maintain the user's position if they've scrolled down.
+            CGSize existingContentSize = self.tableView.contentSize;
+            [self.tableView reloadData];
+            CGFloat contentHeightChange = self.tableView.contentSize.height - existingContentSize.height;
+            self.tableView.contentOffset = CGPointMake(self.tableView.contentOffset.x, self.tableView.contentOffset.y + contentHeightChange);
+        }
+    }
+}
+
+- (void)handleTransactionUpdatedNotification:(NSNotification *)notification
+{
+    [self updateBytesReceived];
+    [self updateFilteredBytesReceived];
+
+    FLEXNetworkTransaction *transaction = notification.userInfo[kFLEXNetworkRecorderUserInfoTransactionKey];
+
+    // Update both the main table view and search table view if needed.
+    for (FLEXNetworkTransactionTableViewCell *cell in [self.tableView visibleCells]) {
+        if ([cell.transaction isEqual:transaction]) {
+            // Using -[UITableView reloadRowsAtIndexPaths:withRowAnimation:] is overkill here and kicks off a lot of
+            // work that can make the table view somewhat unresponseive when lots of updates are streaming in.
+            // We just need to tell the cell that it needs to re-layout.
+            [cell setNeedsLayout];
+            break;
+        }
+    }
+    [self updateFirstSectionHeader];
+}
+
+- (void)handleTransactionsClearedNotification:(NSNotification *)notification
+{
+    [self updateTransactions];
+    [self.tableView reloadData];
+}
+
+- (void)handleNetworkObserverEnabledStateChangedNotification:(NSNotification *)notification
+{
+    // Update the header, which displays a warning when network debugging is disabled
+    [self updateFirstSectionHeader];
+}
+
+#pragma mark - Table view data source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    return 1;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    return self.searchController.isActive ? [self.filteredNetworkTransactions count] : [self.networkTransactions count];
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    return [self headerText];
+}
+
+- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section
+{
+    if ([view isKindOfClass:[UITableViewHeaderFooterView class]]) {
+        UITableViewHeaderFooterView *headerView = (UITableViewHeaderFooterView *)view;
+        headerView.textLabel.font = [UIFont fontWithName:@"HelveticaNeue-Medium" size:14.0];
+        headerView.textLabel.textColor = [UIColor whiteColor];
+        headerView.contentView.backgroundColor = [UIColor colorWithWhite:0.5 alpha:1.0];
+    }
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXNetworkTransactionTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXNetworkTransactionCellIdentifier forIndexPath:indexPath];
+    cell.transaction = [self transactionAtIndexPath:indexPath inTableView:tableView];
+
+    // Since we insert from the top, assign background colors bottom up to keep them consistent for each transaction.
+    NSInteger totalRows = [tableView numberOfRowsInSection:indexPath.section];
+    if ((totalRows - indexPath.row) % 2 == 0) {
+        cell.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
+    } else {
+        cell.backgroundColor = [UIColor whiteColor];
+    }
+
+    return cell;
+}
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    FLEXNetworkTransactionDetailTableViewController *detailViewController = [[FLEXNetworkTransactionDetailTableViewController alloc] init];
+    detailViewController.transaction = [self transactionAtIndexPath:indexPath inTableView:tableView];
+    [self.navigationController pushViewController:detailViewController animated:YES];
+}
+
+#pragma mark - Menu Actions
+
+- (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(copy:);
+}
+
+- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
+{
+    if (action == @selector(copy:)) {
+        FLEXNetworkTransaction *transaction = [self transactionAtIndexPath:indexPath inTableView:tableView];
+        NSString *requestURLString = transaction.request.URL.absoluteString ?: @"";
+        [[UIPasteboard generalPasteboard] setString:requestURLString];
+    }
+}
+
+- (FLEXNetworkTransaction *)transactionAtIndexPath:(NSIndexPath *)indexPath inTableView:(UITableView *)tableView
+{
+    return self.searchController.isActive ? self.filteredNetworkTransactions[indexPath.row] : self.networkTransactions[indexPath.row];
+}
+
+#pragma mark - UISearchResultsUpdating
+
+- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
+{
+    [self updateSearchResults];
+}
+
+- (void)updateSearchResults
+{
+    NSString *searchString = self.searchController.searchBar.text;
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSArray<FLEXNetworkTransaction *> *filteredNetworkTransactions = [self.networkTransactions filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(FLEXNetworkTransaction *transaction, NSDictionary<NSString *, id> *bindings) {
+            return [[transaction.request.URL absoluteString] rangeOfString:searchString options:NSCaseInsensitiveSearch].length > 0;
+        }]];
+        dispatch_async(dispatch_get_main_queue(), ^{
+            if ([self.searchController.searchBar.text isEqual:searchString]) {
+                self.filteredNetworkTransactions = filteredNetworkTransactions;
+                [self.tableView reloadData];
+            }
+        });
+    });
+}
+
+#pragma mark - UISearchControllerDelegate
+
+- (void)willPresentSearchController:(UISearchController *)searchController
+{
+    self.isPresentingSearch = YES;
+}
+
+- (void)didPresentSearchController:(UISearchController *)searchController
+{
+    self.isPresentingSearch = NO;
+}
+
+- (void)willDismissSearchController:(UISearchController *)searchController
+{
+    [self.tableView reloadData];
+}
+
+@end

Classes/Network/FLEXNetworkRecorder.h

@@ -0,0 +1,66 @@
+//
+//  FLEXNetworkRecorder.h
+//  Flipboard
+//
+//  Created by Ryan Olson on 2/4/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+// Notifications posted when the record is updated
+extern NSString *const kFLEXNetworkRecorderNewTransactionNotification;
+extern NSString *const kFLEXNetworkRecorderTransactionUpdatedNotification;
+extern NSString *const kFLEXNetworkRecorderUserInfoTransactionKey;
+extern NSString *const kFLEXNetworkRecorderTransactionsClearedNotification;
+
+@class FLEXNetworkTransaction;
+
+@interface FLEXNetworkRecorder : NSObject
+
+/// In general, it only makes sense to have one recorder for the entire application.
++ (instancetype)defaultRecorder;
+
+/// Defaults to 25 MB if never set. Values set here are presisted across launches of the app.
+@property (nonatomic, assign) NSUInteger responseCacheByteLimit;
+
+/// If NO, the recorder not cache will not cache response for content types with an "image", "video", or "audio" prefix.
+@property (nonatomic, assign) BOOL shouldCacheMediaResponses;
+
+@property (nonatomic, copy) NSArray<NSString *> *hostBlacklist;
+
+
+// Accessing recorded network activity
+
+/// Array of FLEXNetworkTransaction objects ordered by start time with the newest first.
+- (NSArray<FLEXNetworkTransaction *> *)networkTransactions;
+
+/// The full response data IFF it hasn't been purged due to memory pressure.
+- (NSData *)cachedResponseBodyForTransaction:(FLEXNetworkTransaction *)transaction;
+
+/// Dumps all network transactions and cached response bodies.
+- (void)clearRecordedActivity;
+
+
+// Recording network activity
+
+/// Call when app is about to send HTTP request.
+- (void)recordRequestWillBeSentWithRequestID:(NSString *)requestID request:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse;
+
+/// Call when HTTP response is available.
+- (void)recordResponseReceivedWithRequestID:(NSString *)requestID response:(NSURLResponse *)response;
+
+/// Call when data chunk is received over the network.
+- (void)recordDataReceivedWithRequestID:(NSString *)requestID dataLength:(int64_t)dataLength;
+
+/// Call when HTTP request has finished loading.
+- (void)recordLoadingFinishedWithRequestID:(NSString *)requestID responseBody:(NSData *)responseBody;
+
+/// Call when HTTP request has failed to load.
+- (void)recordLoadingFailedWithRequestID:(NSString *)requestID error:(NSError *)error;
+
+/// Call to set the request mechanism anytime after recordRequestWillBeSent... has been called.
+/// This string can be set to anything useful about the API used to make the request.
+- (void)recordMechanism:(NSString *)mechanism forRequestID:(NSString *)requestID;
+
+@end