Bump version in FLEX.podspec

The isa field is not guaranteed to be a Class pointer on arm64, even though the type encoding indicates that it's a Class pointer.

.travis.yml

@@ -0,0 +1,8 @@
+language: objective-c
+xcode_workspace: FLEX.xcworkspace
+matrix:
+    include:
+        - xcode_scheme: UICatalog
+          xcode_sdk: iphonesimulator
+        - xcode_scheme: FLEX
+          xcode_sdk: iphonesimulator

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/ExplorerToolbar/FLEXExplorerViewController.h

@@ -15,6 +15,7 @@
 @property (nonatomic, weak) id <FLEXExplorerViewControllerDelegate> delegate;
 
 - (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates;
+- (BOOL)wantsWindowToBecomeKey;
 
 @end
 

Classes/ExplorerToolbar/FLEXExplorerViewController.m

@@ -120,77 +120,27 @@ 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) {
-        // We might need to foward to a child
-        UIViewController *childViewControllerToAsk = [viewControllerToAsk childViewControllerForStatusBarStyle];
-        while (childViewControllerToAsk && childViewControllerToAsk != viewControllerToAsk) {
-            viewControllerToAsk = childViewControllerToAsk;
-            childViewControllerToAsk = [viewControllerToAsk childViewControllerForStatusBarStyle];
-        }
-        
-        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) {
-        // Again, we might need to forward to a child
-        UIViewController *childViewControllerToAsk = [viewControllerToAsk childViewControllerForStatusBarHidden];
-        while (childViewControllerToAsk && childViewControllerToAsk != viewControllerToAsk) {
-            viewControllerToAsk = childViewControllerToAsk;
-            childViewControllerToAsk = [viewControllerToAsk childViewControllerForStatusBarHidden];
-        }
-        
-        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];
     }
@@ -206,7 +156,7 @@ 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];
@@ -860,9 +810,10 @@ 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.
@@ -874,4 +825,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     [self dismissViewControllerAnimated:animated completion:completion];
 }
 
+- (BOOL)wantsWindowToBecomeKey
+{
+    return self.previousKeyWindow != nil;
+}
+
 @end

Classes/ExplorerToolbar/FLEXManager.h

@@ -7,6 +7,7 @@
 //
 
 #import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
 
 @interface FLEXManager : NSObject
 

Classes/ExplorerToolbar/FLEXManager.m

@@ -111,6 +111,12 @@
     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
 

Classes/ExplorerToolbar/FLEXWindow.h

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

Classes/ExplorerToolbar/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 +1,17 @@
+//
+//  FLEX.h
+//  FLEX
+//
+//  Created by Eric Horacek on 7/18/15.
+//  Copyright (c) 2015 Flipboard. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+//! Project version number for FLEX.
+FOUNDATION_EXPORT double FLEXVersionNumber;
+
+//! Project version string for FLEX.
+FOUNDATION_EXPORT const unsigned char FLEXVersionString[];
+
+#import <FLEX/FLEXManager.h>

Classes/GlobalStateExplorers/FLEXFileBrowserFileOperationController.m

@@ -7,11 +7,14 @@
 //
 
 #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
@@ -73,6 +76,8 @@
 
 @property (nonatomic, copy, readonly) NSString *path;
 
+- (instancetype)initWithPath:(NSString *)path NS_DESIGNATED_INITIALIZER;
+
 @end
 
 @implementation FLEXFileBrowserFileRenameOperationController

Classes/GlobalStateExplorers/FLEXFileBrowserTableViewController.m

@@ -316,7 +316,7 @@
         NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
         fullPath = [self.path stringByAppendingPathComponent:subpath];
     } else {
-        indexPath = [self.searchDisplayController.searchResultsTableView indexPathForCell:sender];
+        indexPath = [self.searchController.searchResultsTableView indexPathForCell:sender];
         fullPath = [self.searchPaths objectAtIndex:indexPath.row];
     }
 
@@ -334,7 +334,7 @@
         NSString *subpath = [self.childPaths objectAtIndex:indexPath.row];
         fullPath = [self.path stringByAppendingPathComponent:subpath];
     } else {
-        indexPath = [self.searchDisplayController.searchResultsTableView indexPathForCell:sender];
+        indexPath = [self.searchController.searchResultsTableView indexPathForCell:sender];
         fullPath = [self.searchPaths objectAtIndex:indexPath.row];
     }
 
@@ -345,9 +345,9 @@
 
 - (void)reloadDisplayedPaths
 {
-    if (self.searchDisplayController.isActive) {
+    if (self.searchController.isActive) {
         [self reloadSearchPaths];
-        [self.searchDisplayController.searchResultsTableView reloadData];
+        [self.searchController.searchResultsTableView reloadData];
     } else {
         [self reloadChildPaths];
         [self.tableView reloadData];

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/Network/FLEXNetworkHistoryTableViewController.m

@@ -62,7 +62,10 @@
 
     UISearchBar *searchBar = [[UISearchBar alloc] init];
     [searchBar sizeToFit];
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
     self.searchController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
+#pragma clang diagnostic pop
     self.searchController.delegate = self;
     self.searchController.searchResultsDataSource = self;
     self.searchController.searchResultsDelegate = self;
@@ -229,10 +232,10 @@
     for (UITableView *tableView in tableViews) {
         for (FLEXNetworkTransactionTableViewCell *cell in [tableView visibleCells]) {
             if ([cell.transaction isEqual:transaction]) {
-                NSIndexPath *indexPath = [tableView indexPathForCell:cell];
-                if (indexPath) {
-                    [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
-                }
+                // 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;
             }
         }
@@ -358,9 +361,9 @@
             return [[transaction.request.URL absoluteString] rangeOfString:searchString options:NSCaseInsensitiveSearch].length > 0;
         }]];
         dispatch_async(dispatch_get_main_queue(), ^{
-            if ([self.searchDisplayController.searchBar.text isEqual:searchString]) {
+            if ([self.searchController.searchBar.text isEqual:searchString]) {
                 self.filteredNetworkTransactions = filteredNetworkTransactions;
-                [self.searchDisplayController.searchResultsTableView reloadData];
+                [self.searchController.searchResultsTableView reloadData];
             }
         });
     });

Classes/Network/FLEXNetworkRecorder.m

@@ -103,6 +103,8 @@ NSString *const kFLEXNetworkRecorderResponseCacheLimitDefaultsKey = @"com.flex.r
 
 - (void)recordRequestWillBeSentWithRequestID:(NSString *)requestID request:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse
 {
+    NSDate *startDate = [NSDate date];
+
     if (redirectResponse) {
         [self recordResponseReceivedWithRequestID:requestID response:redirectResponse];
         [self recordLoadingFinishedWithRequestID:requestID responseBody:nil];
@@ -112,7 +114,7 @@ NSString *const kFLEXNetworkRecorderResponseCacheLimitDefaultsKey = @"com.flex.r
         FLEXNetworkTransaction *transaction = [[FLEXNetworkTransaction alloc] init];
         transaction.requestID = requestID;
         transaction.request = request;
-        transaction.startTime = [NSDate date];
+        transaction.startTime = startDate;
 
         [self.orderedTransactions insertObject:transaction atIndex:0];
         [self.networkTransactionsForRequestIdentifiers setObject:transaction forKey:requestID];
@@ -124,6 +126,8 @@ NSString *const kFLEXNetworkRecorderResponseCacheLimitDefaultsKey = @"com.flex.r
 
 - (void)recordResponseReceivedWithRequestID:(NSString *)requestID response:(NSURLResponse *)response
 {
+    NSDate *responseDate = [NSDate date];
+
     dispatch_async(self.queue, ^{
         FLEXNetworkTransaction *transaction = [self.networkTransactionsForRequestIdentifiers objectForKey:requestID];
         if (!transaction) {
@@ -131,7 +135,7 @@ NSString *const kFLEXNetworkRecorderResponseCacheLimitDefaultsKey = @"com.flex.r
         }
         transaction.response = response;
         transaction.transactionState = FLEXNetworkTransactionStateReceivingData;
-        transaction.latency = -[transaction.startTime timeIntervalSinceNow];
+        transaction.latency = -[transaction.startTime timeIntervalSinceDate:responseDate];
 
         [self postUpdateNotificationForTransaction:transaction];
     });
@@ -152,13 +156,15 @@ NSString *const kFLEXNetworkRecorderResponseCacheLimitDefaultsKey = @"com.flex.r
 
 - (void)recordLoadingFinishedWithRequestID:(NSString *)requestID responseBody:(NSData *)responseBody
 {
+    NSDate *finishedDate = [NSDate date];
+
     dispatch_async(self.queue, ^{
         FLEXNetworkTransaction *transaction = [self.networkTransactionsForRequestIdentifiers objectForKey:requestID];
         if (!transaction) {
             return;
         }
         transaction.transactionState = FLEXNetworkTransactionStateFinished;
-        transaction.duration = -[transaction.startTime timeIntervalSinceNow];
+        transaction.duration = -[transaction.startTime timeIntervalSinceDate:finishedDate];
 
         BOOL shouldCache = [responseBody length] > 0;
         if (!self.shouldCacheMediaResponses) {

Classes/Network/FLEXNetworkTransaction.h

@@ -7,6 +7,7 @@
 //
 
 #import <Foundation/Foundation.h>
+#import "UIKit/UIKit.h"
 
 typedef NS_ENUM(NSInteger, FLEXNetworkTransactionState) {
     FLEXNetworkTransactionStateUnstarted,

Classes/Network/PonyDebugger/FLEXNetworkObserver.h

@@ -12,6 +12,8 @@
 //  which Square, Inc. licenses this file to you.
 //
 
+#import <Foundation/Foundation.h>
+
 extern NSString *const kFLEXNetworkObserverEnabledStateChangedNotification;
 
 /// This class swizzles NSURLConnection and NSURLSession delegate methods to observe events in the URL loading system.

Classes/Network/PonyDebugger/FLEXNetworkObserver.m

@@ -102,7 +102,7 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
 
 + (void)setShouldEnableOnLaunch:(BOOL)shouldEnableOnLaunch
 {
-    [[NSUserDefaults standardUserDefaults] setObject:@YES forKey:kFLEXNetworkObserverEnableOnLaunchDefaultsKey];
+    [[NSUserDefaults standardUserDefaults] setBool:shouldEnableOnLaunch forKey:kFLEXNetworkObserverEnableOnLaunchDefaultsKey];
 }
 
 + (BOOL)shouldEnableOnLaunch
@@ -149,6 +149,14 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
 /// The superclass implementation (and implementations in classes above that) will be executed without inteference if called from the original implementation.
 + (void)sniffWithoutDuplicationForObject:(NSObject *)object selector:(SEL)selector sniffingBlock:(void (^)(void))sniffingBlock originalImplementationBlock:(void (^)(void))originalImplementationBlock
 {
+    // If we don't have an object to detect nested calls on, just run the original implmentation and bail.
+    // This case can happen if someone besides the URL loading system calls the delegate methods directly.
+    // See https://github.com/Flipboard/FLEX/issues/61 for an example.
+    if (!object) {
+        originalImplementationBlock();
+        return;
+    }
+
     const void *key = selector;
 
     // Don't run the sniffing block if we're inside a nested call
@@ -344,15 +352,20 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
 {
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
-        Class class = [NSURLSessionTask class];
+        // In iOS 7 resume lives in __NSCFLocalSessionTask
+        // In iOS 8 resume lives in NSURLSessionTask
+        // In iOS 9 resume lives in __NSCFURLSessionTask
+        Class class = Nil;
+        if (![[NSProcessInfo processInfo] respondsToSelector:@selector(operatingSystemVersion)]) {
+            class = NSClassFromString([@[@"__", @"NSC", @"FLocalS", @"ession", @"Task"] componentsJoinedByString:@""]);
+        } else if ([[NSProcessInfo processInfo] operatingSystemVersion].majorVersion < 9) {
+            class = [NSURLSessionTask class];
+        } else {
+            class = NSClassFromString([@[@"__", @"NSC", @"FURLS", @"ession", @"Task"] componentsJoinedByString:@""]);
+        }
         SEL selector = @selector(resume);
         SEL swizzledSelector = [self swizzledSelectorForSelector:selector];
 
-        if ([self instanceRespondsButDoesNotImplementSelector:selector class:class]) {
-            // Dummy NSURLSessionTask to get the actual class, needed for iOS 7 (__NSCFURLSessionTask)
-            class = [[[NSURLSession sharedSession] dataTaskWithURL:[NSURL URLWithString:@"about:blank"]] superclass];
-        }
-
         Method originalResume = class_getInstanceMethod(class, selector);
 
         void (^swizzleBlock)(NSURLSessionTask *) = ^(NSURLSessionTask *slf) {
@@ -457,7 +470,6 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
 
         // The method signatures here are close enough that we can use the same logic to inject into all of them.
         const SEL selectors[] = {
-            @selector(dataTaskWithHTTPGetRequest:completionHandler:),
             @selector(dataTaskWithRequest:completionHandler:),
             @selector(dataTaskWithURL:completionHandler:),
             @selector(downloadTaskWithRequest:completionHandler:),
@@ -479,7 +491,10 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
 
             NSURLSessionTask *(^asyncDataOrDownloadSwizzleBlock)(Class, id, NSURLSessionAsyncCompletion) = ^NSURLSessionTask *(Class slf, id argument, NSURLSessionAsyncCompletion completion) {
                 NSURLSessionTask *task = nil;
-                if ([FLEXNetworkObserver isEnabled]) {
+                // If completion block was not provided sender expect to receive delegated methods or does not
+                // interested in callback at all. In this case we should just call original method implementation
+                // with nil completion block.
+                if ([FLEXNetworkObserver isEnabled] && completion) {
                     NSString *requestID = [self nextRequestID];
                     NSString *mechanism = [self mechansimFromClassMethod:selector onClass:class];
                     NSURLSessionAsyncCompletion completionWrapper = [self asyncCompletionWrapperForRequestID:requestID mechanism:mechanism completion:completion];
@@ -857,8 +872,6 @@ didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask delegate:(id <NSU
     Method method = class_getInstanceMethod(cls, selector);
     struct objc_method_description methodDescription = *method_getDescription(method);
 
-    typedef void (^NSURLSessionTaskDidCompleteWithErrorBlock)(id slf, SEL sel);
-
     BOOL (^undefinedBlock)(id <NSURLSessionTaskDelegate>, SEL) = ^(id slf, SEL sel) {
         return YES;
     };
@@ -1143,7 +1156,8 @@ static char const * const kFLEXRequestIDKey = "kFLEXRequestIDKey";
         FLEXInternalRequestState *requestState = [self requestStateForRequestID:requestID];
 
         if (!requestState.dataAccumulator) {
-            requestState.dataAccumulator = [[NSMutableData alloc] initWithCapacity:(NSUInteger)totalBytesExpectedToWrite];
+            NSUInteger unsignedBytesExpectedToWrite = totalBytesExpectedToWrite > 0 ? totalBytesExpectedToWrite : 0;
+            requestState.dataAccumulator = [[NSMutableData alloc] initWithCapacity:unsignedBytesExpectedToWrite];
             [[FLEXNetworkRecorder defaultRecorder] recordResponseReceivedWithRequestID:requestID response:downloadTask.response];
 
             NSString *requestMechanism = [NSString stringWithFormat:@"NSURLSessionDownloadTask (delegate: %@)", [delegate class]];

Classes/Utility/FLEXRuntimeUtility.m

@@ -206,6 +206,13 @@ const unsigned int kFLEXNumberOfImplicitArgs = 2;
 {
     id value = nil;
     const char *type = ivar_getTypeEncoding(ivar);
+#ifdef __arm64__
+    // See http://www.sealiesoftware.com/blog/archive/2013/09/24/objc_explain_Non-pointer_isa.html
+    const char *name = ivar_getName(ivar);
+    if (type[0] == @encode(Class)[0] && strcmp(name, "isa") != 0) {
+        value = object_getClass(object);
+    } else
+#endif
     if (type[0] == @encode(id)[0] || type[0] == @encode(Class)[0]) {
         value = object_getIvar(object, ivar);
     } else {
@@ -583,7 +590,7 @@ const unsigned int kFLEXNumberOfImplicitArgs = 2;
     if (encodingCString[0] == '@') {
         NSString *class = [encodingString substringFromIndex:1];
         class = [class stringByReplacingOccurrencesOfString:@"\"" withString:@""];
-        if ([class length] == 0) {
+        if ([class length] == 0 || [class isEqual:@"?"]) {
             class = @"id";
         } else {
             class = [class stringByAppendingString:@" *"];