[ReactNative] Remove bridge retaining cycles

React/Base/RCTBridge.m

@@ -610,7 +610,6 @@ static id<RCTJavaScriptExecutor> _latestJSExecutor;
                                                               selector:@selector(reload)
                                                                   name:RCTReloadNotification
                                                                 object:nil];
-                     ;
                    }
                  }];
   }
@@ -619,6 +618,8 @@ static id<RCTJavaScriptExecutor> _latestJSExecutor;
 - (void)bindKeys
 {
 #if TARGET_IPHONE_SIMULATOR
+  __weak RCTBridge *weakSelf = self;
+
   // Workaround around the first cmd+r not working: http://openradar.appspot.com/19613391
   // You can register just the cmd key and do nothing. This will trigger the bug and cmd+r
   // will work like a charm!
@@ -627,27 +628,33 @@ static id<RCTJavaScriptExecutor> _latestJSExecutor;
                                                         action:^(UIKeyCommand *command) {
                                                           // Do nothing
                                                         }];
-
   [[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"r"
                                                  modifierFlags:UIKeyModifierCommand
                                                         action:^(UIKeyCommand *command) {
-                                                          [self reload];
+                                                          [weakSelf reload];
                                                         }];
   [[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"n"
                                                  modifierFlags:UIKeyModifierCommand
                                                         action:^(UIKeyCommand *command) {
-                                                          _executorClass = Nil;
-                                                          [self reload];
+                                                          RCTBridge *strongSelf = weakSelf;
+                                                          if (!strongSelf) {
+                                                            return;
+                                                          }
+                                                          strongSelf->_executorClass = Nil;
+                                                          [strongSelf reload];
                                                         }];
-
   [[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"d"
                                                  modifierFlags:UIKeyModifierCommand
                                                         action:^(UIKeyCommand *command) {
-                                                          _executorClass = NSClassFromString(@"RCTWebSocketExecutor");
-                                                          if (!_executorClass) {
+                                                          RCTBridge *strongSelf = weakSelf;
+                                                          if (!strongSelf) {
+                                                            return;
+                                                          }
+                                                          strongSelf->_executorClass = NSClassFromString(@"RCTWebSocketExecutor");
+                                                          if (!strongSelf->_executorClass) {
                                                             RCTLogError(@"WebSocket debugger is not available. Did you forget to include RCTWebSocketExecutor?");
                                                           }
-                                                          [self reload];
+                                                          [strongSelf reload];
                                                         }];
 #endif
 }
@@ -662,7 +669,7 @@ static id<RCTJavaScriptExecutor> _latestJSExecutor;
 
 - (void)dealloc
 {
-  RCTAssert(!self.valid, @"must call -invalidate before -dealloc");
+  [self invalidate];
 }
 
 #pragma mark - RCTInvalidating
@@ -674,6 +681,15 @@ static id<RCTJavaScriptExecutor> _latestJSExecutor;
 
 - (void)invalidate
 {
+  if (!self.isValid && _modulesByID == nil) {
+    return;
+  }
+
+  if (![NSThread isMainThread]) {
+    [self performSelectorOnMainThread:@selector(invalidate) withObject:nil waitUntilDone:YES];
+    return;
+  }
+
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 
   // Wait for queued methods to finish

React/Base/RCTBridgeModule.h

@@ -31,7 +31,7 @@ typedef void (^RCTResponseSenderBlock)(NSArray *response);
  * will be set automatically by the bridge when it initializes the module.
 * To implement this in your module, just add @synthesize bridge = _bridge;
  */
-@property (nonatomic, strong) RCTBridge *bridge;
+@property (nonatomic, weak) RCTBridge *bridge;
 
 /**
  * The module name exposed to JS. If omitted, this will be inferred

React/Base/RCTJavaScriptLoader.m

@@ -24,7 +24,7 @@
  */
 @implementation RCTJavaScriptLoader
 {
-  RCTBridge *_bridge;
+  __weak RCTBridge *_bridge;
 }
 
 /**

React/Base/RCTRootView.m

@@ -92,19 +92,6 @@ NSString *const RCTReloadViewsNotification = @"RCTReloadViewsNotification";
 - (void)setUp
 {
   if (!_registered) {
-    /**
-     * Every root view that is created must have a unique react tag.
-     * Numbering of these tags goes from 1, 11, 21, 31, etc
-     *
-     * NOTE: Since the bridge persists, the RootViews might be reused, so now
-     * the react tag is assigned every time we load new content.
-     */
-    _contentView = [[UIView alloc] init];
-    _contentView.reactTag = [_bridge.uiManager allocateRootTag];
-    _touchHandler = [[RCTTouchHandler alloc] initWithBridge:_bridge];
-    [_contentView addGestureRecognizer:_touchHandler];
-    [self addSubview:_contentView];
-
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(reload)
                                                  name:RCTReloadViewsNotification
@@ -122,9 +109,9 @@ NSString *const RCTReloadViewsNotification = @"RCTReloadViewsNotification";
 
 - (void)tearDown
 {
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
   if (_registered) {
     _registered = NO;
-    [[NSNotificationCenter defaultCenter] removeObserver:self];
     [_contentView removeGestureRecognizer:_touchHandler];
     [_contentView removeFromSuperview];
     [_touchHandler invalidate];
@@ -174,6 +161,19 @@ NSString *const RCTReloadViewsNotification = @"RCTReloadViewsNotification";
 {
   dispatch_async(dispatch_get_main_queue(), ^{
     _registered = YES;
+    /**
+     * Every root view that is created must have a unique react tag.
+     * Numbering of these tags goes from 1, 11, 21, 31, etc
+     *
+     * NOTE: Since the bridge persists, the RootViews might be reused, so now
+     * the react tag is assigned every time we load new content.
+     */
+    _contentView = [[UIView alloc] initWithFrame:self.bounds];
+    _contentView.reactTag = [_bridge.uiManager allocateRootTag];
+    _touchHandler = [[RCTTouchHandler alloc] initWithBridge:_bridge];
+    [_contentView addGestureRecognizer:_touchHandler];
+    [self addSubview:_contentView];
+
     NSString *moduleName = _moduleName ?: @"";
     NSDictionary *appParameters = @{
                                     @"rootTag": _contentView.reactTag,
@@ -197,7 +197,7 @@ NSString *const RCTReloadViewsNotification = @"RCTReloadViewsNotification";
 - (void)setFrame:(CGRect)frame
 {
   [super setFrame:frame];
-  _contentView.frame = self.bounds;
+  _contentView.frame = (CGRect){CGPointZero, frame.size};
 }
 
 - (void)reload

React/Executors/RCTContextExecutor.m

@@ -167,12 +167,13 @@ static NSError *RCTNSErrorFromJSError(JSContextRef context, JSValueRef jsError)
 
 - (void)invalidate
 {
-  if ([NSThread currentThread] != _javaScriptThread) {
-    // Yes, block until done. If we're getting called right before dealloc, it's the only safe option.
-    [self performSelector:@selector(invalidate) onThread:_javaScriptThread withObject:nil waitUntilDone:YES];
-  } else if (_context != NULL) {
-    JSGlobalContextRelease(_context);
-    _context = NULL;
+  if (self.isValid) {
+    if ([NSThread currentThread] != _javaScriptThread) {
+      [self performSelector:@selector(invalidate) onThread:_javaScriptThread withObject:nil waitUntilDone:NO];
+    } else {
+      JSGlobalContextRelease(_context);
+      _context = NULL;
+    }
   }
 }
 

React/Modules/RCTUIManager.m

@@ -177,7 +177,7 @@ static UIViewAnimationCurve UIViewAnimationCurveFromRCTAnimationType(RCTAnimatio
 
 @implementation RCTUIManager
 {
-  dispatch_queue_t _shadowQueue;
+  __weak dispatch_queue_t _shadowQueue;
 
   // Root views are only mutated on the shadow queue
   NSMutableSet *_rootViewTags;
@@ -319,7 +319,6 @@ static NSString *RCTViewNameForModuleName(NSString *moduleName)
 
   // Register shadow view
   dispatch_async(_shadowQueue, ^{
-
     RCTShadowView *shadowView = [[RCTShadowView alloc] init];
     shadowView.reactTag = reactTag;
     shadowView.frame = frame;
@@ -934,11 +933,9 @@ static void RCTMeasureLayout(RCTShadowView *view,
                              RCTResponseSenderBlock callback)
 {
   if (!view) {
-    RCTLogError(@"Attempting to measure view that does not exist");
     return;
   }
   if (!ancestor) {
-    RCTLogError(@"Attempting to measure relative to ancestor that does not exist");
     return;
   }
   CGRect result = [view measureLayoutRelativeToAncestor:ancestor];

React/Views/RCTViewManager.h

@@ -28,7 +28,7 @@ typedef void (^RCTViewManagerUIBlock)(RCTUIManager *uiManager, RCTSparseArray *v
  * allowing the manager (or the views that it manages) to manipulate the view
  * hierarchy and send events back to the JS context.
  */
-@property (nonatomic, strong) RCTBridge *bridge;
+@property (nonatomic, weak) RCTBridge *bridge;
 
 /**
  * The module name exposed to React JS. If omitted, this will be inferred