Immediately trigger renderApplication from RCTRootView init

Reviewed By: fkgozali

Differential Revision: D4849610

fbshipit-source-id: 291a9bcdf0efe47d83130fe2675f3ef04a3f085b

Examples/UIExplorer/UIExplorerUnitTests/RCTComponentPropsTests.m

@@ -99,6 +99,7 @@ - (void)setUp
   _bridge = [[RCTBridge alloc] initWithBundleURL:[bundle URLForResource:@"UIExplorerUnitTestsBundle" withExtension:@"js"]
                                   moduleProvider:nil
                                    launchOptions:nil];
+  RUN_RUNLOOP_WHILE(_bridge.isLoading);
 }
 
 - (void)testSetProps

React/Base/RCTRootContentView.h

@@ -18,11 +18,13 @@
 
 @interface RCTRootContentView : RCTView <RCTInvalidating>
 
-@property (nonatomic, readonly) BOOL contentHasAppeared;
+@property (nonatomic, readonly, weak) RCTBridge *bridge;
+@property (nonatomic, readonly, assign) BOOL contentHasAppeared;
 @property (nonatomic, readonly, strong) RCTTouchHandler *touchHandler;
+@property (nonatomic, readonly, assign) CGSize availableSize;
+
 @property (nonatomic, assign) BOOL passThroughTouches;
 @property (nonatomic, assign) RCTRootViewSizeFlexibility sizeFlexibility;
-@property (nonatomic, readonly) CGSize availableSize;
 
 - (instancetype)initWithFrame:(CGRect)frame
                        bridge:(RCTBridge *)bridge

React/Base/RCTRootContentView.m

@@ -19,7 +19,6 @@
 
 @implementation RCTRootContentView
 {
-  __weak RCTBridge *_bridge;
   UIColor *_backgroundColor;
 }
 

React/Base/RCTRootView.m

@@ -92,11 +92,10 @@ - (instancetype)initWithBridge:(RCTBridge *)bridge
     }
 #endif
 
-    if (!_bridge.loading) {
-      [self bundleFinishedLoading:([_bridge batchedBridge] ?: _bridge)];
-    }
-
     [self showLoadingView];
+
+    // Immediately schedule the application to be started
+    [self bundleFinishedLoading:[_bridge batchedBridge]];
   }
 
   RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
@@ -259,11 +258,14 @@ - (void)javaScriptDidLoad:(NSNotification *)notification
   // Use the (batched) bridge that's sent in the notification payload, so the
   // RCTRootContentView is scoped to the right bridge
   RCTBridge *bridge = notification.userInfo[@"bridge"];
-  [self bundleFinishedLoading:bridge];
+  if (bridge != _contentView.bridge) {
+    [self bundleFinishedLoading:bridge];
+  }
 }
 
 - (void)bundleFinishedLoading:(RCTBridge *)bridge
 {
+  RCTAssert(bridge != nil, @"Bridge cannot be nil");
   if (!bridge.valid) {
     return;
   }

React/Modules/RCTUIManager.m

@@ -1207,7 +1207,7 @@ - (void)setNeedsLayout
 {
   // If there is an active batch layout will happen when batch finished, so we will wait for that.
   // Otherwise we immidiately trigger layout.
-  if (![_bridge isBatchActive]) {
+  if (![_bridge isBatchActive] && ![_bridge isLoading]) {
     [self _layoutAndMount];
   }
 }