RCTSurface: Stopping the app on surface object deallocation

Reviewed By: rsnara

Differential Revision: D6431628

fbshipit-source-id: 2b3fd39d77a1108516f00727dd21f648c2bf41b1

React/Base/Surface/RCTSurface.mm

@@ -85,7 +85,7 @@
       _stage = _stage | RCTSurfaceStageBridgeDidLoad;
     }
 
-    [self _registerRootViewTag];
+    [self _registerRootView];
     [self _run];
   }
 
@@ -94,6 +94,7 @@
 
 - (void)dealloc
 {
+  [self _stop];
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }
 
@@ -297,7 +298,18 @@
   [self _setStage:RCTSurfaceStageSurfaceDidRun];
 }
 
-- (void)_registerRootViewTag
+- (void)_stop
+{
+  RCTBridge *batchedBridge = self._batchedBridge;
+  [batchedBridge enqueueJSCall:@"AppRegistry"
+                        method:@"unmountApplicationComponentAtRootTag"
+                          args:@[self->_rootViewTag]
+                    completion:NULL];
+
+  [self _setStage:RCTSurfaceStageSurfaceDidStop];
+}
+
+- (void)_registerRootView
 {
   RCTBridge *batchedBridge;
   CGSize minimumSize;

React/Base/Surface/RCTSurfaceStage.h

@@ -22,7 +22,7 @@ typedef NS_OPTIONS(NSInteger, RCTSurfaceStage) {
   RCTSurfaceStageSurfaceDidInitialRendering = 1 << 4,  // UIManager created the first shadow views
   RCTSurfaceStageSurfaceDidInitialLayout = 1 << 5,     // UIManager completed the first layout pass
   RCTSurfaceStageSurfaceDidInitialMounting = 1 << 6,   // UIManager completed the first mounting pass
-  RCTSurfaceStageSurfaceDidInvalidate = 1 << 7,        // Surface received `invalidate` message
+  RCTSurfaceStageSurfaceDidStop = 1 << 7,              // Surface stopped
 };
 
 /**

React/Base/Surface/RCTSurfaceStage.m

@@ -12,11 +12,11 @@
 BOOL RCTSurfaceStageIsRunning(RCTSurfaceStage stage) {
   return
     (stage & RCTSurfaceStageSurfaceDidInitialLayout) &&
-    !(stage & RCTSurfaceStageSurfaceDidInvalidate);
+    !(stage & RCTSurfaceStageSurfaceDidStop);
 }
 
 BOOL RCTSurfaceStageIsPreparing(RCTSurfaceStage stage) {
   return
     !(stage & RCTSurfaceStageSurfaceDidInitialLayout) &&
-    !(stage & RCTSurfaceStageSurfaceDidInvalidate);
+    !(stage & RCTSurfaceStageSurfaceDidStop);
 }