Merge pull request #622 from sundayman/master

解决iOS hot restart 白屏

ios/Classes/container/FLBFlutterViewContainer.m

@@ -179,11 +179,10 @@ static NSUInteger kInstanceCounter = 0;
                                               params:_params
                                             uniqueId:self.uniqueIDString];
     //Save some first time page info.
-    if(![FlutterBoostPlugin sharedInstance].fPagename){
     [FlutterBoostPlugin sharedInstance].fPagename = _name;
     [FlutterBoostPlugin sharedInstance].fPageId = self.uniqueIDString;
     [FlutterBoostPlugin sharedInstance].fParams = _params;
-    }
+    
  
     [super viewWillAppear:animated];
     [self.view setNeedsLayout];

lib/flutter_boost.dart

@@ -55,11 +55,7 @@ class FlutterBoost {
   static ContainerManagerState get containerManager =>
       _instance.containerManagerKey.currentState;
 
-  static TransitionBuilder init(
-      {TransitionBuilder builder,
-      PrePushRoute prePush,
-      PostPushRoute postPush}) {
-    if (Platform.isAndroid) {
+  static void onPageStart() {
     WidgetsBinding.instance.addPostFrameCallback((_) {
       singleton.channel.invokeMethod<Map>('pageOnStart').then((Map pageInfo) {
         if (pageInfo == null || pageInfo.isEmpty) return;
@@ -74,6 +70,21 @@ class FlutterBoost {
     });
   }
 
+  static TransitionBuilder init(
+      {TransitionBuilder builder,
+      PrePushRoute prePush,
+      PostPushRoute postPush}) {
+    if (Platform.isAndroid) {
+      onPageStart();
+    } else if (Platform.isIOS) {
+      assert(() {
+        () async {
+          onPageStart();
+        }();
+        return true;
+      }());
+    }
+
     return (BuildContext context, Widget child) {
       assert(child is Navigator, 'child must be Navigator, what is wrong?');