fix #625 on v1.12.13-hotfixes

example/lib/main.dart

@@ -21,6 +21,7 @@ class _MyAppState extends State<MyApp> {
       'first': (pageName, params, _) => FirstRouteWidget(),
       'firstFirst': (pageName, params, _) => FirstFirstRouteWidget(),
       'second': (pageName, params, _) => SecondRouteWidget(),
+      'secondStateful': (pageName, params, _) => SecondStatefulRouteWidget(),
       'tab': (pageName, params, _) => TabRouteWidget(),
       'platformView': (pageName, params, _) => PlatformRouteWidget(),
       'flutterFragment': (pageName, params, _) => FragmentRouteWidget(params),

example/lib/simple_page_widgets.dart

@@ -60,7 +60,7 @@ class _FirstRouteWidgetState extends State<FirstRouteWidget>{
                   print("open natve page!");
                   FlutterBoost.singleton.open("native").then((Map value) {
                     print(
-                        "call me when page is finished. did recieve second route result $value");
+                        "call me when page is finished. did recieve native route result $value");
                   });
                 },
               ),
@@ -85,6 +85,16 @@ class _FirstRouteWidgetState extends State<FirstRouteWidget>{
                 },
               ),
 
+              RaisedButton(
+                  child: Text('Present second stateful route'),
+                  onPressed: () {
+                    print("Present second stateful page!");
+                    FlutterBoost.singleton.open("secondStateful",urlParams:<dynamic,dynamic>{"present":true}).then((Map value) {
+                      print(
+                          "call me when page is finished. did recieve second stateful route result $value");
+                    });
+                  },
+                ),
                 RaisedButton(
                   child: Text('Present second route'),
                   onPressed: () {
@@ -195,7 +205,44 @@ class _EmbededFirstRouteWidgetState extends State<EmbededFirstRouteWidget> {
   }
   @override
   void dispose() {
-    print('[XDEBUG]:_EmbededFirstRouteWidgetState dispose called!');
+    print('[XDEBUG]:_EmbededFirstRouteWidgetState disposing~');
+    super.dispose();
+  }
+}
+
+class SecondStatefulRouteWidget extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() {
+    // TODO: implement createState
+    return _SecondStatefulRouteWidgetState();
+  }
+}
+class _SecondStatefulRouteWidgetState extends State<SecondStatefulRouteWidget>{
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("SecondStateful Route"),
+      ),
+      body: Center(
+        child: RaisedButton(
+          onPressed: () {
+            // Navigate back to first route when tapped.
+
+            BoostContainerSettings settings =
+                BoostContainer.of(context).settings;
+            FlutterBoost.singleton.close(settings.uniqueId,
+                result: <dynamic,dynamic>{"result": "data from second"});
+          },
+          child: Text('Go back with result!'),
+        ),
+      ),
+    );
+  }
+
+  @override
+  void dispose() {
+    print('[XDEBUG]:SecondStatefulRouteWidget disposing~');
     super.dispose();
   }
 }
@@ -557,6 +604,7 @@ class _PushWidgetState extends State<PushWidget> {
   @override
   void dispose() {
     // TODO: implement dispose
+    print('[XDEBUG] - PushWidget is disposing~');
     super.dispose();
     _backPressedListenerUnsub?.call();
   }

ios/Classes/Engine/FLBFlutterApplication.m

@@ -232,8 +232,7 @@
     NSString *oldName = params[@"oldName"];
     NSString *newName = params[@"newName"];
     if (oldName!=nil && [newName isEqualToString:@"default"]) {
-        FLBFlutterViewContainer *viewController = (FLBFlutterViewContainer *)self.flutterProvider.engine.viewController;
-        [viewController surfaceUpdated:NO];
+        [self.flutterProvider detach];
     }
 }
 

ios/Classes/Engine/FLBFlutterEngine.m

@@ -108,6 +108,7 @@
 - (void)detach
 {
     if(_engine.viewController != _dummy){
+        [(FLBFlutterViewContainer *)_engine.viewController surfaceUpdated:NO];
         _engine.viewController = _dummy;
     }
 }

ios/Classes/container/FLBFlutterViewContainer.m

@@ -157,23 +157,33 @@ static NSUInteger kInstanceCounter = 0;
 }
 
 - (void)willMoveToParentViewController:(UIViewController *)parent {
-    if (parent) {
+    if (parent && _name) {
+        //当VC将要被移动到Parent中的时候，才出发flutter层面的page init
         [BoostMessageChannel didInitPageContainer:^(NSNumber *r) {}
                pageName:_name
                  params:_params
                uniqueId:[self uniqueIDString]];
     }
+    [super willMoveToParentViewController:parent];
 }
 
 - (void)didMoveToParentViewController:(UIViewController *)parent {
     if (!parent) {
+        //当VC被移出parent时，就通知flutter层销毁page
         [self notifyWillDealloc];
     }
+    [super didMoveToParentViewController:parent];
 }
 
 - (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion {
+    
+    [super dismissViewControllerAnimated:flag completion:^(){
+        if (completion) {
+            completion();
+        }
+        //当VC被dismiss时，就通知flutter层销毁page
         [self notifyWillDealloc];
-    [super dismissViewControllerAnimated:flag completion:completion];
+    }];
 }
 
 - (void)dealloc

lib/container/container_coordinator.dart

@@ -102,7 +102,7 @@ class ContainerCoordinator {
       Map map = event;
       final String type = map['type'];
 
-      Logger.log("onEvent $type");
+      Logger.log('onEvent $type');
 
       switch (type) {
         //Handler back key pressed event.
@@ -242,7 +242,7 @@ class ContainerCoordinator {
         ContainerLifeCycle.Appear);
 
     Logger.log(
-        'native containner did show,\nmanager dump:\n${FlutterBoost.containerManager?.dump()}');
+        'native containner did show-$name,\nmanager dump:\n${FlutterBoost.containerManager?.dump()}');
 
     return true;
   }
@@ -275,7 +275,7 @@ class ContainerCoordinator {
     FlutterBoost.containerManager?.remove(pageId);
 
     Logger.log(
-        'native containner dealloc, \n manager dump:\n${FlutterBoost.containerManager?.dump()}');
+        'native containner dealloc for $name, \n manager dump:\n${FlutterBoost.containerManager?.dump()}');
 
     return true;
   }