fix #625 : method 'dispose' was not called when page popped

ios/Classes/container/FLBFlutterViewContainer.m

@@ -263,11 +263,12 @@ static NSUInteger kInstanceCounter = 0;
                                                   params:_params
                                                 uniqueId:self.uniqueIDString];
     //如果当前不可见vc和engine所持有的vc一致。在FlutterVC在混合栈中是最后一张页面，如tab中的页面
-    if (self == FLUTTER_VC)
-    {
-        [self surfaceUpdated:NO];
-    }
+    // if (self == FLUTTER_VC)
+    // {
+    //     [self surfaceUpdated:NO];
+    // }
     [super bridge_viewDidDisappear:animated];
+    [FLUTTER_APP resume];
 }
 
 - (void)installSplashScreenViewIfNecessary {