In the release version, the random white screen does not display the content after opening the shutter

Using the command line

flutter run --release --verbose

It can be on the simulator , simulation release Running status on , Turn off the app process , There is also a log when you open it again

White screen reason ：

Flutter To speed up application startup , Not waiting size assignment , Start rendering the interface .

terms of settlement ：

monitor window Change in size , When not empty , Again runApp;runApp Must first WidgetsFlutterBinding.ensureInitialized(), Make sure there are WidgetsFlutterBinding example , Otherwise, the screen will be black

Future<void> main() async {

  // If size yes 0, Set callback , In the callback runApp
  if(window.physicalSize.isEmpty){
    print("window size is zero");
    window.onMetricsChanged = (){
      // In the callback ,size It could still be 0
      if(!window.physicalSize.isEmpty){
        window.onMetricsChanged = null;
        print("window onMetricsChanged,run app");
        runMyApp();
      }
    };
  } else{
    // If size Not 0, directly runApp
    print("window load success,run app");
    runMyApp();
  }
}

void runMyApp() async{

  print("window:  ${window.physicalSize.width}  ${window.physicalSize.height}");
  // Ensure that the loading is completed , only runApp
  WidgetsFlutterBinding.ensureInitialized();
  runApp(MyApp());
}

Use window Need to import dart:ui

import 'dart:ui';