open method

@override Future<Object> open(BuildContext context, VideoController controller)

您需要返回一个异步事件(通常是等待页面结束的异步事件) 请参考VideoController.customFullScreen的example

You need to return an asynchronous event (usually an asynchronous event waiting for the page to end) please refer to the example of VideoController.customFullScreen

Implementation

@override
Future<Object> open(BuildContext context, VideoController controller) async {
  bool isClose = false;
  late StreamSubscription f;
  document.documentElement!.requestFullscreen();
  f = document.documentElement!.onFullscreenChange.listen((e) {
    if (document.fullscreenElement == null && !isClose) {
      this.close(context, controller);
      f.cancel();
    }
  });

  await Navigator.of(context).push(_route(controller));
  if (document.fullscreenElement != null) {
    isClose = true;
    f.cancel();
    document.exitFullscreen();
  }
  return Null;
}