如何从父小部件访问videoController

// 父小部件
class ParentWidget extends StatefulWidget {
  @override
  _ParentWidgetState createState() => _ParentWidgetState();
}

class _ParentWidgetState extends State<ParentWidget> {
  VideoController _videoController = VideoController();

  void accessVideoController() {
    // 访问videoController对象的方法
    _videoController.play();
  }

  @override
  Widget build(BuildContext context) {
    return ChildWidget(
      accessVideoController: accessVideoController,
    );
  }
}

// 子小部件
class ChildWidget extends StatelessWidget {
  final Function accessVideoController;

  ChildWidget({required this.accessVideoController});

  @override
  Widget build(BuildContext context) {
    // 在需要的地方调用accessVideoController方法来访问videoController对象
    accessVideoController();

    return Container();
  }
}

// videoController对象
class VideoController {
  void play() {
    // 播放视频的逻辑
  }
}