Question

我试图解决此问题，但是我无法我正在将数据传递给构造函数进行初始化并放入源中有人可以帮我吗

插件：https://pub.dev/packages/flutter_ijkplayer

class FullScreen extends StatefulWidget {
  String url_ , userAgent;
  FullScreen(
    this.url_,
    this.userAgent,
  ) ;

  @override
  _FullScreenState createState() => _FullScreenState(this.url_, this.userAgent);
}

class _FullScreenState extends State<FullScreen> {
  var controller = IjkMediaController();
  String url , userAgent;


  _FullScreenState(this.url, this.userAgent);
  Orientation get orientation => MediaQuery.of(context).orientation;
  DataSource source = DataSource.network(
    widget.url_,------>ERROR : Error: Only static members can be accessed in initializers
    headers: {
      'User-Agent':widget.userAgent------>ERROR : Error: Only static members can be accessed in initializers
    }
  );


  @override
  initState() async {
    controller.setDataSource(source, autoPlay: true);
    super.initState();
  }

Answer 1

您只能访问静态成员初始化。要使变量成为静态变量，请在变量声明的前面使用static关键字。

静态字符串网址；

但是，如果你愿意。不想将其设为静态，则可以按以下方式在initistate中初始化该变量。

var controller;
  Orientation get orientation => MediaQuery.of(context).orientation;
  DataSource source;
  @override
  void initState() {
    super.initState();
    controller = IjkMediaController();
    source =
        DataSource.network(widget.url_, headers: {'User-Agent': widget.url_});
    controller.setDataSource(source, autoPlay: true);
  }

错误：在flutter中只能在初始化程序中访问静态成员

1 个答案: