当小部件加载时，我正在加载数据，如下面的代码。一旦 UI 完全加载，我喜欢添加一个刷新按钮来重新加载数据。

如何刷新 View ？

  class _MyHomePageState extends State<MyHomePage> {

      @override
      Widget build(BuildContext context) {
        var futureBuilder = new FutureBuilder(
          future: _getData(),
          builder: (BuildContext context, AsyncSnapshot snapshot) {
            switch (snapshot.connectionState) {
              case ConnectionState.none:
              case ConnectionState.waiting:
                return new Text('loading...');
              default:
                if (snapshot.hasError)
                  return new Text('Error: ${snapshot.error}');
                else
                  return createListView(context, snapshot);
            }
          },
        );

        return new Scaffold(
          appBar: new AppBar(
            title: new Text("Home Page"),
          ),
          body: futureBuilder,
        );
      }

      Future<List<String>> _getData() async {
        var values = new List<String>();

        await new Future.delayed(new Duration(seconds: 5));

        return values;
      }

      Widget createListView(BuildContext context, AsyncSnapshot snapshot) {

      }
    }

最佳答案

Widget createListView(BuildContext context, AsyncSnapshot snapshot) {
  RaisedButton button = RaisedButton(
    onPressed: () {
      setState(() {});
    },
    child: Text('Refresh'),
  );
  //.. here create widget with snapshot data and with necessary button
}

https://stackoverflow.com/questions/53170330/