Question

我想将地图的一个对象从一个颤动屏幕传递到另一个

Answer 1

这是一个示例。
屏幕一

class ScreenOne extends StatefulWidget {
  ScreenOne({Key key}) : super(key: key);

  @override
  _ScreenOneState createState() => _ScreenOneState();
}

class _ScreenOneState extends State<ScreenOne> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Screen One"),
      ),
      body: Container(
        child: FlatButton(
          child: Text("Goto Screen Two"),
          onPressed: () {
            Map<String, dynamic> map = {
              "field": "value",
              "another_field": 1,
            };
            Navigator.of(context).push(MaterialPageRoute(builder: (context) => ScreenTwo(receivedMap: map,),));
          },
        ),
      ),
    );
  }
}

屏幕二

class ScreenTwo extends StatefulWidget {
  Map<String, dynamic> receivedMap;

  ScreenTwo({this.receivedMap});

  @override
  _ScreenTwoState createState() => _ScreenTwoState();
}

class _ScreenTwoState extends State<ScreenTwo> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Screen Two"),
      ),
      body: Container(
        child: Text("Screen one sent me this : ${widget.receivedMap["field"]} and ${widget.receivedMap["another_field"]}"),
      ),
    );
  }
}

编辑
如果需要，您也可以使用 StatelessWidget

如何在颤动中将地图从一个屏幕传递到另一个屏幕？

1 个答案: