0

我有一个下一个RaisedButton可以进入下一个名为DetailOracion的屏幕。

基于Flutter的示例推送新屏幕但不起作用。

  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        backgroundColor: Colors.white,
        appBar: AppBar(
          title: Text('Oraciones Cristianas'),
        ),
        body: SafeArea(
            child: Padding(
          padding: EdgeInsets.all(10.0),
          child: Column(
            children: <Widget>[
              RaisedButton(
                onPressed: () {
                  Navigator.push(context,
                      MaterialPageRoute(builder: (context) => DetailOracion()));
                },
                child: Text('Hello Wolrd'),
              )
            ],
          ),
        )),
      ),
    );
  }

我的详情Oracion

class DetailOracion extends StatelessWidget {
@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: Text('Hola'),
    ),
    body: Text('Segunda Pantalla'),
  );
 }
}

错误消息是下一个

I/flutter ( 3441): The following assertion was thrown while handling a gesture:
I/flutter ( 3441): Navigator operation requested with a context that does not include a Navigator.
I/flutter ( 3441): The context used to push or pop routes from the Navigator must be that of a widget that is a
I/flutter ( 3441): descendant of a Navigator widget.
4

2 回答 2

1

使用MaterialPageRoute时,您需要从runApp()发送MaterialApp内部的主类

用代码解释

正确的

void main() => runApp(MaterialApp(
  title: 'Oraciones Cristianas',
  home: MyApp(),
));

您向您发送MaterialApp()的第一个 Screen insde ,能够使用MaterialPageRoute()

不正确

void main() => runApp(myApp());

如果您只是在没有MaterialApp()包装的情况下发送您的第一个屏幕,则不起作用

于 2019-06-05T05:07:13.337 回答
0

在您的按钮或 Column 周围使用 Builder,如下面的代码所示:

Builder(
    builder: (context) => RaisedButton(
          onPressed: () {
            Navigator.push(context,
                MaterialPageRoute(
                    builder: (context) => SelectUserType()));
          },
          child: Text('Registrese'),
        ),
  ),
于 2019-06-05T05:03:38.087 回答