如何导航到另一个屏幕

How navigate to another screen

我有下一个 RaisedButton 去下一个名为 DetailOracion 的屏幕。

基于 Flutter 的示例推送新屏幕但确实有效。

  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'),
              )
            ],
          ),
        )),
      ),
    );
  }

我的详细信息

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.

在您的按钮或列周围使用生成器,如下面的代码所示:

Builder(
    builder: (context) => RaisedButton(
          onPressed: () {
            Navigator.push(context,
                MaterialPageRoute(
                    builder: (context) => SelectUserType()));
          },
          child: Text('Registrese'),
        ),
  ),

当使用 MaterialPageRoute 时,您需要从 runApp 发送 MaterialApp 内的主要 class ()

用代码解释

正确

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

您首先发送 MaterialApp() 的屏幕插入,可以使用 MaterialPageRoute()

不正确

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

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