flutter - 使用 Navigator.push (MaterialPageRoute) 而不是 AlertDialog

Question

我想使用 Navigator.push (MaterialPageRoute) 而不是 AlertDialog ，因为现在我认为我的用户最好有一个完整的页面来发布内容而不是一个对话框，我将如何编辑我的代码来做到这一点？提前致谢

 appBar: AppBar(
    centerTitle: true,
    title: Text('hehe',
    style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25.0),),
    actions: <Widget>[
      Padding(
        padding: const EdgeInsets.only(right: 10.0),
        child: IconButton(icon: Icon(Icons.comment),
            onPressed: () {
          showDialog(context: context,
          builder: (BuildContext context){
            return AlertDialog(
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10.0)),
              content: Form(key: formKey,
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  Padding(
                    padding: EdgeInsets.all(8.0),
                    child: TextFormField(
                      initialValue: '',
                      onSaved: (val) => board.subject = val,
                      validator: (val) => val == "" ? val: null,
                    ),
                  ),
                  Padding(
                    padding: EdgeInsets.all(8.0),
                    child: RaisedButton(
                      color: Colors.indigo,
                      child: Text(
                          'Post',
                      style: TextStyle(color: Colors.white),),
                      onPressed: () {
                        handleSubmit();
                        Navigator.of(context).pop();
                      },
                    ),
                  )
                ],
              ),
              ),
            );
          },
          );
            }
            ),
      ),
    ],
  ),

Answer 1

创建一个StatefulWidget子类说MyForm。

class MyForm extends StatefulWidget {
  @override
  _MyFormState createState() => _MyFormState();
}

class _MyFormState extends State<MyForm> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("My form")),
      body: Form(
        key: formKey,
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            Padding(
              padding: EdgeInsets.all(8.0),
              child: TextFormField(
                initialValue: '',
                onSaved: (val) => board.subject = val,
                validator: (val) => val == "" ? val : null,
              ),
            ),
            Padding(
              padding: EdgeInsets.all(8.0),
              child: RaisedButton(
                color: Colors.indigo,
                child: Text(
                  'Post',
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  handleSubmit();
                  Navigator.of(context).pop();
                },
              ),
            )
          ],
        ),
      ),
    );
  }
}

onPressed并在您的方法中像这样使用它。

onPressed: () {
  Navigator.push(context, MaterialPagerRoute(builder: (context) => MyForm()));
}

因此，当单击按钮时，您将被导航到当前是您的表单的新页面。