import 'package:flutter/material.dart';
void main() => runApp(new HomePage());
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => new _HomePageState();
}
class _HomePageState extends State<HomePage> {
GlobalKey<FormState> _formKey = new GlobalKey<FormState>();
String _name;
String _password;
void _forSubmitted() {
var _form = _formKey.currentState;
if (_form.validate()) {
_form.save();
print(_name);
print(_password);
}
}
@override
Widget build(BuildContext context) {
// TODO: implement build
return new MaterialApp(
title: 'Flutter data',
home: new Scaffold(
appBar: new AppBar(
title: new Text('Flutter Form正确使用方法'),
),
floatingActionButton: new FloatingActionButton(
onPressed: _forSubmitted,
child: new Text('提交'),
),
body: new Container(
padding: const EdgeInsets.all(16.0),
child: new Form(
key: _formKey,
child: new Column(
children: <Widget>[
new TextFormField(
decoration: new InputDecoration(
labelText: 'Your Name',
),
onSaved: (val) {
_name = val;
},
),
new TextFormField(
decoration: new InputDecoration(
labelText: 'Password',
),
obscureText: true,
validator: (val) {
return val.length < ? "密码长度错误" : null;
},
onSaved: (val) {
_password = val;
},
),
Padding(
padding: const EdgeInsets.only(top: 28.0),
child: Row(
children: <Widget>[
Expanded(
child: RaisedButton(
padding: EdgeInsets.all(15.0),
child: Text('登录'),
color: Colors.blue,
textColor: Colors.white,
onPressed:this._forSubmitted,
)
)
]
),
)
],
),
),
),
),
);
}
}