Flutter组件-Input-TextField-文本输入框

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示例代码

//文档地址:https://docs.flutter.io/flutter/material/TextField-class.html
import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: '',
home: new Scaffold(
appBar: new AppBar(
title: new Text(''),
),
body:LoginPage(),
),
);
}
}

//登录组件
class LoginPage extends StatefulWidget{

@override
State<StatefulWidget> createState() => LoginPageState();

}

class LoginPageState extends State<LoginPage>{

//文本编辑控制器
TextEditingController usernameController = TextEditingController();

TextEditingController passwordController = TextEditingController();

@override
Widget build(BuildContext context) {
return Column(
children: <Widget>[

TextField(
controller: usernameController,
//TextCapitalization.words 将每个单词的首字母大写
//TextCapitalization.sentences 将首字母大写
//TextCapitalization.characters 将所有字母大写
textCapitalization: TextCapitalization.characters,
//键盘类型
keyboardType: TextInputType.number,
decoration: InputDecoration(
//内容的内边距
contentPadding: EdgeInsets.all(10.0),
icon: Icon(Icons.person),
//提示文本
labelText: '请输入你的用户名',
helperText: '请输入注册的用户名',
),
//键盘插件按钮样式
textInputAction: TextInputAction.go,
//设置光标样式
//          cursorColor: Colors.green,
//          cursorRadius: Radius.circular(16.0),
//          cursorWidth: 16.0,
),
TextField(
controller: passwordController,
keyboardType: TextInputType.number,
decoration: InputDecoration(
contentPadding: EdgeInsets.all(10.0),
icon: Icon(Icons.lock),
labelText: '请输入密码',
),
obscureText: true,
),
RaisedButton(
onPressed: (){
loginCheck();
},
child: Text('登录'),
),

//decoration示例
//        TextField(
//          //带外边框的样式
//          decoration: InputDecoration(
//            border: OutlineInputBorder(),
//            hintText: '请输入你的用户名',
//            labelText: '用户名',
//            prefixIcon: Icon(Icons.person),
//            suffixIcon: Icon(Icons.print),
//          ),
//        ),

],
);
}

loginCheck(){

if(usernameController.text.length != 11){
print('请输入正确的手机号');
}

if(passwordController.text.length != 6){
print('请输入6位以上的密码');
}

}

}

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