监听要销毁 myController.dispose();
TextField 没有height属性， 这里用 maxLines 来控制高度，也可以设置 minLines，让高度随输入内容变化
class _FeedbackPageState extends State<FeedbackPage> {
final myController = TextEditingController(); //输入监听
@override
void dispose() {
myController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('意见反馈'),
),
body: getBodyView(),
);
}
Container getBodyView() => Container(
child: Column(
children: <Widget>[
Padding(
padding: EdgeInsets.fromLTRB(10, 10, 10, 10),
child: TextField(
controller: myController,
maxLines: 10,
decoration: InputDecoration(
hintText: "请填写您宝贵的意见",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(5.0),
borderSide: BorderSide()),
),
obscureText: false, //是否是密码
cursorColor: Colors.red, //光标颜色
//内容改变的回调
onChanged: (text) {
print('change $text');
},
//内容提交(按回车)的回调
onSubmitted: (text) {
print('submit $text');
},
//按回车时调用
onEditingComplete: () {
print('onEditingComplete');
},
),
),
Container(
margin: EdgeInsets.only(top: 30),
width: 300,
height: 40,
child: RaisedButton(
child: Text('提交'),
color: Colors.red,
textColor: Colors.white,
onPressed: () {
if (myController.text.length > 0) {
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
content: Text(myController.text),
);
},
);
} else {
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
content: Text('请输入内容'),
);
},
);
}
},
),
),
],
),
);
}
通过修改 enabledBorder 和 focusedBorder 可以调整边框在选中和失焦时的颜色
child: TextField(
controller: pwdController,
obscureText: true,
decoration: InputDecoration(
hintText: '请输入验证码',
prefixIcon: Icon(Icons.lock),
enabledBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.orange),
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.red),
),
),
),
套一层 Theme 修改主题颜色可以修改 TextField 选中时整体颜色（边框+prefixIcon）
Theme(
data: new ThemeData(primaryColor: Colors.red),
child: TextField(
controller: accountController,
decoration: InputDecoration(
hintText: '请输入您的手机号',
prefixIcon: Icon(Icons.person),
),
),
)