我用TextFormField收集用户输入，当用户按下FloatingActionButton表示他们已经完成时，我想解散屏幕上的键盘。
如何让键盘自动消失?
import 'package:flutter/material.dart';
class MyHomePage extends StatefulWidget {
MyHomePageState createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> {
TextEditingController _controller = new TextEditingController();
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(),
floatingActionButton: new FloatingActionButton(
child: new Icon(Icons.send),
onPressed: () {
setState(() {
// send message
// dismiss on screen keyboard here
_controller.clear();
});
},
),
body: new Container(
alignment: FractionalOffset.center,
padding: new EdgeInsets.all(20.0),
child: new TextFormField(
controller: _controller,
decoration: new InputDecoration(labelText: 'Example Text'),
),
),
);
}
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
home: new MyHomePage(),
);
}
}
void main() {
runApp(new MyApp());
}
你也可以为你的文本域声明一个focusNode，当你完成时，你可以在那个focusNode上调用unfocus方法
然后处理它
class MyHomePage extends StatefulWidget {
MyHomePageState createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> {
TextEditingController _controller = new TextEditingController();
/// declare focus
final FocusNode _titleFocus = FocusNode();
@override
void dispose() {
_titleFocus.dispose();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(),
floatingActionButton: new FloatingActionButton(
child: new Icon(Icons.send),
onPressed: () {
setState(() {
// send message
// dismiss on screen keyboard here
_titleFocus.unfocus();
_controller.clear();
});
},
),
body: new Container(
alignment: FractionalOffset.center,
padding: new EdgeInsets.all(20.0),
child: new TextFormField(
controller: _controller,
focusNode: _titleFocus,
decoration: new InputDecoration(labelText: 'Example Text'),
),
),
);
}
}
以上的解决方案都不适合我。
Flutter的意思是
把你的小部件在新手势检测器()上，点击将隐藏键盘和onTap使用FocusScope.of(context)。新FocusNode requestFocus (())
class Home extends StatelessWidget {
@override
Widget build(BuildContext context) {
var widget = new MaterialApp(
home: new Scaffold(
body: new Container(
height:500.0,
child: new GestureDetector(
onTap: () {
FocusScope.of(context).requestFocus(new FocusNode());
},
child: new Container(
color: Colors.white,
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
new TextField( ),
new Text("Test"),
],
)
)
)
)
),
);
return widget;
}}
======解散键盘后，点击TextField =======
@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: () => FocusScope.of(context).unfocus(), //this will dismiss keyboard
child: Scaffold(
body: SafeArea(
.........
======滚动屏幕时关闭键盘=======
ListView(
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag, //this will dismiss
children: [
..........
SingleChildScrollView小部件也有这个属性。
