如何解除屏幕上的键盘?

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());
}

当前回答

这可能会简化情况。下面的代码只在键盘打开时才会工作

if(FocusScope.of(context).isFirstFocus) {
 FocusScope.of(context).requestFocus(new FocusNode());
}

2020-11-06 06:45:20

其他回答

_dismissKeyboard(BuildContext context) {
   FocusScope.of(context).requestFocus(new FocusNode());
}

@override
Widget build(BuildContext context) {

return new GestureDetector(
    onTap: () {
    this._dismissKeyboard(context);
    },
    child: new Container(
    color: Colors.white,
    child: new Column(
        children: <Widget>[/*...*/],
    ),
    ),
 );
}

2019-08-14 13:19:14

注意:这个答案已经过时了。有关Flutter的新版本，请参阅答案。

你可以通过把TextFormField的焦点拿走，并把它给一个未使用的FocusNode来解散键盘:

FocusScope.of(context).requestFocus(FocusNode());

2017-07-09 00:44:06

看起来不同的版本用不同的方法。我使用的是Flutter v1.17.1，下面的操作适合我。

onTap: () {
    FocusScopeNode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
       currentFocus.focusedChild.unfocus();
    }
}

2020-05-24 13:56:13

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;
}}

2018-09-15 13:34:57

FocusScope.of(上下文).unfocus ();是行不通的。

这段代码为我工作在颤振2.2.3和零安全。

WidgetsBinding.instance?.focusManager.primaryFocus?.unfocus()

来源:https://github.com/flutter/flutter/issues/20227 # issuecomment - 512860882

例如，把这段代码放在MyAppState中，当整个应用程序触摸外部时应用隐藏键盘。

return GestureDetector(
  onTap: () =>
      WidgetsBinding.instance?.focusManager.primaryFocus?.unfocus(),
  child: MaterialApp(
    title: 'Flutter Demo',
    theme: getTheme(),
    home: _body(),
  ),
);

2021-11-10 16:31:37

如何解除屏幕上的键盘?

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