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

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

其他回答

您可以使用FocusNode类中的unfocus()方法。

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  MyHomePageState createState() => new MyHomePageState();
}

class MyHomePageState extends State<MyHomePage> {
  TextEditingController _controller = new TextEditingController();
  FocusNode _focusNode = new FocusNode(); //1 - declare and initialize variable

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(),
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.send),
        onPressed: () {
            _focusNode.unfocus(); //3 - call this method here
        },
      ),
      body: new Container(
        alignment: FractionalOffset.center,
        padding: new EdgeInsets.all(20.0),
        child: new TextFormField(
          controller: _controller,
          focusNode: _focusNode, //2 - assign it to your TextFormField
          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());
}

2019-01-31 19:41:16

你可以用这个。

FocusScope或(上下文)。requestFocus (FocusNode ());

你可以使用这个手势侦测器的onTap或者像这样的InkWell。

“GestureDetector ( onTap:() {' //这个焦点范围将关闭键盘 FocusScope.of(上下文).requestFocus (FocusNode ()); forgotPasswordAPI (emailController.text); }”、“

2022-09-29 05:29:37

_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

对我来说，上面的App小部件监听器是我发现的最好的方法:

Listener(
  onPointerUp: (_) {
    FocusScopeNode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
      currentFocus.focusedChild.unfocus();
    }
  },
  child: MaterialApp(
    title: 'Flutter Test App',
    theme: theme,
    ...
  ),
)

2020-10-07 13:31:08

对于Flutter 1.17.3(截至2020年6月的稳定通道)，请使用

FocusManager.instance.primaryFocus.unfocus();

2020-06-11 14:50:43

如何解除屏幕上的键盘?

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