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

你可以用"GestureDetector"来包装你的小部件，然后将"FocusScope.of(context).unfocus()"赋值给它的onTap函数

GestureDetector(
 onTap: () => FocusScope.of(context).unfocus(),
 child: child,
);

2021-08-09 15:56:44

其他回答

你可以用"GestureDetector"来包装你的小部件，然后将"FocusScope.of(context).unfocus()"赋值给它的onTap函数

GestureDetector(
 onTap: () => FocusScope.of(context).unfocus(),
 child: child,
);

2021-08-09 15:56:44

下面的代码帮助我隐藏键盘

   void initState() {
   SystemChannels.textInput.invokeMethod('TextInput.hide');
   super.initState();
   }

2019-05-28 12:44:25

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

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'),
        ),
      ),
    );
  }
}

2020-09-08 10:28:19

使用SystemChannels.textInput.invokeMethod (' TextInput.hide ');。当屏幕加载时，它将关闭/解除键盘。

void initState() {
  super.initState();
  SystemChannels.textInput.invokeMethod('TextInput.hide');
}

2022-04-06 19:25:31

如何解除屏幕上的键盘?

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