2021

Question

我找不到任何显示如何创建类似于floatingActionButton的圆形图标按钮的示例。任何人都可以建议如何/什么需要创建自定义按钮，如floatingActionButton。感谢。

Answer 1

我认为RawMaterialButton更适合。

new RawMaterialButton(
  onPressed: () {},
  child: new Icon(
     Icons.pause,
     color: Colors.blue,
     size: 35.0,
  ),
  shape: new CircleBorder(),
  elevation: 2.0,
  fillColor: Colors.white,
  padding: const EdgeInsets.all(15.0),
),

Answer 2

您只需要使用以下形状：CircleBorder()

MaterialButton(
  onPressed: () {},
  color: Colors.blue,
  textColor: Colors.white,
  child: Icon(
    Icons.camera_alt,
    size: 24,
  ),
  padding: EdgeInsets.all(16),
  shape: CircleBorder(),
)

Answer 3

颤动伴随着FloatingActionButton

示例：

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        title: 'msc',
        home: new Scaffold(
            body: new Center(
              child: new FloatingActionButton(
                backgroundColor: Colors.redAccent,
                onPressed: () => {},
              ),
            )));
  }
}

Answer 4

您可以使用InkWell执行此操作：

材质的矩形区域，响应触摸。

下面的示例演示了如何使用InkWell。 注意：您不需要StatefulWidget来执行此操作。我用它来改变计数的状态。

示例：

import 'package:flutter/material.dart';

class SettingPage extends StatefulWidget {
  @override
  _SettingPageState createState() => new _SettingPageState();
}

class _SettingPageState extends State<SettingPage> {
  int _count = 0;
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new Center(
        child: new InkWell(// this is the one you are looking for..........
        onTap: () => setState(() => _count++),
        child: new Container(
          //width: 50.0,
          //height: 50.0,
          padding: const EdgeInsets.all(20.0),//I used some padding without fixed width and height
          decoration: new BoxDecoration(
            shape: BoxShape.circle,// You can use like this way or like the below line
            //borderRadius: new BorderRadius.circular(30.0),
            color: Colors.green,
          ),
          child: new Text(_count.toString(), style: new TextStyle(color: Colors.white, fontSize: 50.0)),// You can add a Icon instead of text also, like below.
          //child: new Icon(Icons.arrow_forward, size: 50.0, color: Colors.black38)),
        ),//............
      ),
      ),
    );
  }
}

如果您希望获得splashColor，highlightColor的好处，请使用带有素材类型圈的InkWell小部件包装Material小部件。然后移除decoration小部件中的Container。

结果：

Answer 5

如果需要背景图像，则可以将CircleAvatar与IconButton一起使用。设置backgroundImage属性。

CircleAvatar(
  backgroundImage: NetworkImage(userAvatarUrl),
)

带有按钮的示例：

        CircleAvatar(
          backgroundColor: Colors.blue,
          radius: 20,
          child: IconButton(
            padding: EdgeInsets.zero,
            icon: Icon(Icons.add),
            color: Colors.white,
            onPressed: () {},
          ),
        ),

Answer 6

RawMaterialButton(
  onPressed: () {},
  constraints: BoxConstraints(),
  elevation: 2.0,
  fillColor: Colors.white,
  child: Icon(
    Icons.pause,
    size: 35.0,
  ),
  padding: EdgeInsets.all(15.0),
  shape: CircleBorder(),
)

请注意constraints: BoxConstraints()，这是因为不允许在其中填充。

扑扑快乐！

Answer 7

使用 ElevatedButton：

          ElevatedButton(
            onPressed: () {},
            child: Icon(
              Icons.add,
              color: Colors.white,
              size: 60.0,
            ),
            style: ElevatedButton.styleFrom(
                shape: CircleBorder(), primary: Colors.green),
          )

Answer 8

实际上有一个示例，该示例如何创建类似于FloatingActionButton的圆形IconButton。

Ink(
    decoration: const ShapeDecoration(
        color: Colors.lightBlue,
        shape: CircleBorder(),
    ),
    child: IconButton(
        icon: Icon(Icons.home),
        onPressed: () {},
    ),
)

要使用此代码示例创建本地项目，请运行：

flutter create --sample=material.IconButton.2 mysample

Answer 9

我的贡献：

import 'package:flutter/material.dart';

///
/// Create a circle button with an icon.
///
/// The [icon] argument must not be null.
///
class CircleButton extends StatelessWidget {
  const CircleButton({
    Key key,
    @required this.icon,
    this.padding = const EdgeInsets.all(8.0),
    this.color,
    this.onPressed,
    this.splashColor,
  })  : assert(icon != null),
        super(key: key);

  /// The [Icon] contained ny the circle button.
  final Icon icon;

  /// Empty space to inscribe inside the circle button. The [icon] is
  /// placed inside this padding.
  final EdgeInsetsGeometry padding;

  /// The color to fill in the background of the circle button.
  ///
  /// The [color] is drawn under the [icon].
  final Color color;

  /// The callback that is called when the button is tapped or otherwise activated.
  ///
  /// If this callback is null, then the button will be disabled.
  final void Function() onPressed;

  /// The splash color of the button's [InkWell].
  ///
  /// The ink splash indicates that the button has been touched. It
  /// appears on top of the button's child and spreads in an expanding
  /// circle beginning where the touch occurred.
  ///
  /// The default splash color is the current theme's splash color,
  /// [ThemeData.splashColor].
  final Color splashColor;

  @override
  Widget build(BuildContext context) {
    final ThemeData theme = Theme.of(context);

    return ClipOval(
      child: Material(
        type: MaterialType.button,
        color: color ?? theme.buttonColor,
        child: InkWell(
          splashColor: splashColor ?? theme.splashColor,
          child: Padding(
            padding: padding,
            child: icon,
          ),
          onTap: onPressed,
        ),
      ),
    );
  }
}

Answer 10

此代码将帮助您添加按钮，而不会出现不必要的填充，

RawMaterialButton(
      elevation: 0.0,
      child: Icon(Icons.add),
      onPressed: (){},
      constraints: BoxConstraints.tightFor(
        width: 56.0,
        height: 56.0,
      ),
      shape: CircleBorder(),
      fillColor: Color(0xFF4C4F5E),
    ),

Answer 11

之所以使用这一点，是因为我喜欢自定义边框半径和大小。

  Material( // pause button (round)
    borderRadius: BorderRadius.circular(50), // change radius size
    color: Colors.blue, //button colour
    child: InkWell(
      splashColor: Colors.blue[900], // inkwell onPress colour
      child: SizedBox(
        width: 35,height: 35, //customisable size of 'button'
        child: Icon(Icons.pause,color: Colors.white,size: 16,),
      ),
      onTap: () {}, // or use onPressed: () {}
    ),
  ),

  Material( // eye button (customised radius)
    borderRadius: BorderRadius.only(
        topRight: Radius.circular(10.0),
        bottomLeft: Radius.circular(50.0),),
    color: Colors.blue,
    child: InkWell(
      splashColor: Colors.blue[900], // inkwell onPress colour
      child: SizedBox(
        width: 40, height: 40, //customisable size of 'button'
        child: Icon(Icons.remove_red_eye,color: Colors.white,size: 16,),),
      onTap: () {}, // or use onPressed: () {}
    ),
  ),

Answer 12

我创建了一个具有正确剪裁，高程和边框的版本。随时对其进行自定义。

Material(
    elevation: 2.0,
    clipBehavior: Clip.hardEdge,
    borderRadius: BorderRadius.circular(50),
    color: Colors.white,
    child: InkWell(
        onTap: () => null,
        child: Container(
            padding: EdgeInsets.all(9.0),
            decoration: BoxDecoration(
                shape: BoxShape.circle,
                border: Border.all(color: Colors.blue, width: 1.4)),
           child: Icon(
                Icons.menu,
                size: 22,
                color: Colors.red,
            ),
        ),
    ),
)),

Answer 13

不是重大解决方案：

final double floatingButtonSize = 60;
final IconData floatingButtonIcon;

TouchableOpacity(
  onTap: () {
     /// Do something...
  },
  activeOpacity: 0.7,
  child: Container(
    height: floatingButtonSize,
    width: floatingButtonSize,
    decoration: BoxDecoration(
      borderRadius: BorderRadius.circular(floatingButtonSize / 2),
      color: Theme.of(context).primaryColor,
      boxShadow: [
        BoxShadow(
          blurRadius: 25,
          color: Colors.black.withOpacity(0.2),
          offset: Offset(0, 10),
        )
      ],
    ),
    child: Icon(
      floatingButtonIcon ?? Icons.add,
      color: Colors.white,
    ),
  ),
)

您可以使用GestureDetector代替TouchableOpacity库。

Answer 14

ClipOval(
      child: MaterialButton( 
      color: Colors.purple,
      padding: EdgeInsets.all(25.0),
      onPressed: () {},
      shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(30.0)),
            child: Text(
                      '1',
                      style: TextStyle(fontSize: 30.0),
                    ),
                  ),
                ),

Answer 15

您可以尝试一下，它是完全可定制的。

ClipOval(
  child: Material(
    color: Colors.blue, // button color
    child: InkWell(
      splashColor: Colors.red, // inkwell color
      child: SizedBox(width: 56, height: 56, child: Icon(Icons.menu)),
      onTap: () {},
    ),
  ),
)

输出：

Answer 16

试用此卡

04-16 18:11:25.699 : Error / CAPI_TELEPHONY ( 5724 : 5724 ) : telephony_common.c: telephony_init(473) > telephony feature is disabled
04-16 18:11:40.459 : Error / CAPI_TELEPHONY ( 5925 : 5925 ) : telephony_common.c: telephony_init(473) > telephony feature is disabled
04-16 18:11:40.611 : Error / CAPI_TELEPHONY ( 5925 : 5928 ) : telephony_common.c: telephony_init(473) > telephony feature is disabled
04-16 18:11:40.627 : Error / CAPI_TELEPHONY ( 5925 : 5928 ) : telephony_common.c: telephony_init(473) > telephony feature is disabled

Answer 17

您可以轻松地执行以下操作：

FlatButton(
      onPressed: () {

       },
      child: new Icon(
        Icons.arrow_forward,
        color: Colors.white,
        size: 20.0,
      ),
      shape: new CircleBorder(),
      color: Colors.black12,
    )

结果是

Answer 18

您还可以使用带有内部图像的RaisedButton（例如，用于社交登录）（需要使用带有fittebox的sizebox来将图像限制为指定大小）：

FittedBox(
    fit: BoxFit.scaleDown,
    child: SizedBox(
        height: 60,
        width: 60,
        child: RaisedButton(
             child: Image.asset(
                 'assets/images/google_logo.png'),
                 shape: StadiumBorder(),
                 color: Colors.white,
                     onPressed: () {},
                 ),
             ),
         ),

Answer 19

下面的代码将创建一个半径为 25 的圆，并在其中添加白色图标。如果用户还想拥有可以通过将 Container 小部件包装到 GestureDetector() 或 InkWell() 中来简单实现的点击方法。

Container(
height: 50,
width: 50,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(50 / 2),
),
child: Center(
child: Icon(
Icons.add,
color: Colors.white,
),
),
),

Answer 20

2021

如果您需要平面（无高度），因为 FlatButton 现在已弃用。

TextButton(
      onPressed: (){},
      child: Icon(Icons.arrow_back),
      style: ButtonStyle(
          backgroundColor: MaterialStateProperty.all(Colors.black26),
          shape: MaterialStateProperty.all(const CircleBorder())),
    );

如何在Flutter中创建圆圈图标按钮？

20 个答案:

2021