Button

The <Button> component can be used to create different types of buttons.

NOTE

This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

This component can contain only one child component.

APIs

Button

Button(options: ButtonOptions)

Creates a button that can contain a single child component.

Widget capability: Since API version 9, this API is supported in ArkTS widgets.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Button

Button(label: ResourceStr, options?: ButtonOptions)

Creates a button component based on text content. In this case, the component cannot contain child components.

Widget capability: Since API version 9, this API is supported in ArkTS widgets.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

ButtonOptions

Attributes

In addition to the universal attributes, the following attributes are supported.

ButtonType

Since API version 9, this API is supported in ArkTS widgets.

NOTE

• The rounded corner of a button is set by using borderRadius, rather than by using the border API. Only a rounded corner whose parameter is Length is supported.
• For a button of the Capsule type, the borderRadius settings do not take effect, and the radius of its rounded corner is always half of the button height or width, whichever is smaller.
• For a button of the Circle type: (1) If both its width and height are set, borderRadius does not take effect, and the button radius is half of the width or height (whichever is smaller). (2) If either its width or height is set, borderRadius does not take effect, and the button radius is half of the set width or height. (3) If neither its width nor height is set, the button radius is as specified by borderRadius; if borderRadius is set to a negative value, the value 0 will be used.
• The button text is set using the text style attributes.
• Before setting the gradient color, you need to set backgroundColor to transparent.

LabelStyle¹⁰⁺

Events

The universal events are supported.

Example

Example 1

// xxx.ets
@Entry
@Component
struct ButtonExample {
  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start, justifyContent: FlexAlign.SpaceBetween }) {
      Text('Normal button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
        Button('OK', { type: ButtonType.Normal, stateEffect: true })
          .borderRadius(8)
          .backgroundColor(0x317aff)
          .width(90)
          .onClick(() => {
            console.log('ButtonType.Normal')
          })
        Button({ type: ButtonType.Normal, stateEffect: true }) {
          Row() {
            LoadingProgress().width(20).height(20).margin({ left: 12 }).color(0xFFFFFF)
            Text('loading').fontSize(12).fontColor(0xffffff).margin({ left: 5, right: 12 })
          }.alignItems(VerticalAlign.Center)
        }.borderRadius(8).backgroundColor(0x317aff).width(90).height(40)

        Button('Disable', { type: ButtonType.Normal, stateEffect: false }).opacity(0.4)
          .borderRadius(8).backgroundColor(0x317aff).width(90)
      }

      Text('Capsule button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
        Button('OK', { type: ButtonType.Capsule, stateEffect: true }).backgroundColor(0x317aff).width(90)
        Button({ type: ButtonType.Capsule, stateEffect: true }) {
          Row() {
            LoadingProgress().width(20).height(20).margin({ left: 12 }).color(0xFFFFFF)
            Text('loading').fontSize(12).fontColor(0xffffff).margin({ left: 5, right: 12 })
          }.alignItems(VerticalAlign.Center).width(90).height(40)
        }.backgroundColor(0x317aff)

        Button('Disable', { type: ButtonType.Capsule, stateEffect: false }).opacity(0.4)
          .backgroundColor(0x317aff).width(90)
      }

      Text('Circle button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, wrap: FlexWrap.Wrap }) {
        Button({ type: ButtonType.Circle, stateEffect: true }) {
          LoadingProgress().width(20).height(20).color(0xFFFFFF)
        }.width(55).height(55).backgroundColor(0x317aff)

        Button({ type: ButtonType.Circle, stateEffect: true }) {
          LoadingProgress().width(20).height(20).color(0xFFFFFF)
        }.width(55).height(55).margin({ left: 20 }).backgroundColor(0xF55A42)
      }
    }.height(400).padding({ left: 35, right: 35, top: 35 })
  }
}

Example 2

// xxx.ets
@Entry
@Component
struct SwipeGestureExample {
  @State count: number = 0

  build() {
    Column() {
      Text(`${this.count}`)
        .fontSize(30)
        .onClick(() => {
          this.count++
        })
      if (this.count <= 0) {
        Button('count is negative').fontSize(30).height(50)
      } else if (this.count % 2 === 0) {
        Button('count is even').fontSize(30).height(50)
      } else {
        Button('count is odd').fontSize(30).height(50)
      }
    }.height('100%').width('100%').justifyContent(FlexAlign.Center)
  }
}

Example 3

// xxx.ets
@Entry
@Component
struct buttonTestDemo {
  @State txt: string = 'overflowTextOverlengthTextOverflow.Clip';
  @State widthShortSize: number = 200;

  build() {
    Row() {
      Column() {
        Button(this.txt)
          .width(this.widthShortSize)
          .height(100)
          .labelStyle({ overflow: TextOverflow.Clip,
            maxLines: 1,
            minFontSize: 20,
            maxFontSize: 20,
            font: {
              size: 20,
              weight: FontWeight.Bolder,
              family: 'cursive',
              style: FontStyle.Italic
            }
          })
          .fontSize(40)
      }
      .width('100%')
    }
    .height('100%')
  }
}