ImageAnimator

The <ImageAnimator> component enables images to be played frame by frame. The list of images to be played can be configured, and the duration of each image can be configured.

NOTE

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

Required Permissions

None

Child Components

Not supported

APIs

ImageAnimator()

Attributes

Name Type Default Value Mandatory Description
images Array<{
src: string,
width?: number | string,
height?: number | string,
top?: number | string,
left?: number | string,
duration?: number
}>		 [] Yes Image frame information. The information of each frame includes the image path, image size, image position, and image playback duration. The detailed description is as follows:
src: image path. The image format can be SVG, PNG, or JPG.
width: image width.
height: image height.
top: vertical coordinate of the image relative to the upper left corner of the component.
left: horizontal coordinate of the image relative to the upper left corner of the component.
duration: playback duration of the image, in ms.
state AnimationStatus Initial No Playback status of the animation. The default status is Initial.
duration number 1000 No Playback duration, in ms. The default duration is 1000 ms. When the duration is 0, no image is played. The value change takes effect only at the beginning of the next cycle. When a separate duration is set in images, the setting of this attribute is invalid.
reverse boolean false No Playback sequence. The value false indicates that images are played from the first one to the last one, and true indicates that images are played from the last one to the first one.
fixedSize boolean true No Whether the image size is the same as the component size.
true: The image size is the same as the component size. In this case, the width, height, top, and left attributes of the image are invalid.
false: The width, height, top, and left attributes of each image must be set separately.
preDecode number 0 No Whether to enable pre-decoding. The default value 0 indicates that pre-decoding is disabled. The value 2 indicates that two images following the currently playing frame will be cached in advance to improve performance.
fillMode FillMode Forwards No Status before and after the animation starts. For details about the options, see FillMode.
iterations number 1 No Number of times that the animation is played. By default, the animation is played once. The value -1 indicates that the animation is played for an unlimited number of times.

Events

Name Description
onStart(event: () => void) Triggered when the animation starts to play.
onPause(event: () => void) Triggered when the animation playback is paused.
onRepeat(event: () => void) Triggered when the animation playback is repeated.
onCancel(event: () => void) Triggered when the animation playback is canceled.
onFinish(event: () => void) Triggered when the animation playback is complete.

Example

// xxx.ets
@Entry
@Component
struct ImageAnimatorExample {
  @State state: AnimationStatus = AnimationStatus.Initial
  @State reverse: boolean = false
  @State iterations: number = 1

  build() {
    Column({ space:5 }) {
      ImageAnimator()
        .images([
          { 
            // The comment folder is at the same level as the pages folder.
            src: '/comment/bg1.jpg',
            duration: 500,
            width: 325,
            height: 200,
            top: 0,
            left: 0
          },
          {
            src: '/comment/bg2.jpg',
            duration: 500,
            width: 325,
            height: 200,
            top: 0,
            left: 0
          },
          {
            src: '/comment/bg3.jpg',
            duration: 500,
            width: 325,
            height: 200,
            top: 0,
            left: 0
          },
          {
            src: '/comment/bg4.jpg',
            duration: 500,
            width: 325,
            height: 200,
            top: 0,
            left: 0
          }
        ])
        .state(this.state).reverse(this.reverse).fixedSize(false).preDecode(2)
        .fillMode(FillMode.None).iterations(this.iterations).width(325).height(210)
        .margin({top:100})
        .onStart(() => { // Triggered when the frame animation playback starts.
          console.info('Start')
        })
        .onPause(() => {
          console.info('Pause')
        })
        .onRepeat(() => {
          console.info('Repeat')
        })
        .onCancel(() => {
          console.info('Cancel')
        })
        .onFinish(() => { // Triggered after the frame animation playback is complete.
          console.info('Finish')
        })
      Row() {
        Button('start').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Running
        })
        Button('pause').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Paused
        })
        Button('stop').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Stopped
        })
      }
      Row() {
        Button('reverse').width(100).padding(5).onClick(() => {
          this.reverse = !this.reverse
        })
        Button('once').width(100).padding(5).onClick(() => {
          this.iterations = 1
        })
        Button('iteration').width(100).padding(5).onClick(() => {
          this.iterations = -1
        })
      }
    }.width('100%').height('100%').backgroundColor(0xF1F3F5)
  }
}

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