harmony 鸿蒙Shared Element Transition

2022-08-09
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Shared Element Transition

A shared element transition is a transition animation applied to a component that is present on two pages. This component is called the shared element and can be set in the sharedTransition attribute.

NOTE

The APIs of this module are supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Attributes

Name	Parameter	Description
sharedTransition	id: string, { duration?: number, curve?: Curve \|string \|ICurve¹⁰⁺, delay?: number, motionPath?: { path: string, form?: number, to?: number, rotatable?: boolean }, zIndex?: number, type?: SharedTransitionEffectType }	Transition of the shared element. If the same id value is configured for a component on the two pages, this component is considered as a shared element of the pages. If the id value is an empty string, no transition will be applied to the component. - id: component ID. - duration: animation duration. Default value: 1000 Unit: ms Value range: [0, +∞) The value 0 indicates that no animation is applied. A value less than 0 evaluates to the default value 1000. - curve: animation curve. The default curve is Curve.Linear. - delay: animation delay. Default value: 0 Unit: ms Value range: [0, +∞) A value less than 0 evaluates to the value 0. - motionPath: motion path information. For details, see Motion Path Animation. - path: path. - from: start value. - to: end value. - rotatable: whether to rotate. - zIndex: z-axis. - type: animation type.

Example

This example implements the custom transition of a shared image during redirection from one page to another, which is triggered by a click on the image.

// xxx.ets
@Entry
@Component
struct SharedTransitionExample {
  @State active: boolean = false

  build() {
    Column() {
      Navigator({ target: 'pages/PageB', type: NavigationType.Push }) {
        Image($r('app.media.ic_health_heart')).width(50).height(50)
          .sharedTransition('sharedImage', { duration: 800, curve: Curve.Linear, delay: 100 })
      }.padding({ left: 20, top: 20 })
      .onClick(() => {
        this.active = true
      })
    }
  }
}

// PageB.ets
@Entry
@Component
struct pageBExample {
  build() {
    Stack() {
      Image($r('app.media.ic_health_heart')).width(150).height(150)
        .sharedTransition('sharedImage', { duration: 800, curve: Curve.Linear, delay: 100 })
    }.width('100%').height('100%')
  }
}

shared