harmony 鸿蒙Z-order Control

2022-08-09
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Z-order Control

The zIndex attribute sets the z-order of a component in the stacking context.

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	Type	Description
zIndex	number	Hierarchy of sibling components in a container. A larger value indicates a higher display level. Since API version 9, this API is supported in ArkTS widgets.

Example

// xxx.ets
@Entry
@Component
struct ZIndexExample {
  build() {
    Column() {
      Stack() {
        // Components are stacked. By default, the component defined later is on the top. A component with a larger zIndex value is displayed before one with a smaller zIndex value.
        Text('1, zIndex(2)')
          .size({ width: '40%', height: '30%' }).backgroundColor(0xbbb2cb)
          .zIndex(2)
        Text('2, default zIndex(1)')
          .size({ width: '70%', height: '50%' }).backgroundColor(0xd2cab3).align(Alignment.TopStart)
          .zIndex(1)
        Text('3, zIndex(0)')
          .size({ width: '90%', height: '80%' }).backgroundColor(0xc1cbac).align(Alignment.TopStart)
      }.width('100%').height(200)
    }.width('100%').height(200)
  }
}

Display of child components in the <Stack> component when zIndex is not set