浮层

// xxx.ets
@Entry
@Component
struct OverlayExample {
  build() {
    Column() {
      Column() {
        Text('floating layer')
          .fontSize(12).fontColor(0xCCCCCC).maxLines(1)
        Column() {
          Image($r('app.media.img'))
            .width(240).height(240)
            .overlay("Winter is a beautiful season, especially when it snows.", {
              align: Alignment.Bottom,
              offset: { x: 0, y: -15 }
            })
        }.border({ color: Color.Black, width: 2 })
      }.width('100%')
    }.padding({ top: 20 })
  }
}

// xxx.ets
@Entry
@Component
struct OverlayExample {
  @Builder OverlayNode() {
    Column() {
      Image($r('app.media.img1'))
      Text("This is overlayNode").fontSize(20).fontColor(Color.White)
    }.width(180).height(180).alignItems(HorizontalAlign.Center)
  }

  build() {
    Column() {
      Image($r('app.media.img2'))
        .overlay(this.OverlayNode(), { align: Alignment.Center })
        .objectFit(ImageFit.Contain)
    }.width('100%')
    .border({ color: Color.Black, width: 2 }).padding(20)
  }
}