#鸿蒙通关秘籍#如何在HarmonyOS NEXT中防止触摸事件冒泡

在HarmonyOS NEXT开发中，当子组件触发触摸事件时，为了防止父组件的触摸事件也被触发，可以在子组件的onTouch回调中调用event.stopPropagation()来阻止事件冒泡。具体代码如下：

@Component
struct TouchEvent {
  @Consume isEnabled: boolean;
  @State parentCompResponseTimes: number = 0;
  @State childCompResponseTimes: number = 0;

  build() {
    Column() {
      Text("触摸事件阻止冒泡示例")
        .width('90%')
        .textAlign(TextAlign.Start)
      Column() {
        Text("父组件")
          .margin('10px')
        Row() {
          Text("父组件响应次数: ")
          Text(`${this.parentCompResponseTimes}`)
        }
        .margin({
          top: '10px',
          bottom: '10px'
        })

        Row() {
          Text("子组件响应次数: ")
          Text(`${this.childCompResponseTimes}`)
        }.margin({ bottom: '10px' })

        Text("子组件")
          .width(200)
          .height(50)
          .borderRadius(10)
          .fontColor(Color.White)
          .textAlign(TextAlign.Center)
          .backgroundColor('#0000FF')
          .onTouch((event) => {
            if (this.isEnabled) {
              event.stopPropagation();
            }
            this.childCompResponseTimes++;
          })
      }
      .width('90%')
      .height(150)
      .margin({ top: '20px' })
      .backgroundColor('#F0F0F0')
      .borderRadius(10)
      .alignItems(HorizontalAlign.Center)
      .onTouch(() => {
        this.parentCompResponseTimes++;
      })
    }
    .margin({ top: '30px' })
  }
}