自定义事件拦截

// xxx.ets
@Entry
@Component
struct Index {
  isPolygon(event: TouchEvent) {
    return true;
  }

  build() {
    Row() {
      Column() {
        Text('hello world')
          .backgroundColor(Color.Blue)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            console.info('Text click');
          })
      }
      .width(400)
      .height(300)
      .backgroundColor(Color.Pink)
      .onClick(() => {
        console.info('Column click');
      })
      // 调用onTouchIntercept修改该组件的HitTestMode属性
      .onTouchIntercept((event: TouchEvent) => {
        console.info('OnTouchIntercept + ' + JSON.stringify(event));
        // 使用touches时需要先校验是否为空
        if (event && event.touches) {
          let touches = event.touches;
          for (let i = 0; touches[i] != null; i++) {
            console.info('onTouchIntercept touches:', JSON.stringify(touches[i]));
          }
        }
        // 当满足自定义拦截条件时，返回HitTestMode.None使该组件不参与触摸测试
        if (this.isPolygon(event)) {
          return HitTestMode.None;
        }
        return HitTestMode.Default;
      })
    }
    .width('100%')
  }
}