HarmonyOS 手势监听

可以通过组件的onTouch事件来监听手动滑动，并通过改变组件的translate的值来移动组件

@Entry
@Component
struct Page1 {
  @State translatey: number = 300
  InitialPosition: number = 0

  onTouchEvent(event: TouchEvent): void {
    switch (event.type) {
    //手指按下事件
      case TouchType.Down: {
        //记录手指摁下时所在的位置
        this.InitialPosition = event.touches[0].windowY
      }
    //手指按住移动
      case TouchType.Move: {
        this.translatey = this.translatey as number - (this.InitialPosition - event.touches[0].windowY)
        this.InitialPosition = event.touches[0].windowY
      }
    //手指抬起
      case TouchType.Up: {
      }
    }
  }

  build() {
    Column() {
      Column() {

      }
      .width('100%')
      .height(500)
      .backgroundColor(Color.Yellow)
      .translate({ y: this.translatey })
      .onTouch((event: TouchEvent) => {
        this.onTouchEvent(event)
      })
    }
    .justifyContent(FlexAlign.End)
    .height('100%')
    .width('100%')
    .backgroundColor(Color.Grey)
  }
}