HarmonyOS鸿蒙Next中SwipeGesture如何判断手势上下左右四大方向

@Entry
@Component
struct test {
  @State screenStartX: number = 0
  @State screenStartY: number = 0
  @State lastScreenX: number = 0
  @State lastScreenY: number = 0

  build() {
    Column() {
      Column() {}
      .border({ width: 3 })
      .width(300)
      .height(200)
      .margin(100)
      .onTouch((e) => {
        if (e.type === TouchType.Down && e.touches.length > 0) { // 触摸开始，记录初始位置
          this.screenStartX = e.touches[0].screenX;
          this.screenStartY = e.touches[0].screenY;
        } else if (e.type === TouchType.Up && e.changedTouches.length > 0) { // 当手指抬起时，更新最后的位置
          this.lastScreenX = e.changedTouches[0].screenX;
          this.lastScreenY = e.changedTouches[0].screenY;
        }
      })
      .gesture(
        SwipeGesture({ direction: SwipeDirection.All }) //支持方向中 all可以是上下左右
          .onAction((event: GestureEvent) => {
            const swipeX = this.lastScreenX - this.screenStartX;
            const swipeY = this.lastScreenY - this.screenStartY;

            // 判断滑动方向
            let directionText = '';
            if (Math.abs(swipeX) > Math.abs(swipeY)) {
              if (swipeX > 0) {
                directionText = 'Right'; // 向右滑动
              } else {
                directionText = 'Left'; // 向左滑动
              }
            } else {
              if (swipeY > 0) {
                directionText = 'Down'; // 向下滑动
              } else {
                directionText = 'Up'; // 向上滑动
              }
            }

            console.info('====滑动方向:', directionText);
            // console.info('====起点x:', this.screenStartX);
            // console.info('====起点y:', this.screenStartY);
            // console.info('====终点x:', this.lastScreenX);
            // console.info('====终点y:', this.lastScreenY);

            // 清除开始位置记录，准备下一次滑动判断
            this.screenStartX = 0;
            this.screenStartY = 0;
          })
      )
    }.width('100%')
  }
}