#鸿蒙通关秘籍#如何根据滑动动态地调整模糊效果？

@Entry
@Component
struct Index1 {
  @State radius: number = 0;
  @State text: string = '';
  @State y: string = '手指不在屏幕上';

  aboutToAppear() {
    this.text = "按住屏幕上下滑动\n" + "当前手指所在y轴位置 ： " + this.y +
    "\n" + "当前图片模糊程度为 : " + this.radius;
  }

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
      Text(this.text)
        .height(200)
        .fontSize(20)
        .fontWeight(FontWeight.Bold)
        .fontFamily("cursive")
        .fontStyle(FontStyle.Italic)
      Image($r("app.media.wall"))
        .blur(this.radius)
        .height('100%')
        .width("100%")
        .objectFit(ImageFit.Cover)
    }
    .height('100%')
    .width("100%")
    .onTouch((event?: TouchEvent) => {
      if(event) {
        if (event.type === TouchType.Move) {
          this.y = Number(event.touches[0].y.toString()).toString();
          this.radius = Number(this.y) / 10;
        }
        if (event.type === TouchType.Up) {
          this.radius = 0;
          this.y = '手指离开屏幕';
        }
      }
      this.text = "按住屏幕上下滑动\n" + "当前手指所在y轴位置 ： " + this.y +
      "\n" + "当前图片模糊程度为 : " + this.radius;
    })
  }
}
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