列表滑动惯性处理问题

class MyDataSource implements IDataSource {  
  private list: number[] = []  
  
  constructor(list: number[]) {  
    this.list = list  
  }  
  
  totalCount(): number {  
    return this.list.length  
  }  
  
  getData(index: number): number {  
    return this.list[index]  
  }  
  
  registerDataChangeListener(listener: DataChangeListener): void {  
  }  
  
  unregisterDataChangeListener() {  
  }  
}  
  
@Entry  
@Component  
struct SwiperExample {  
  private swiperController: SwiperController = new SwiperController()  
  private data: MyDataSource = new MyDataSource([])  
  @State myIndex: number = 1;  
  
  aboutToAppear(): void {  
    let list: number[] = []  
    for (let i = 1; i <= 10; i++) {  
      list.push(i);  
    }  
    this.data = new MyDataSource(list)  
  }  
  
  build() {  
    Column({ space: 5 }) {  
      Row({ space: 12 }) {  
        LazyForEach(this.data, (item: string, index: number) => {  
          Button((index + 1).toString())  
            .onClick(() => {  
              this.myIndex = index  
            })  
        })  
      }  
  
      Swiper(this.swiperController) {  
        LazyForEach(this.data, (item: string) => {  
          Text(item.toString())  
            .width('90%')  
            .height(160)  
            .backgroundColor(0xAFEEEE)  
            .textAlign(TextAlign.Center)  
            .fontSize(30)  
        }, (item: string) => item)  
      }  
      .cachedCount(2)  
      .index(this.myIndex)  
      .autoPlay(false)  
      .loop(true)  
      .duration(300)  
      .itemSpace(0)  
      .indicator(false)  
      .curve(Curve.Linear)  
      .onChange((index: number) => {  
        console.info("onChange:" + index.toString())  
        this.myIndex = index  
      })  
      .onGestureSwipe((index: number, extraInfo: SwiperAnimationEvent) => {  
        console.info("index: " + index)  
        console.info("current offset: " + extraInfo.currentOffset)  
      })  
      .onAnimationStart((index: number, targetIndex: number, extraInfo: SwiperAnimationEvent) => {  
        console.info("index: " + index)  
        console.info("targetIndex: " + targetIndex)  
        console.info("current offset: " + extraInfo.currentOffset)  
        console.info("target offset: " + extraInfo.targetOffset)  
        console.info("velocity: " + extraInfo.velocity)  
      })  
      .onAnimationEnd((index: number, extraInfo: SwiperAnimationEvent) => {  
        console.info("index: " + index)  
        console.info("current offset: " + extraInfo.currentOffset)  
      })  
    }.width('100%')  
    .margin({ top: 5 })  
  }  
}
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.