HarmonyOS Grid拖拽到边缘Grid无法自动滚屏

import Curves from '@ohos.curves'  
  
@Entry  
@Component  
struct GridExample {  
  @State numbers: string[] = []  
  scroller: Scroller = new Scroller()  
  @State text: string = 'drag'  
  @State currentIndex: number = 0  
  @State startIndex: number = 0  
  @State endIndex: number = 0  
  @Builder pixelMapBuilder() { //拖拽过程样式  
    Column() {  
      Text(this.text)  
        .fontSize(16)  
        .backgroundColor(0xF9CF93)  
        .width(80)  
        .height(80)  
        .textAlign(TextAlign.Center)  
    }  
  }  
  aboutToAppear() {  
    for (let i = 1;i <= 15; i++) {  
      this.numbers.push(i + '')  
    }  
  }  
  changeIndex(index1: number, index2: number) { //交换数组位置  
    let temp: string;  
    temp = this.numbers[index1];  
    this.numbers[index1] = this.numbers[index2];  
    this.numbers[index2] = temp;  
  }  
  build() {  
    Column({ space: 5 }) {  
      Grid(this.scroller) {  
        ForEach(this.numbers, (day: string) => {  
          GridItem() {  
            Text(day)  
              .fontSize(16)  
              .backgroundColor(0xF9CF93)  
              .width(80)  
              .height(80)  
              .textAlign(TextAlign.Center)  
          }  
        })  
      }  
      .columnsTemplate('1fr 1fr 1fr')  
      .columnsGap(10)  
      .rowsGap(10)  
      .width('90%')  
      .backgroundColor(0xFAEEE0)  
      .height(300)  
      .editMode(true) //设置Grid是否进入编辑模式，进入编辑模式可以拖拽Grid组件内部GridItem  
      .onScrollIndex((start: number, end: number) => {  
        console.log(start=${start})  
        console.log(end=${end})  
        this.startIndex = start  
        this.endIndex = end  
      })  
      .onItemDragStart((event: ItemDragInfo, itemIndex: number) => { //第一次拖拽此事件绑定的组件时，触发回调。  
        this.text = this.numbers[itemIndex]  
        this.currentIndex = itemIndex  
        return this.pixelMapBuilder() //设置拖拽过程中显示的图片。  
      })  
      .onItemDrop((event: ItemDragInfo, itemIndex: number, insertIndex: number, isSuccess: boolean) => { //绑定此事件的组件可作为拖拽释放目标，当在本组件范围内停止拖拽行为时，触发回调。  
        // isSuccess=false时，说明drop的位置在grid外部；insertIndex > length时，说明有新增元素的事件发生  
        if (!isSuccess || insertIndex >= this.numbers.length) {  
          return  
        }  
        console.info('beixiang' + itemIndex + '', insertIndex + '') //itemIndex拖拽起始位置，insertIndex拖拽插入位置  
        this.changeIndex(itemIndex, insertIndex)  
      })  
      .onItemDragMove((event: ItemDragInfo, itemIndex: number, insertIndex: number) => {  
        console.log(insertIndex=${insertIndex})  
        if (insertIndex <= this.startIndex + 2 && insertIndex > 2) {  
          let curve = Curves.interpolatingSpring(10, 1, 228, 30) //创建一个阶梯曲线  
          const yOffset: number = this.scroller.currentOffset().yOffset;  
           this.scroller.scrollTo({ xOffset: 0, yOffset: yOffset - 55, animation: { duration: 1000, curve: curve } })  
        }  
        if (insertIndex >= this.endIndex - 2 && insertIndex < this.numbers.length - 1) {  
          let curve = Curves.interpolatingSpring(10, 1, 228, 30) //创建一个阶梯曲线  
          const yOffset: number = this.scroller.currentOffset().yOffset;  
          this.scroller.scrollTo({ xOffset: 0, yOffset: yOffset + 55, animation: { duration: 1000, curve: curve } })  
        }  
      })  
    }.width('100%').margin({ top: 5 })  
  }  
}