HarmonyOS 鸿蒙Next Grid控件拖拽子组件交互位置，当拖拽到可见组件底部后，不能自动滑动下去

您可以参考下方demo来实现自己的业务，demo如下：

import Curves from '[@ohos](/user/ohos).curves'

[@Entry](/user/Entry)

[@Component](/user/Component)

struct GridExample {

 [@State](/user/State) numbers: string[] = []

 scroller: Scroller = new Scroller()

 [@State](/user/State) text: string = 'drag'

 [@State](/user/State) currentIndex: number = 0

 [@State](/user/State) startIndex: number = 0

 [@State](/user/State) endIndex: number = 0

 [@Builder](/user/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) => {

       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) => {

       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: 100, 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: 100, curve: curve } })

       }

     })

   }.width('100%').margin({ top: 5 })

 }

}