HarmonyOS 如何删除数组中的某一个item，删除后同步刷新UI

删除list中的item刷新list中的ui可以使用@State来实现，参考示例：

@Entry
@Component
struct Index {
  @State arr: number[] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

  build() {
    Column() {
      List({ space: 20, initialIndex: 0 }) {
        ForEach(this.arr, (item: number) => {
          ListItem() {
            Text('' + item)
              .width('100%')
              .height(100)
              .fontSize(16)
              .textAlign(TextAlign.Center)
              .borderRadius(10)
              .backgroundColor(0xFFFFFF)
          }
        }, (item: string) => item)
      }
      .width('90%')
      .height('90%')
      .scrollBar(BarState.Off)
      .onDidScroll((scrollOffset: number, scrollState: ScrollState) => {
        console.info(`onScroll scrollState = ScrollState` + scrollState + `, scrollOffset = ` + scrollOffset)
      })
      .onScrollIndex((firstIndex: number, lastIndex: number, centerIndex: number) => {
        console.info('onScroll first' + firstIndex)
        console.info('onScroll last' + lastIndex)
        console.info('onScroll center' + centerIndex)
      })

      Button("test").height('10%').onClick(() => {
        this.arr.pop();
      })
      //Search().height('5%')
    }
    .height('100%')
    .width('100%')
  }
}