HarmonyOS SideBarContainer使用问题

可以参考demo：

@Entry
@Component
struct SideBarContainerDemo {
  @State arr: number[] = [1, 2, 3]
  @State current: number = 1
  @State showSideBar: boolean = false
  @State showFlag: Visibility = Visibility.Hidden;

  // 延迟关闭侧边栏，让自定义的出场动画显示
  cancel() {
    this.showFlag = Visibility.Hidden
    setTimeout(() => {
      this.showSideBar = !this.showSideBar
    }, 1000)
  }

  build() {
    SideBarContainer(SideBarContainerType.Overlay) {
      Column() {
        ForEach(this.arr, (item: number) => {
          Column({ space: 5 }) {
            Text("Index0" + item )
              .fontSize(25)
              .fontColor(this.current === item ? '#0A59F7' : '#999')
              .fontFamily('source-sans-pro,cursive,sans-serif')
          }

          .onClick(() => {
            this.current = item
          })
        }, (item: string) => item)
      }
      .visibility(this.showFlag)
      .transition(TransitionEffect.OPACITY.animation({ duration: 1000 })
        .combine(TransitionEffect.translate({ x: 100 })))
      .width('100%')
      .justifyContent(FlexAlign.SpaceEvenly)
      .backgroundColor(Color.Pink)

      Column() {
        Button('打开侧边栏').onClick(() => {
          this.showFlag = Visibility.Visible
          this.showSideBar = true
        }
        )
        Button('关闭侧边栏').onClick(() => {
          this.cancel()
        })
      }
    }
    .divider(null)
    .sideBarPosition(SideBarPosition.End)
    .showSideBar(this.showSideBar)
    .showControlButton(false)
    .sideBarWidth(150)
    .minSideBarWidth(50)
    .maxSideBarWidth(300)
    .minContentWidth(0)
    .onChange((value: boolean) => {
      console.info('status:' + value)
    })
  }
}
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