HarmonyOS 组件内转场动画，如何用条件控制是否进行转场动画

示例参考如下：

@Component
struct DemoPage {
  @State animated: boolean = true
  @State show: boolean = false
  build() {
    NavDestination() {
      Column() {
        if (this.show) {
          Column()
            .width('60%')
            .height(50)
            .backgroundColor(Color.Red)
            .transition(this.animated
              ?
            TransitionEffect.OPACITY.animation({ duration: 1000 })
              :
            TransitionEffect.OPACITY.animation({ duration: 0 }).combine(TransitionEffect.IDENTITY)
            )
        }

        Button('需要动画-显示')
          .margin({ top: 50 })
          .onClick(() => {
            this.show = true
            this.animated = true
          })

        Button('需要动画-隐藏')
          .margin({ top: 50 })
          .onClick(() => {
            this.show = false
            this.animated = true
          })

        Button('不需要动画-显示')
          .margin({ top: 50 })
          .onClick(() => {
            this.show = true
            this.animated = false
          })

        Button('不需要动画-隐藏')
          .margin({ top: 50 })
          .onClick(() => {
            this.show = false
            this.animated = false
          })

      }
      .width('100%')
      .height('100%')
    }.hideTitleBar(true)
  }
}