HarmonyOS 鸿蒙Next弹框如何排序啊？

https://developer.huawei.com/consumer/cn/doc/best-practices-V5/bpta-custome-dialog-development-practice-V5#section123081134286

从官方文档看， ArkUI自定义弹窗 （CustomDialog、promptAction）不支持层级管理，NavDestination Dialog 支持层级管理，可以看看这部分 能不能参考

@Entry
@Component
struct NavigationDiag {
  @Provide('NavPathStack') pageStack: NavPathStack = new NavPathStack()

  @Builder
  PagesMap(name: string) {
    if (name == 'DialogPage') {
      DialogPage()
    }
    else if (name == 'DialogPage2') {
      DialogPage2()
    }
  }


  build() {
    Column(){
      Text('Hello')
      Navigation(this.pageStack) {
        Button('Push DialogPage')
          .margin(20)
          .width('80%')
          .onClick(() => {
            this.pageStack.pushPathByName('DialogPage', '');
          })
      }
      .mode(NavigationMode.Stack)
      .title('Main')
      .navDestination(this.PagesMap)
    }
  }
}

@Component
export struct DialogPage {
  @Consume('NavPathStack') pageStack: NavPathStack;


  build() {
    NavDestination() {
      Stack({ alignContent: Alignment.Center }) {
        Column() {
          Text("Dialog NavDestination")
            .fontSize(20)
            .margin({ bottom: 100 })

          Button("Two Diaglog").onClick(()=>{
            this.pageStack.pushPathByName("DialogPage2",'')
          })

          Button("Close").onClick(() => {
            this.pageStack.pop()
          }).width('30%')
        }
        .justifyContent(FlexAlign.Center)
        .backgroundColor(Color.White)
        .borderRadius(10)
        .height('30%')
        .width('80%')
      }.height("100%").width('100%')
    }
    .zIndex(2)  //设置层级
    .backgroundColor('rgba(0,0,0,0.5)')
    .hideTitleBar(true)
    .mode(NavDestinationMode.DIALOG)
  }
}

@Component
export struct DialogPage2 {
  @Consume('NavPathStack') pageStack: NavPathStack;

  build() {
    NavDestination() {
      Stack({ alignContent: Alignment.Center }) {
        Column() {
          Text("Dialog2")
            .fontSize(20)
            .margin({ bottom: 100 })

          Button("Close").onClick(() => {
            this.pageStack.pop()
          }).width('30%')
        }
        .justifyContent(FlexAlign.Center)
        .backgroundColor(Color.White)
        .borderRadius(10)
        .height('60%')
        .width('80%')

      }.height("100%").width('100%')
    }
    .zIndex(1) //设置层级
    .margin({top: 10 })
    .backgroundColor('rgba(0,0,0,0.5)')
    .hideTitleBar(true)
    .mode(NavDestinationMode.DIALOG)
  }
}