HarmonyOS uiContext.getPromptAction().openCustomDialog 能实现打开一个页面级的弹窗吗

目前没有组件能直接实现这种效果，可以模拟弹窗效果来实现：参考demo如下：

import router from '@ohos.router';

@Entry
@Component
struct Index {
  @State textValue: string = 'Hello World'
  @State visible: Visibility = Visibility.None

  build() {
    Stack() {
      Row() {
        Column() {
          Text('Hello World')
            .fontSize(50)
            .fontWeight(FontWeight.Bold)
          Button('click')
            .onClick(() => {
              console.log("hit me!")
              if (this.visible == Visibility.Visible) {
                this.visible = Visibility.None
              } else {
                this.visible = Visibility.Visible
              }
            })
            .backgroundColor(0x777474)
            .fontColor(0x000000)
        }
        .width('100%')
      }
      .height('100%')
      .backgroundColor("#36D")
      Column() {
        GridRow({
          columns:{xs:1 ,sm: 4, md: 8, lg: 12},
          breakpoints: { value: ["400vp", "600vp", "800vp"],
            reference: BreakpointsReference.WindowSize },
        })
        {
          GridCol({
            span:{xs:1 ,sm: 2, md: 4, lg: 8},
            offset:{xs:0 ,sm: 1, md: 2, lg: 2}
          })
         }
       }
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