HarmonyOS CustomDialogController如何弹出半屏弹窗

1.可以设置 弹窗遮蔽层区域，在遮蔽层区域内的事件不透传，在遮蔽层区域外的事件透传。<br>2.可以将弹窗组件的蒙层属性isModal设为false，自定义蒙层并通过Visibility控制显隐，使用hitTestBehavior(HitTestMode.None)可以实现自身不响应触摸测试。样例demo

@CustomDialog
struct MyDialog {
  // 显隐控制设置为不占用
  @Link visible: Visibility
  controller1: CustomDialogController
  build() {
    Row() {
      Column({ space: 10 }) {
        Text('自定义弹窗').fontSize(25).fontColor(Color.Blue)
        Flex({ justifyContent: FlexAlign.SpaceAround }) {
          Button('取消').onClick(() => {
            this.controller1.close()
            this.visible=Visibility.None
          }).backgroundColor(0xffffff).fontColor(Color.Black)
          Button('确认').onClick(() => {
            this.controller1.close()
            this.visible=Visibility.None
          }).backgroundColor(0xffffff).fontColor(Color.Black)
        }.width("100%")
      }.width("100%")
    }.height(100)
  }
}
@Entry
@Component
struct Index {
  @State visible: Visibility = Visibility.None
  private arr: number[] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  dialogController1: CustomDialogController = new CustomDialogController({
    builder: MyDialog({
      visible: this.visible
    }), offset: {dx: 0, dy: 0},
    // 是否允许点击遮障层退出
    autoCancel: false,
    //设置窗口无蒙层
    isModal:false,
  })
  build() {
    Column({ space: 10 }) {
      Button('打开弹窗').onClick(() => {
        this.dialogController1.open()
        this.visible=Visibility.Visible
      })
      List(){
        ForEach(this.arr,(item:number)=>{
          ListItem(){Row(){Text('文本')}.justifyContent(FlexAlign.Center).width('100%').backgroundColor(0xFFFFFF).height(100)}
        })
      }.divider({strokeWidth:2,color:'#F1F3F5'}).height('90%')
      Column().width('100%').height('100%').position({x:0, y:0}).zIndex(10).backgroundColor(0x33000000).visibility(this.visible).hitTestBehavior(HitTestMode.None)
    }.width("100%")
  }
}