HarmonyOS 自定义弹窗控制问题

参考示例如下：

@Entry
@Component
struct Index60 {
  @State message: string = '请点击';
  citySelectorDialogController: CustomDialogController = new CustomDialogController({
    builder: CustomDialogWidget(),
    alignment: DialogAlignment.Center,
    customStyle: true
  })

  build() {
    Column() {
      Text(this.message)
        .fontSize(40)
    }
    .width('100%')
    .height('100%')
    .onClick(() => {
      this.citySelectorDialogController.open()
    })
  }
}

@CustomDialog
export default struct CustomDialogWidget {
  controller: CustomDialogController

  build() {
    Column() {
      Text('這個是弹窗')
        .fontSize(40)
    }.width(300)
    .height(300)
    .backgroundColor(Color.Red)
    .onClick(() => {
      if (this.controller) {
        this.controller.close()
      }
    })
  }
}