HarmonyOS 鸿蒙Next遇到class constructor cannot called without 'new'，但检查后并没有发现缺少new的关键字

HarmonyOS 鸿蒙Next遇到class constructor cannot called without ‘new’，但检查后并没有发现缺少new的关键字

import { CommonConstants } from '../../common/constants/CommonConstants'
import DateUtil from '../../common/utils/DateUtil'
import DatepickDialog from './DatePickDialog'
@Component
export  default struct StaticCard {
  @StorageProp('selectedDate') selectedDate:number=DateUtil.beginTimeOfDay(new Date())

  controller:CustomDialogController= new CustomDialogController({
    builder:DatepickDialog({selectedDate:new Date(this.selectedDate)})
  })
  build() {
    Column(){
    //1.日期
      Row(){
        Text(DateUtil.formatDate(this.selectedDate)).fontColor($r('app.color.secondary_color'))
        Image($r('app.media.ic_public_spinner')).width(20).fillColor($r('app.color.secondary_color'))

      }.padding(CommonConstants.SPACE_8)
      //2.统计信息
      .onClick(()=>{
        this.controller.open()
      })
    }
    .width(CommonConstants.THOUSANDTH_940)
    .backgroundColor($r('app.color.stats_title_bgc'))
    .borderRadius(CommonConstants.DEFAULT_18)
  }
}

import { CommonConstants } from '../../common/constants/CommonConstants'
@Component
export  default struct DatepickDialog {
  controller:CustomDialogController
  selectedDate:Date=new Date()
  build() {
    Column({space:CommonConstants.SPACE_12}){
      //1.日期选择
      DatePicker({
        start: new Date('2020-01-01'),
        end: new Date(),
        selected: this.selectedDate
      })
        .onChange((value: DatePickerResult) => {
          this.selectedDate.setFullYear(value.year, value.month, value.day)

        })
      //2.按钮
      Row({space:CommonConstants.SPACE_12}){
        Button('取消').width(120).backgroundColor($r('app.color.light_gray'))
          .onClick(()=>{
            this.controller.close()
          })
        Button('提交').width(120).backgroundColor($r('app.color.primary_color'))
          .onClick(()=>{
            //1.保存日期到全局
            AppStorage.SetOrCreate('selectedDate',this.selectedDate.getTime())
          this.controller.close()
          })
      }

    }.padding(CommonConstants.SPACE_12)
    }

}

为什么在调用

controller: CustomDialogController = new CustomDialogController({ builder: DatePickDialog({selectedDate: new Date(this.selectedDate)}) })后，我的日期组件就消失了，在preview里面不显示，注解掉这段就正常了，log里面报错class constructor cannot called without ‘new’