HarmonyOS 自定义弹框-点击按钮调用方法崩溃

cancel: ()=> { this.onCancel() }, 
    confirm: ()=> { this.onAccept() },
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@CustomDialog 
struct CustomDialogExample { 
  controller: CustomDialogController 
  cancel: () => void = () =>{ 
 
  } 
  confirm: () => void = () => { 
 
  } 
 
  build() { 
    Column() { 
      Text('我是内容').fontSize(20).margin({ top: 10, bottom: 10 }) 
      Flex({ justifyContent: FlexAlign.SpaceAround }) { 
        Button('cancel') 
          .onClick(() => { 
            this.controller.close() 
            this.cancel() 
          }).backgroundColor(0xffffff).fontColor(Color.Black) 
        Button('confirm') 
          .onClick(() => { 
            this.controller.close() 
            this.confirm() 
          }).backgroundColor(0xffffff).fontColor(Color.Red) 
      }.margin({ bottom: 10 }) 
    } 
  } 
} 
 
@Entry 
@Component 
struct DialogExample { 
  dialogController: CustomDialogController = new CustomDialogController({ 
    builder: CustomDialogExample({ 
      // cancel: this.onCancel, 
      // confirm: this.onAccept, 
 
      cancel: ()=> { this.onCancel() }, 
      confirm: ()=> { this.onAccept() }, 
    }), 
    alignment: DialogAlignment.Default,  // 可设置dialog的对齐方式，设定显示在底部或中间等，默认为底部显示 
  }) 
  onCancel() { 
    console.info('Callback when the first button is clicked') 
  } 
  onAccept(){ 
    console.info('Callback when the second button is clicked') 
    this.tes3t() 
  } 
  tes3t(){ 
    console.info('test when the second button is clicked') 
  } 
  build() { 
    Flex({ justifyContent: FlexAlign.Center }) { 
      Button('click me') 
        .onClick(() => { 
          this.dialogController.open() 
 
        }) 
    }.width('100%') 
  } 
}
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