HarmonyOS NEXT 自定义 Dialog this.controller.close() 关闭失败或 undefined ?

Question

HarmonyOS NEXT 自定义 Dialog this.controller.close() 关闭失败或 undefined ?

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Answer 1

请参考demo：

@CustomDialog 
struct CustomDialogExample { 
  controller?: CustomDialogController 
  cancel: () => void = () => { 
  } 
  confirm: () => void = () => { 
  } 
 
  build() { 
    Column() { 
      Text('可展示在主窗口外的弹窗') 
        .fontSize(30) 
        .height(100) 
      Button('点我关闭弹窗') 
        .onClick(() => { 
          if (this.controller != undefined) { 
            this.controller.close() 
            console.log('关闭成功') 
          } else { 
            console.log('关闭失败') 
          } 
        }) 
        .margin(20) 
    } 
  } 
} 
 
@Entry 
@Component 
struct CustomDialogUser { 
  dialogController: CustomDialogController | null = new CustomDialogController({ 
    builder: CustomDialogExample({ 
      cancel: () => { 
        this.onCancel() 
      }, 
      confirm: () => { 
        this.onAccept() 
      } 
    }), 
    cancel: this.existApp, 
    autoCancel: true, 
    alignment: DialogAlignment.Center, 
    offset: { dx: 0, dy: -20 }, 
    gridCount: 4, 
    showInSubWindow: true, 
    isModal: true, 
    customStyle: false, 
    cornerRadius: 10, 
  }) 
 
  // 在自定义组件即将析构销毁时将dialogControlle置空 
  aboutToDisappear() { 
    this.dialogController = null // 将dialogController置空 
  } 
 
  onCancel() { 
    console.info('Callback when the first button is clicked') 
  } 
 
  onAccept() { 
    console.info('Callback when the second button is clicked') 
  } 
 
  existApp() { 
    console.info('Click the callback in the blank area') 
  } 
 
  build() { 
    Column() { 
      Button('click me') 
        .onClick(() => { 
          if (this.dialogController != null) { 
            this.dialogController.open() 
          } 
        }).backgroundColor(0x317aff) 
    }.width('100%').margin({ top: 5 }) 
  } 
}