HarmonyOS NEXT应用开发-Notification Kit（用户通知服务）notificationManager.cancel

1.notificationManager.cancel
支持设备Phone2in1TabletCarWearable
cancel(id: number, label: string, callback: AsyncCallback<void>): void
通过通知ID和通知标签取消已发布的通知。使用callback异步回调。
系统能力：SystemCapability.Notification.Notification
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示例：

import { BusinessError } from '@kit.BasicServicesKit';

// cancel回调
let cancelCallback = (err: BusinessError): void => {
  if (err) {
    console.error(`Failed to cancel notification. Code is ${err.code}, message is ${err.message}`);
  } else {
    console.info(`Succeeded in canceling notification.`);
  } 
}
notificationManager.cancel(0, "label", cancelCallback);

2.notificationManager.cancel
支持设备Phone2in1TabletCarWearable
cancel(id: number, label?: string): Promise<void>
通过通知ID和通知标签取消已发布的通知，若label为空表示取消与指定通知ID相匹配的已发布通知。使用Promise异步回调。
系统能力：SystemCapability.Notification.Notification

示例：

import { BusinessError } from '@kit.BasicServicesKit';

notificationManager.cancel(0).then(() => {
  console.info(`Succeeded in canceling notification.`);
}).catch((err: BusinessError) => {
  console.error(`Failed to cancel notification. Code is ${err.code}, message is ${err.message}`);
});

3.notificationManager.cancel
支持设备Phone2in1TabletCarWearable
cancel(id: number, callback: AsyncCallback<void>): void
取消与指定通知ID相匹配的已发布通知。使用callback异步回调。
系统能力：SystemCapability.Notification.Notification

示例：

import { BusinessError } from '@kit.BasicServicesKit';

// cancel回调
let cancelCallback = (err: BusinessError): void => {
  if (err) {
    console.error(`Failed to cancel notification. Code is ${err.code}, message is ${err.message}`);
  } else {
    console.info(`Succeeded in canceling notification.`);
  }
}
notificationManager.cancel(0, cancelCallback);

本文主要参考引用自HarmonyOS官方网站