如何获取iOS通知相关信息？

iOS通知一般场景，只有点击/删除通知，才能触发对应的回调，具体参考如下：

iOS 10+

• App处于前台收到通知，触发回调：

1. [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]([backcolor=transparent]void[backcolor=transparent])[backcolor=transparent]userNotificationCenter[backcolor=transparent]:([backcolor=transparent]UNUserNotificationCenter[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]center willPresentNotification[backcolor=transparent]:([backcolor=transparent]UNNotification[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]notification withCompletionHandler[backcolor=transparent]:([backcolor=transparent]void[backcolor=transparent] [backcolor=transparent](^)([backcolor=transparent]UNNotificationPresentationOptions[backcolor=transparent]))[backcolor=transparent]completionHandler[backcolor=transparent];

• 点击/删除通知触发回调：

1. [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]([backcolor=transparent]void[backcolor=transparent])[backcolor=transparent]userNotificationCenter[backcolor=transparent]:([backcolor=transparent]UNUserNotificationCenter[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]center didReceiveNotificationResponse[backcolor=transparent]:([backcolor=transparent]UNNotificationResponse[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]response withCompletionHandler[backcolor=transparent]:([backcolor=transparent]void[backcolor=transparent] [backcolor=transparent](^)())[backcolor=transparent]completionHandler[backcolor=transparent];

• 当App处于未运行状态时，点击通知触发的回调：

1. [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]([backcolor=transparent]BOOL[backcolor=transparent])[backcolor=transparent]application[backcolor=transparent]:([backcolor=transparent]UIApplication[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]application didFinishLaunchingWithOptions[backcolor=transparent]:([backcolor=transparent]NSDictionary[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]launchOptions[backcolor=transparent];

• 
  当APP处于前台或后台挂起状态时，点击通知触发的回调：
• 
  iOS 7.0以下版本：

1. [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]([backcolor=transparent]void[backcolor=transparent])[backcolor=transparent]application[backcolor=transparent]:([backcolor=transparent]UIApplication[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]application didReceiveRemoteNotification[backcolor=transparent]:([backcolor=transparent]NSDictionary[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]userInfo[backcolor=transparent];

• iOS 7.0及以上版本：

1. [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]([backcolor=transparent]void[backcolor=transparent])[backcolor=transparent]application[backcolor=transparent]:([backcolor=transparent]UIApplication[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]application didReceiveRemoteNotification[backcolor=transparent]:([backcolor=transparent]NSDictionary[backcolor=transparent] [backcolor=transparent]*)[backcolor=transparent]userInfo fetchCompletionHandler[backcolor=transparent]:([backcolor=transparent]void[backcolor=transparent] [backcolor=transparent](^)([backcolor=transparent]UIBackgroundFetchResult[backcolor=transparent]))[backcolor=transparent]completionHandler[backcolor=transparent];

• 当iOS设备位于前台时，通知一般不弹出，直接触发对应回调，回调中可获取通知信息，回调函数参考上面描述。

• 参考iOS静默通知；
• 当App处于后台（不包括关闭状态）时，发送静默通知，可直接触发对应回调，可对通知相关信息进行处理，且通知不会弹出。

• 参考iOS 10通知适配；
• iOS 10通知新添加的特性Notification Service Extension，使得设备收到通知弹出前，可对通知进行处理，仅支持iOS 10+设备。