CODEWITHSUNDEEP
iosswiftios10
user3647675
user3647675

Reputation:

Difference between UNUserNotificationCenterDelegate and didReceiveRemoteNotification

How iOS behaves when we implement both didReceiveRemoteNotification as well as UNUserNotificationCenterDelegate method - 

  optional public func userNotificationCenter(_ center: 
  UNUserNotificationCenter, didReceive response: UNNotificationResponse, 
  withCompletionHandler completionHandler: @escaping () -> Swift.Void)

As per documentation didReceiveRemoteNotification is deprecated but if app has implemented both delegate method, which one get call for iOS 10 app as well as iOS 9 app on XCode 8 (swift 3)?

Upvotes: 12

Views: 3023

Answers (1)

rgkobashi
rgkobashi

Reputation: 2698

Basically you are asking two questions,

  1. Title: Difference between UNUserNotificationCenterDelegate and didReceiveRemoteNotification?
  2. Body: How iOS behaves when we implement both didReceiveRemoteNotification as well as UNUserNotificationCenterDelegate method

Answering #1 (according to Apple docs):

  • Deprecated: application(:didReceiveRemoteNotification:)

  • For remote-silent notifications: application(:didReceiveRemoteNotification:fetchCompletionHandler:)

  • For remote-not-silent notifications:

    • When app is on background: userNotificationCenter(:didReceive:withCompletionHandler:)

    • When app is on foreground: userNotificationCenter(:willPresent:withCompletionHandler:)

  • When app will be launched from notification (look for the notification on launchOptions?[.remoteNotification]): application(:didFinishLaunchingWithOptions:)

Answering #2:

If you implement UNUserNotificationCenterDelegate methods, application(:didReceiveRemoteNotification:fetchCompletionHandler:) will not be called for remote-not-silent notifications.

application(:didReceiveRemoteNotification:fetchCompletionHandler:) will be called only for remote-silent notifications.

If you are wondering why, you can take a look a this article

Upvotes: 26

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