didReceiveRemoteNotification not called Swift

Question

For some reason my didReceiveRemoteNotification is never called. I have done the following:

checklist of APNS:

Create AppId allowed with Push Notification

Create SSL certificate with valid certificate and app id

Create Provisioning profile with same certificate and make sure to add device

With Code:

Register app for push notification

Handle didRegisterForRemoteNotificationsWithDeviceToken method

Set targets> Capability> background modes> Remote Notification Handle didReceiveRemoteNotification

Yet my function does not seem to get called. My code looks like this:

  func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    if (application.respondsToSelector("isRegisteredForRemoteNotifications"))
    {
        // iOS 8 Notifications
        application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: (.Badge | .Sound | .Alert), categories: nil));
        application.registerForRemoteNotifications()
    }
    else
    {
        // iOS < 8 Notifications
        application.registerForRemoteNotificationTypes(.Badge | .Sound | .Alert)
    }


    return true
}


func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    let tokenChars = UnsafePointer<CChar>(deviceToken.bytes)
    var tokenString = ""

    for var i = 0; i < deviceToken.length; i++ {
        tokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]])
    }

    apnsID = tokenString
    println("******apnsID is \(apnsID)")
    dToken = deviceToken
    println("******dToken is \(dToken)")
    NSUserDefaults.standardUserDefaults().setObject(deviceToken, forKey: "deviceToken")
}

func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
    println("***********didFailToRegisterForRemoteNotificationsWithError")
    println(error)
}

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {

    println("Getting notification")

    var message: NSString = ""
    var alert: AnyObject? = userInfo["aps"]

    println(userInfo["aps"])

    if((alert) != nil){
        var alert = UIAlertView()
        alert.title = "Title"
        alert.message = "Message"
        alert.addButtonWithTitle("OK")
        alert.show()
    }

}

Answer 1

add content_available:true in your request . for iOS payload data.You will get notification in didReceiveRemoteNotification. Now handle it.

Answer 2

As I found out having the same problem myself, in order for didReceiveRemoteNotificationto be called, the incoming notification music carry an "available_content" : true parameter with the notification payload. So in case of you sending the notification in a dictionary form , as was my case in device to device pushes, you just have to add it in the dictionary as you would specify other parameters as you would for sound or badge, also needed if you're using some sort of push service as Postman

Answer 3

Three steps:

1. Add logic here to handle incoming notification:

   func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { // Add your logic here

completionHandler(.newData)

}

2. Add Background mode to capabilities in target, and ensure to check 'Remote notifications'

3. While sending a push notification, add "content_available" : true

This worked for me in iOS 14/Xcode 12.3.