Device Token not received when registering for rem

问题:

I somehow can not receive the device token when registering for remote notifications. I get the modal saying "Do you want to allow App X to be able to send you notificaitons", but when I accept it, the didRegisterForRemoteNotifications function is not called.

When I register for remote notifications in iOS 8/Swift using this code:

    UIApplication.sharedApplication().registerForRemoteNotifications()
    let settings = UIUserNotificationSettings(forTypes: UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound, categories: nil)
    UIApplication.sharedApplication().registerUserNotificationSettings(settings)
    UIApplication.sharedApplication().registerForRemoteNotifications()

These functions are not triggered at all:

   func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData!) 

and

func application(application: UIApplication,    didFailToRegisterForRemoteNotificationsWithError error: NSError!) 

however when I log this

println("current settings \(UIApplication.sharedApplication().currentUserNotificationSettings()) and \(UIApplication.sharedApplication().isRegisteredForRemoteNotifications())")

I receive

"current settings <UIUserNotificationSettings: 0x170437120; types: (UIUserNotificationTypeAlert UIUserNotificationTypeBadge UIUserNotificationTypeSound);> and true" 

My provisioning profile and certificates ar all in order.

Has someone else had this problem?

回答1:

You can try this

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

        var types: UIUserNotificationType = UIUserNotificationType.Badge |
            UIUserNotificationType.Alert |
            UIUserNotificationType.Sound

        var settings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, categories: nil)

        application.registerUserNotificationSettings(settings)
        application.registerForRemoteNotifications()

        return true
    }

    func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {

        var characterSet: NSCharacterSet = NSCharacterSet(charactersInString: "<>")

        var deviceTokenString: String = (deviceToken.description as NSString)
            .stringByTrimmingCharactersInSet(characterSet)
            .stringByReplacingOccurrencesOfString( " ", withString: "") as String

        println(deviceTokenString)

    }

EDIT: Update for Swift 2.x

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


        let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)

        application.registerUserNotificationSettings(settings)
        application.registerForRemoteNotifications()

        return true
    }

EDIT: Update for Swift 3.x

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

    let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)

    application.registerUserNotificationSettings(settings)
    application.registerForRemoteNotifications()

    return true
}


func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
let characterSet = CharacterSet(charactersIn: "<>")
    let deviceTokenString = deviceToken.description.trimmingCharacters(in: characterSet).replacingOccurrences(of: " ", with: "");
    print(deviceTokenString)
}

回答2:

For Swift 3.0 you can use:

let deviceTokenString = message.reduce("", {$0 + String(format: "%02X", $1)})

回答3:

Do this:

   UIApplication.sharedApplication().registerForRemoteNotifications()

回答4:

Please make sure your certificates are valid and app is registered successfully,Do some Googling and u will sure find right way.This code worked for me.

(in AppDelegate.swift didFinishLaunchingWithOptions method )

var notify : UIUserNotificationSettings = UIUserNotificationSettings(forTypes:UIUserNotificationType.Alert|UIUserNotificationType.Sound, categories: nil)
    UIApplication.sharedApplication().registerUserNotificationSettings(notify)
    UIApplication.sharedApplication().registerForRemoteNotifications()

// Add Delegate methods of UIApplication

   func application(application: UIApplication,didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData){
 //send this device token to server

    println("\(deviceToken)")
}

//Called if unable to register for APNS.

func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {

    println(error)

}

回答5:

For swift 4.0 please follow some steps :

1).On push notification in capabilities(TARGET)

2).Use this code in didFinishLaunchingWithOptions

  let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)

        application.registerUserNotificationSettings(settings)
        application.registerForRemoteNotifications()

3).Add this also

 func application(_ application: UIApplication,
                 didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    let tokenParts = deviceToken.map { data -> String in
        return String(format: "%02.2hhx", data)
    }

    let token = tokenParts.joined()
    print("Device Token: \(token)")  
} 

回答6:

If you get this message, then you have already registered and the method will get called only when the application gets launched or the token gets changed. It has slight chance that the token will be updated.

Probably, you can try to delete the application from you test device and try to clear it from Xcode. And do it over again.