didUpdatePushCredentials not get called

问题:

I want to implement VoIP notifications in my iOS application, But the didUpdatePushCredentials method never got called, I can't get the device token.

I had implemented APNS in the application, May these two services conflict ?

Here is my AppDelegate codes

- (void)application:(UIApplication *)application     didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings {     LOGI(@"%@", NSStringFromSelector(_cmd));      //register for voip notifications     self->pushRegistry = [[PKPushRegistry alloc] initWithQueue:dispatch_get_main_queue()];     [self->pushRegistry setDelegate:self];     [self->pushRegistry setDesiredPushTypes:[NSSet setWithObject:PKPushTypeVoIP]];      NSLog(@"VoIP push registered");  }  #pragma mark - VoIP push methods  - (void)pushRegistry:(PKPushRegistry *)registry didUpdatePushCredentials:(PKPushCredentials *)credentials forType:(NSString *)type {     NSLog(@"voip token: %@", credentials.token); }  - (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(NSString *)type {     NSDictionary *payloadDict = [payload.dictionaryPayload valueForKey:@"aps"];     NSString *message = (NSString *)[payloadDict valueForKey:@"alert"];      if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {         UILocalNotification *localNotification = [[UILocalNotification alloc] init];         localNotification.alertBody = [message stringByAppendingString:@" - voip"];         localNotification.applicationIconBadgeNumber = 1;         localNotification.soundName = @"notes_of_the_optimistic.caf";          [[UIApplication sharedApplication] presentLocalNotificationNow:localNotification];     } else {         dispatch_async(dispatch_get_main_queue(), ^{             UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"VoIP notification" message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];             [alert show];         });     }       NSLog(@"incoming voip notfication: %@", payload.dictionaryPayload); }  - (void)pushRegistry:(PKPushRegistry *)registry didInvalidatePushTokenForType:(NSString *)type {     NSLog(@"Voip token invalidate"); } 

• I enabled remote notifications, Certificate and provisioning profiles are installed.
• I can push standard notifications using APNS.

Any solution to get it working ?

回答1:

If you're running a newer xcode (I'm on xcode 9) then VOIP is not in the Background section on the Capabilities tab. This will prevent didUpdatePushCredentials from being called!

The trick is you have to go in your plist, and in Required Background Modes you need to add App provides Voice over IP services.

I can't believe Apple has done this to us. I wasted an 8 hour work day looking for this simple fix.

回答2:

Use below code and Make sure about following things.

**`**// Register for VoIP notifications**`**  - (void) voipRegistration {     dispatch_queue_t mainQueue = dispatch_get_main_queue();     // Create a push registry object     _voipRegistry = [[PKPushRegistry alloc] initWithQueue: mainQueue];     // Set the registry's delegate to self     [_voipRegistry setDelegate:(id<PKPushRegistryDelegate> _Nullable)self];     // Set the push type to VoIP     _voipRegistry.desiredPushTypes = [NSSet setWithObject:PKPushTypeVoIP]; } 

Call Below method in didFinishLaunchingWithOptions

Other deleget method as follow

- (void)pushRegistry:(PKPushRegistry *)registry didUpdatePushCredentials: (PKPushCredentials *)credentials forType:(NSString *)type {     // Register VoIP push token (a property of PKPushCredentials) with server      if([credentials.token length] == 0) {         NSLog(@"voip token NULL");         return;     }     NSLog(@"%@",credentials.token); } 

//Make sure about this in project capabilities

1)Background mode is ON

2)VOIP

3)Background Fetch

4)remotenotification

5) Dont forgot to import delegate

inside the Background MODE

回答3:

There was an issue with Certificates.

Regenerated and reimported certificates and issue fixed.

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