IOS - How to disable push notification at logout?

I'm not sure if i got it correctly, but if you don't want to disable push notifications for the app, then you should't call the unregisterForRemoteNotifications. What you can do is, when the user taps the logout button, you can make a logout request to your server, which then removes the notificationID from that account, and after the logout request is completed, you just perform the logout locally (update UI etc).

More info about comment:

Yes, first of all, you should call registerForRemoteNotificationTypes method at every launch, because device token can change. After the delegate method

- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken

is called, you can get the device token and save it to NSUserDefault. That way when the user logs in, you can get the up-to-date device token (if changed), and send it to your server to be added to that account.

So the code might look like this

- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken {
    NSString *newToken = [devToken description];
    newToken = [newToken stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]];
    newToken = [newToken stringByReplacingOccurrencesOfString:@" " withString:@""];
    NSString *notificationID = [newToken description];

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setObject:notificationID forKey:@"notification_id"];
    [prefs synchronize];
}

So, now when the user logs in, just get the notification ID and send it to your server

- (IBAction)userTappedLoginButton {
    // Make your login request
    // You can add the notification id as a parameter
    // depending on your web service, or maybe make
    // another request just to update notificationID
    // for a member

    NSString *notificationID = [[NSUserDefaults standardUserDefaults] objectForKey:@"notification_id"];
    ...
    ...
}

In general it is a bad idea to unregisterForRemoteNotifications after logout and reregister after login. The reason is simple: if the user logins with another account and you don't specifically check for token overlapping in server, the user will start receiving double notifications.

With Swift:

To Register,

UIApplication.shared.registerForRemoteNotifications()

To unregister,

UIApplication.shared.unregisterForRemoteNotifications()

You can easily enable and disable push notifications in your application by calling

To register, call: registerForRemoteNotificationTypes:

[[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     (UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];

To unregister, call: unregisterForRemoteNotificationTypes:

[[UIApplication sharedApplication] unregisterForRemoteNotifications];

For check use

Enable or Disable iPhone Push Notifications try this code

UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
if (types == UIRemoteNotificationTypeNone) 
 // Yes it is..