o modify the badge under ios8 you have to ask for permissions

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

or in objC

UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];[[UIApplication sharedApplication] registerUserNotificationSettings:settings];