if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
{

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0 //__IPHONE_8_0 is not    defined in old xcode (==0). Then use 80000

    NSLog(@"registerForPushNotification: For iOS >= 8.0");

    [[UIApplication sharedApplication] registerUserNotificationSettings:
     [UIUserNotificationSettings settingsForTypes:
      (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge)
                                       categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
#endif
}
else {
    NSLog(@"registerForPushNotification: For iOS < 8.0");
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     (UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];
}