iOS 8推送通知在实际设备上不起作用

我有一个通用的应用程序，我想将APN与iOS Push通知一起使用。我的推送通知与ios 8及更低版本兼容。在模拟器上启动时，“推送通知权限”对话框可以正常工作。但是当在真实设备中启动时，它会说：

“试图标记应用程序图标，但尚未获得用户的许可以标记应用程序”

AppDelegate

[[NotificationManager sharedInstance] requestPushNotificationIfNeeded];

NotificationManager-requestPushNotificationIfNeeded

// Refresh the token.
    #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
    if([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]){
        // iOS 8 Notification
        UIUserNotificationType types = UIUserNotificationTypeSound | UIUserNotificationTypeBadge | UIUserNotificationTypeAlert;
        UIUserNotificationSettings *notificationSettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
    }
    else {
        // Less then iOS 8
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
         UIRemoteNotificationTypeAlert |
         UIRemoteNotificationTypeBadge |
         UIRemoteNotificationTypeSound];
    }
#else
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     UIRemoteNotificationTypeAlert |
     UIRemoteNotificationTypeBadge |
     UIRemoteNotificationTypeSound];
#endif

应用程序委托方法

#ifdef __IPHONE_8_0
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:   (UIUserNotificationSettings *)notificationSettings
{
    TRACE(@"Delegate did");
    //register to receive notifications
    [application registerForRemoteNotifications];
}
#endif

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
    // Using parse.com save push notification token
}

问题

此代码有什么问题？我试了好几天，但徒劳无功。您能指导我这个错误吗？怎么了，还是我错过了必要的东西？太感谢了。

顺便说一下，我注销的委托方法仅注册UIUserNotificationTypeAlert；

Delegate didRegisterUserNotificationSettings: <UIUserNotificationSettings: 0x17422e2c0; types: (UIUserNotificationTypeAlert);>