ios 获取推送怎么获取不到deviceToken

昨天下午还能收到推送，晚上好像是收不到了，当时没在意，今天下午跟了代码发现
应该是走过一次didRegisterForRemoteNotificationsWithDeviceToken拿到过deviceToken
后面再运行或者卸载了再运行
didRegisterForRemoteNotificationsWithDeviceToken
didFailToRegisterForRemoteNotificationsWithError
这两个方法都不走了。

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject:AnyObject]?) -> Bool {
        let types: UIUserNotificationType = [.Alert, .Badge, .Sound]
        let settings = UIUserNotificationSettings(forTypes: types, categories: nil)
        UIApplication.sharedApplication().registerUserNotificationSettings(settings)
        UIApplication.sharedApplication().registerForRemoteNotifications()
        return true
    }
    
    func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) {
        if (notificationSettings.types != UIUserNotificationType.None) {
            application.registerForRemoteNotifications()
        }
    }

didRegisterUserNotificationSettings 这个是走了的。
然而上面两个是不走的。

搞了一下午 换Provisioning Profile好几次也无济于事。
才学ios没多久感觉总是遇到一些奇怪的问题

请问下有人遇到过这样的问题吗？
感谢大家！！！