instanceID在实际设备中返回nil，但不是'；ios中模拟器中的t-nil

我正在使用fcm进行推送通知。 我在我的项目上完全开发了FCM，我一步一步地遵循firebase教程 （我的语言是客观的-c） 我的设备令牌已生成，但instanceID未生成！！换句话说，refreshToken方法从未调用过！。 现在，当我在模拟器中运行我的项目时，instanceID被生成。但当我在真实设备instanceID中运行我的项目时，返回null！！ 我的实时设备中的时间和日期是最新的，但仍然无法工作！！它是在模拟器中运行project时我的控制台的日志：

在真实设备中运行我的项目时，会显示以下日志：

2017-04-12 16:53:44.504 pin-Go[1031] <Notice> [Firebase/Analytics][I-ACS023012] Firebase Analytics enabled
2017-04-12 16:53:44.546831+0430 pin-Go[1031:175957] APNs token retrieved: <f73de751 b71d59b8 f1e3b83a 826646ba d6338e7c a1a062be 4adda159 83cb5fa5>
2017-04-12 16:53:44.804239+0430 pin-Go[1031:175957] animating is complited ..
2017-04-12 16:53:44.804639+0430 pin-Go[1031:175957] animating is complited.
2017-04-12 16:53:45.124628+0430 pin-Go[1031:175957] animating1 ...
2017-04-12 16:53:45.751638+0430 pin-Go[1031:175957] Connected to FCM.
2017-04-12 16:53:45.755046+0430 pin-Go[1031:175957] InstanceID token: (null)

2017-04-12 16:53:44.504 pin Go[1031][Firebase/Analytics][I-ACS023012]已启用Firebase分析功能
2017-04-12 16:53:44.546831+0430 pin Go[1031:175957]检索到的APNs令牌：
2017-04-12 16:53:44.804239+0430插脚[1031:175957]动画制作已完成。。
2017-04-12 16:53:44.804639+0430插脚[1031:175957]动画制作已完成。
2017-04-12 16:53:45.124628+0430插针进入[1031:175957]动画1。。。
2017-04-12 16:53:45.751638+0430引脚Go[1031:175957]连接到FCM。
2017-04-12 16:53:45.755046+0430 pin Go[1031:175957]实例ID令牌：（空）

我的代码与此代码完全相同：

我的日志没有显示任何错误。。。 有人能帮我吗

编辑：这是我的代码：

  #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
    @import UserNotifications;
    #endif
    @import GoogleMaps;
    @import GooglePlaces;
    #import "AfzayeshMojodiViewController.h"
    #import "ChangeInfoViewController.h"
    #import "MasirMontakhaViewController.h"
    @import Firebase;


    // Implement UNUserNotificationCenterDelegate to receive display notification via APNS for devices
    // running iOS 10 and above. Implement FIRMessagingDelegate to receive data message via FCM for
    // devices running iOS 10 and above.
    #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
    @interface AppDelegate () <UNUserNotificationCenterDelegate, FIRMessagingDelegate>
    @end
    #endif
    // Copied from Apple's header in case it is missing in some cases (e.g. pre-Xcode 8 builds).
    #ifndef NSFoundationVersionNumber_iOS_9_x_Max
    #define NSFoundationVersionNumber_iOS_9_x_Max 1299
    #endif

    @implementation AppDelegate
    NSString *const kGCMMessageIDKey = @"gcm.message_id";

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        self.urlStrWebService = [[NSString alloc] init];


        //Start of GCM
        // [START configure_firebase]
        [FIRApp configure];

        if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_9_x_Max) {
            UIUserNotificationType allNotificationTypes =
            (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
            UIUserNotificationSettings *settings =
            [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
            [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
        } else {
            // iOS 10 or later
    #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
            // For iOS 10 display notification (sent via APNS)
            [UNUserNotificationCenter currentNotificationCenter].delegate = self;
            UNAuthorizationOptions authOptions =
            UNAuthorizationOptionAlert
            | UNAuthorizationOptionSound
            | UNAuthorizationOptionBadge;
            [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:authOptions completionHandler:^(BOOL granted, NSError * _Nullable error) {
            }];

            // For iOS 10 data message (sent via FCM)
            [FIRMessaging messaging].remoteMessageDelegate = self;
    #endif
        }

        [[UIApplication sharedApplication] registerForRemoteNotifications];
  return YES;
}     

//start implementing notification reciver :


//// [START receive_message]
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    // If you are receiving a notification message while your app is in the background,
    // this callback will not be fired till the user taps on the notification launching the application.
    // TODO: Handle data of notification

    // Print message ID.
    if (userInfo[kGCMMessageIDKey]) {
        NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
    }

    // Print full message.
    NSLog(@"%@", userInfo);
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    // If you are receiving a notification message while your app is in the background,
    // this callback will not be fired till the user taps on the notification launching the application.
    // TODO: Handle data of notification

    // Print message ID.
    if (userInfo[kGCMMessageIDKey]) {
        NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
    }


    // Print full message.
    NSLog(@"%@", userInfo);

    completionHandler(UIBackgroundFetchResultNewData);
}
// [END receive_message]

// [START ios_10_message_handling]
// Receive displayed notifications for iOS 10 devices.
#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
// Handle incoming notification messages while app is in the foreground.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
    // Print message ID.
    NSDictionary *userInfo = notification.request.content.userInfo;
    if (userInfo[kGCMMessageIDKey]) {
        NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
    }

    // Print full message.
    NSLog(@"%@", userInfo);

    // Change this to your preferred presentation option
    completionHandler(UNNotificationPresentationOptionNone);
}

// Handle notification messages after display notification is tapped by the user.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void (^)())completionHandler {
    NSDictionary *userInfo = response.notification.request.content.userInfo;
    if (userInfo[kGCMMessageIDKey]) {
        NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
    }

    // Print full message.
    NSLog(@"%@", userInfo);

    completionHandler();
}
#endif
// [END ios_10_message_handling]

// [START ios_10_data_message_handling]
#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
// Receive data message on iOS 10 devices while app is in the foreground.
- (void)applicationReceivedRemoteMessage:(FIRMessagingRemoteMessage *)remoteMessage {
    // Print full message
    NSLog(@"%@", remoteMessage.appData);
}
#endif
// [END ios_10_data_message_handling]

// [START refresh_token]
- (void)tokenRefreshNotification:(NSNotification *)notification {
    // Note that this callback will be fired everytime a new token is generated, including the first
    // time. So if you need to retrieve the token as soon as it is available this is where that
    // should be done.
    NSString *refreshedToken = [[FIRInstanceID instanceID] token];
    NSLog(@"InstanceID token: %@", refreshedToken);

    // Connect to FCM since connection may have failed when attempted before having a token.
    [self connectToFcm];

    // TODO: If necessary send token to application server.
}
// [END refresh_token]

// [START connect_to_fcm]
- (void)connectToFcm {
//    // Won't connect since there is no token
//    if (![[FIRInstanceID instanceID] token]) {
//        return;
//    }

    // Disconnect previous FCM connection if it exists.
    [[FIRMessaging messaging] disconnect];

    [[FIRMessaging messaging] connectWithCompletion:^(NSError * _Nullable error) {
        if (error != nil) {
            NSLog(@"Unable to connect to FCM. %@", error);
        } else {
            NSLog(@"Connected to FCM.");
            NSString *refreshedToken = [[FIRInstanceID instanceID] token];
            NSLog(@"InstanceID token: %@", refreshedToken);
        }
    }];
}
// [END connect_to_fcm]

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
    NSLog(@"Unable to register for remote notifications: %@", error);
}

// This function is added here only for debugging purposes, and can be removed if swizzling is enabled.
// If swizzling is disabled then this function must be implemented so that the APNs token can be paired to
// the InstanceID token.
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    NSLog(@"APNs token retrieved: %@", deviceToken);

    // With swizzling disabled you must set the APNs token here.
     [[FIRInstanceID instanceID] setAPNSToken:deviceToken type:FIRInstanceIDAPNSTokenTypeSandbox];
    [self connectToFcm];
}

// [START connect_on_active]
- (void)applicationDidBecomeActive:(UIApplication *)application {
    [self connectToFcm];
}
// [END connect_on_active]

// [START disconnect_from_fcm]
- (void)applicationDidEnterBackground:(UIApplication *)application {
    [[FIRMessaging messaging] disconnect];
    NSLog(@"Disconnected from FCM");
}
// [END disconnect_from_fcm]


//end of implement notification.

#如果定义（uu IPHONE_10_0）和&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
@导入用户通知；
#恩迪夫
@导入谷歌地图；
@输入谷歌网站；
#导入“AfzayeshMojodiViewController.h”
#导入“ChangeInfoViewController.h”
#导入“MasirMontakhaViewController.h”
@进口火基；
//实现UnuseNotificationCenterDelegate以通过APN接收设备的显示通知
//运行iOS 10及以上版本。实施FIRMessagingDelegate以通过FCM接收数据消息
//运行iOS 10及以上版本的设备。
#如果已定义（uuIphone_10_0）&&&uIphone_OS_0版本允许的最大值>=\uIphone_10_0
@接口AppDelegate（）
@结束
#恩迪夫
//复制自苹果的标题，以防在某些情况下丢失（例如，Xcode 8之前的版本）。
#ifndef NSFoundationVersionNumber\u iOS\u 9\u x\u Max
#定义NSFoundationVersionNumber\u iOS\u 9\u x\u Max 1299
#恩迪夫
@实现AppDelegate
NSString*const kGCMMessageIDKey=@“gcm.message_id”；
-（BOOL）应用程序：（UIApplication*）应用程序使用选项完成启动：（NSDictionary*）启动选项{
self.urlStrWebService=[[NSString alloc]init]；
//GCM的开始
//[启动配置\u firebase]
[FIRApp配置]；
如果（楼层（NSFoundationVersionNumber）=\uu IPHONE\u10\u0
//对于iOS 10显示通知（通过APNS发送）
[UnuseNotificationCenter currentNotificationCenter]。委托=自身；
未授权选项授权选项=
未授权选项ERT
|未授权选项声音
|未经授权的选择徽章；
[[UNUserNotificationCenter currentNotificationCenter]requestAuthorizationWithOptions:authOptions completionHandler:^（BOOL-grated，NSError*_-Nullable-error）{
}];
//对于iOS 10数据消息（通过FCM发送）
[FIRMessaging messaging].remoteMessageDelegate=self；
#恩迪夫
}
[[UIApplication sharedApplication]注册表项的删除]；
返回YES；
}     
//开始实施通知接收器：
////[启动接收消息]
-（无效）应用程序：（UIApplication*）应用程序DidReceiveMemotentification:（NSDictionary*）用户信息{
//如果您在应用程序处于后台时收到通知消息，
//在用户点击启动应用程序的通知之前，不会触发此回调。
//TODO:处理通知的数据
//打印消息ID。
if（userInfo[kGCMMessageIDKey]）{
NSLog（@“消息ID:%@”，userInfo[kGCMMessageIDKey]）；
}
//打印完整消息。
NSLog（@“%@”，userInfo）；
}
-（无效）应用程序：（UIApplication*）应用程序DidReceiveMemotentification:（NSDictionary*）用户信息
fetchCompletionHandler:（void（^）（UIBackgroundFetchResult））completionHandler{
//如果您在应用程序处于后台时收到通知消息，
//在用户点击启动应用程序的通知之前，不会触发此回调。
//TODO:处理通知的数据
//打印消息ID。
if（userInfo[kGCMMessageIDKey]）{
NSLog（@“消息ID:%@”，userInfo[kGCMMessageIDKey]）；
}
//打印完整消息。
NSLog（@“%@”，userInfo）；
completionHandler（UIBackgroundFetchResultNewData）；
}
//[结束接收消息]
//[启动ios\u 10\u消息\u处理]
//接收iOS 10设备的显示通知。
#如果已定义（uuIphone_10_0）&&&uIphone_OS_0版本允许的最大值>=\uIphone_10_0
//在应用程序处于前台时处理传入的通知消息。
-（void）用户通知中心：（UNUserNotificationCenter*）中心
遗嘱提示通知：（未通知*）通知
withCompletionHandler:（void（^）（UNNotificationPresentationOptions））completionHandler{
//打印消息ID。
NSDictionary*userInfo=notification.request.content.userInfo；
if（userInfo[kGCMMessageIDKey]）{
NSLog（@“消息ID:%@”，userInfo[kGCMMessageIDKey]）；
}
//打印完整消息。
NSLog（@“%@”，userInfo）；
//将此更改为首选的演示选项
completionHandler（UNNotificationPresentationOptionNone）；
}
//在用户点击显示通知后处理通知消息。
-（void）用户通知中心：（UNUserNotificationCenter*）中心
didReceiveNotificationResponse:（未通知响应*）响应
withCompletionHandler:（void（^）（）completionHandler{
NSDictionary*userInfo=response.notification.request.content.userInfo；
if（userInfo[kGCMMessageIDKey]）{
NS