更新 iOS 9 和 Facebook sdk 4.6 后，登录窗口打不开

我将 Xcode 更新到 7，将 Facebook 更新到 4.6 sdk。

这是我的警告：

Warning: Attempt to present <FBSDKContainerViewController: 0x159337700> on <UIAlertController: 0x159262700> whose view is not in the window hierarchy!

在我的项目中，BitCode 为 NO - 因为如果我将其设置为 Yes，我会收到此错误：

ld:'/Users/MyName/Desktop/MyProjectName/ProjectName/ProjectName/Resources/Frameworks/Fabric.framework/Fabric(Fabric.o)' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

这是解析方法：

-(void)signInWithFacebookClicked
{
NSArray *permissions = [NSArray arrayWithObjects:@"email",@"user_friends", nil];
[PFFacebookUtils logInInBackgroundWithReadPermissions:permissions block:^(PFUser *user, NSError *error)
 {
     if (!user) // The user cancelled the Facebook login
     {
         NSLog(@"Uh oh. The user cancelled the Facebook login.");
     }
     else if (user.isNew) // New user (not stored on DB) - User signed up and logged in through Facebook
     {
         [self handleNewUser];
     }
     else if (user) // the user is exist at DB
     {
       // the user is exist at DB  
     }
     else if (error)
     {
        // showAlertOfSomethingWentWrong
     }
 }];
}

这是 FBSDKGraphRequest ：

-(void)handleNewUser
{

FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"friends, first_name, gender, last_name, link, name, verified, picture, email"}];
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error)
 {
     NSMutableDictionary *userData = (NSMutableDictionary *)result;
}];

我的问题是那一行：

[PFFacebookUtils logInInBackgroundWithReadPermissions:permissions block:^(PFUser *user, NSError *error)

iPhone 中的运行永远不会进入此块，在模拟器中工作正常。

我遇到了类似的问题，我试图在 FBSDKContainerViewController 之上显示登录警报。

在这次通话中

- (void)logInWithReadPermissions:(NSArray *)permissions
          fromViewController:(UIViewController *)fromViewController
                     handler:(FBSDKLoginManagerRequestTokenHandler)handler;

Facebook 提供了自己的视图控制器，如果您不指定 fromViewController，“将尽可能自动确定最顶层的视图控制器”。

在你的例子中，听起来 Facebook 正试图在被解除的警报之上呈现，即使这不是正在调用的调用。