Interface Builder文件中未知的FBSDKLoginButton类 [英] Unknown class FBSDKLoginButton in Interface Builder file

问题描述

我的全新项目遇到了一个令人沮丧的构建问题。我正在尝试整合Facebook iOS SDK，但由于某些原因，我收到了一些奇怪的错误。当尝试使用FBSDKLoginKit在故事板视图上显示 FBSDKLoginButton 。

第一个提示是错误的是当我尝试 #import< FBSDKLoginKit / FBSDKLoginKit.h> （但它只在编辑器中显示为错误，仍然编译不正确）：/ p>

无法构建模块FBSDKLoginKit。

奇怪的是，这个错误模块相关的构建设置，即使我将它们设置为原始值。

另外有趣的是，如果我明确地引用了 FBSDKLoginButton class从我的视图控制器（例如以编程方式添加按钮），然后基于storyboard的实例化工作正常。所以我猜这是一个链接器的问题，但我承认不是一个专业的人。

没有一个Facebook SDK文档提到这个问题我可以找到，这是奇怪的，因为我说这是一个全新的清洁项目。

解决方案

我的坏，文档 提及此，并建议解决问题，因为我已经知道，通过引用应用程序
didFinishLaunchingWithOptions：中的 FBSDKLoginButton 类。 （坦白说，在什么地方引用它，无论哪里感觉最舒服，对于我来说，视图控制器更有意义。）

   - （BOOL）应用程序：（UIApplication *）应用程序
 didFinishLaunchingWithOptions：（NSDictionary *）launchOptions 
 {
 //在应用程序启动后重写自定义点。 
 [FBSDKLoginButton class]; 
 ... 
 return YES; 
} 
  

I am experiencing a very frustrating build issue with my brand new project. I am trying to integrate Facebook iOS SDK, but for some reason I am getting some bizarre errors. When trying to use FBSDKLoginKit to display an FBSDKLoginButton on a storyboard view.

The first hint something is wrong is this "error" when I attempt to #import <FBSDKLoginKit/FBSDKLoginKit.h> (however it only appears as an error in the editor; it still compiles fine):

"Could not build module FBSDKLoginKit."

Strangely, this "error" went away after fiddling with some of the module-related build settings, even when I set them back to their original values.

Also interestingly, if I explicitly reference the FBSDKLoginButton class from my view controller (for example add the button programmatically), then storyboard-based instantiation works fine. So I'm guessing this must be some linker issue or something, but I'm admittedly not a pro at that stuff.

None of the Facebook SDK documentation mentions this issue that I can find, which is bizarre because like I said this is a brand new clean project.

解决方案

My bad, the documentation does mention this, and suggests solving it much as I already figured out, by referencing the FBSDKLoginButton class in application didFinishLaunchingWithOptions:. (Frankly it doesn't matter where you reference it, so wherever feels most comfortable. For me, the view controller makes more sense.)

- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    [FBSDKLoginButton class];
    ...
    return YES;
}

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