ios Facebook 登录按钮 - 不会更改为注销

Question

我正在使用 Xcode 6 和 Facebook iOS SDK 4.3， 我根据 Facebook's guide 嵌入了代码并且登录有效，但是 由于某种原因 -

登录后，按钮没有变为“退出”，而是“使用 Facebook 登录”。

有人遇到过这个问题吗？

Answer 1

所以我从头开始，并遵循了instructions from the guide :

1.在viewController.h文件中:

#import < FBSDKCoreKit/FBSDKCoreKit.h> //<-delete the space

#import < FBSDKLoginKit/FBSDKLoginKit.h>//<-delete the space

@interface ViewController : UIViewController<FBSDKLoginButtonDelegate>
@property (weak, nonatomic) IBOutlet FBSDKLoginButton *loginButton;

2.在viewController.m文件中:

-(void) viewDidLoad{
   if ([FBSDKAccessToken currentAccessToken]) {
   // User is logged in, do work such as go to next view controller. 
   }

   self.loginButton.readPermissions = @[@"public_profile", @"email", @"user_friends"];

   FBSDKLoginButton *loginButton = [[FBSDKLoginButton alloc] init];
  [self.view addSubview:loginButton];
}

---

然后没用了，I've found this thread那提到我还需要向 AppDelegate didFinishLaunchingWithOptions 添加一些东西:

return [[FBSDKApplicationDelegate sharedInstance] application:application
                                didFinishLaunchingWithOptions:launchOptions];

和

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [[FBSDKApplicationDelegate sharedInstance] application:application
                                                      openURL:url
                                            sourceApplication:sourceApplication
                                                   annotation:annotation];
}

然后成功了! 最后，我将登录按钮更改为注销!