FBSDKLoginManager logInWithPublishPermissions always returns isCancelled=YES

I am having trouble figuring out how to log a user into my app. [FBSDKAccessToken currentAccessToken] is nil, so I am calling:

[[[FBSDKLoginManager alloc] init] logInWithPublishPermissions:@[@"publish_actions"] handler:…];

as per the included sample project. This switches to the Facebook app, but the message says "You have already authorized App Name.". I click OK and it goes back into the app, but grantedPermissions and declinedPermissions are both nil on the result, and isCancelled is YES. [FBSDKAccessToken currentAccessToken] is still nil.

I can't figure out how I'm supposed to get currentAccessToken to be filled in. It seems to me the call to logInWithPublishPermissions should do that, but it isn't.

Solution

You should try adding in your AppDelegate didFinishLaunchingWithOptions :

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

This would get u [FBSDKAccessToken currentAccessToken] when user is logged in.

and

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

If this method is not present into AppDelegate then it results into cancelled state.

Refer to : https://developers.facebook.com/docs/ios/getting-started#startcoding