FBSDK (New Facebook SDK 4.0) Implementation is not working for Login with Facebook

Question

I am using this following block which is mentioned in Facebook Developer. But when my App callbacks from Browser then it

Answer 1

You must add the following method in your appDelegate

- (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 the above method is not present into AppDelegate then it results into cancelled state.

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