Facebook Integration with ios fails with error message on simulator

Question

After integrating with facebook when I tap on continue with FaceBook button on simulator, it popups this window on simulator..and when I tap on back to home it redirects me to login window and allows me to scroll in facebook insted of redirecting back to my app, and I am not getting any user data with it.

Here is steps that I have done

1. Pod installation: pod 'FBSDKLoginKit'
2. Added Bundle ID in quickstart guide in developer.facebook
3. Enable Single Sign option is selected to NO
4. Added the following code as it is in info.plist

Added the following code in AppDelegate

According to Facebook document we have to import FacebookCore in AppDelegate when we Import it we get warning No such module 'FacebookCore'

import FBSDKCoreKit

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        ApplicationDelegate.shared.application(
                    application,
                    didFinishLaunchingWithOptions: launchOptions
                )
        return true
    }

func application(
            _ app: UIApplication,
            open url: URL,
            options: [UIApplication.OpenURLOptionsKey : Any] = [:]
        ) -> Bool {
            ApplicationDelegate.shared.application(
                app,
                open: url,
                sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String,
                annotation: options[UIApplication.OpenURLOptionsKey.annotation]
            )
        }

Added the following code in SceneDelegate

According to Facebook document we have to import FacebookCore in SceneDelegate when we Import it we get warning No such module 'FacebookCore'

import FBSDKCoreKit  
        
        func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
                guard let url = URLContexts.first?.url else {
                    return
                }
                ApplicationDelegate.shared.application(
                    UIApplication.shared,
                    open: url,
                    sourceApplication: nil,
                    annotation: [UIApplication.OpenURLOptionsKey.annotation]
                )
            }

Added the following code in ViewController

According to Facebook document we have to import FacebookLogin in ViewController when we Import it we get warning No such module 'FacebookLogin'

import FBSDKLoginKit
        
        class ViewController: UIViewController, LoginButtonDelegate
                override func viewDidLoad() {
                    super.viewDidLoad()
                    // Do any additional setup after loading the view.
                    if let token = AccessToken.current,
                            !token.isExpired {
                        let token = token.tokenString
                        let request = FBSDKLoginKit.GraphRequest(graphPath: "me", parameters: ["fields": "email,name"], tokenString: token, version: nil, httpMethod: .get)
                        request.start { connecton, result, error in
                            print("\(result)")
                        }
                    } else{
                        let loginButton = FBLoginButton()
                                loginButton.center = view.center
                        loginButton.delegate = self
                        loginButton.permissions = ["public_profile", "email"]
                                view.addSubview(loginButton)
                    }
                }
            
func loginButton(_ loginButton: FBLoginButton, didCompleteWith result: LoginManagerLoginResult?, error: Error?) {
    let token = result?.token?.tokenString
    let request = FBSDKLoginKit.GraphRequest(graphPath: "me", parameters: ["fields": "email,name"], tokenString: token, version: nil, httpMethod: .get)
    request.start { connecton, result, error in
        print("\(result)")
    }
}

I have tried step 2 from this but I am getting this error while setting development environment.

Answer 1

I think you've mistaken the Facebook login step.

step 1:- install the below pods

pod 'FacebookCore'
pod 'FacebookLogin'
pod 'FacebookShare'

step 2:- add necessary facebook credentials (facebook App Id) and CFBundleURLTypes in info.plist file

step 3:- import FacebookCore and FacebookLogin in your UIViewController where you want the Facebook login feature.

call this method for login with facebook.

func setupFacebookLogin(){
    let loginManager = LoginManager()
    loginManager.logOut()
    loginManager.logIn(permissions: ["public_profile", "email"], from: self, handler: { result, error in
        if error != nil {
            print("ERROR: Trying to get login results")
        } else if result?.isCancelled != nil {
            print("The token is \(result?.token?.tokenString ?? "")")
            if result?.token?.tokenString != nil {
                print("Logged in")
                let graphRequest: GraphRequest = GraphRequest(graphPath: "me", parameters: ["fields": "id, first_name, middle_name, last_name, name, picture, email, gender, birthday"])
                graphRequest.start {  _, result, error in
                    if error != nil {
                        let data: [String: AnyObject] = result as! [String: AnyObject]
                        print("Facebook user data - ",data)
                }
            } else {
                print("Cancelled")
            }
        }
    })
}