Facebook Login - Swift Language - iOS 10 - Swift 3

Facebook Login using custom button in Swift Language
Xcode Version 8
Article is Updated with the Facebook 4.16 SDK [27-September-2016].

Install Pods

platform :ios, '9.0'
target 'FBSwiftLogin' do
  use_frameworks!
  # Pods for FBSwiftLogin
    pod 'FacebookCore'
    pod 'FacebookLogin'
    pod 'FacebookShare'
end

platform :ios, '9.0'

target 'FBSwiftLogin' do

use_frameworks!

# Pods for FBSwiftLogin

pod 'FacebookCore'

pod 'FacebookLogin'

pod 'FacebookShare'

end

Appdelegate.swift

import UIKit
import FBSDKLoginKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
    }
    func applicationWillResignActive(_ application: UIApplication) {
        FBSDKAppEvents.activateApp()
    }
    func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
    }
}

import UIKit

import FBSDKLoginKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

}

func applicationWillResignActive(_ application: UIApplication) {

FBSDKAppEvents.activateApp()

}

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {

return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)

}

ViewController.swift
Create touch up inside event for custom button like as follows

//
//  ViewController.swift
//  FBSwiftLogin
//
//  Created by Ashish Kakkad on 05/10/16.
//  Copyright © 2016 Kode. All rights reserved.
//
import UIKit
import FBSDKLoginKit
class ViewController: UIViewController {
    var dict : [String : AnyObject]!
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    @IBAction func btnFBLoginPressed(_ sender: AnyObject) {
        let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
        fbLoginManager.logIn(withReadPermissions: ["email"], from: self) { (result, error) in
            if (error == nil){
                let fbloginresult : FBSDKLoginManagerLoginResult = result!
                if fbloginresult.grantedPermissions != nil {
                    if(fbloginresult.grantedPermissions.contains("email"))
                    {
                        self.getFBUserData()
                        fbLoginManager.logOut()
                    }
                }
            }
        }
    }
    func getFBUserData(){
        if((FBSDKAccessToken.current()) != nil){
            FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start(completionHandler: { (connection, result, error) -> Void in
                if (error == nil){
                    self.dict = result as! [String : AnyObject]
                    print(result!)
                    print(self.dict)
                }
            })
        }
    }
}

// ViewController.swift

// FBSwiftLogin

// Created by Ashish Kakkad on 05/10/16.

import UIKit

import FBSDKLoginKit

class ViewController: UIViewController {

var dict : [String : AnyObject]!

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

}

@IBAction func btnFBLoginPressed(_ sender: AnyObject) {

let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()

fbLoginManager.logIn(withReadPermissions: ["email"], from: self) { (result, error) in

if (error == nil){

let fbloginresult : FBSDKLoginManagerLoginResult = result!

if fbloginresult.grantedPermissions != nil {

if(fbloginresult.grantedPermissions.contains("email"))

{

self.getFBUserData()

fbLoginManager.logOut()

}

func getFBUserData(){

if((FBSDKAccessToken.current()) != nil){

FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start(completionHandler: { (connection, result, error) -> Void in

if (error == nil){

self.dict = result as! [String : AnyObject]

print(result!)

print(self.dict)

}

})

}

In iOS 10 don’t forget to set capabilities (Keychain Sharing) :
Go to your project targets -> Capabilities -> Keychain Sharing -> Toggle Switch ON

Detailed Output Log :

{
    email = "ashishkakkad8@gmail.com";
    "first_name" = Ashish;
    id = 1227390383984537;
    "last_name" = Kakkad;
    name = "Ashish Kakkad";
    picture =     {
        data =         {
            "is_silhouette" = 0;
            url = "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xpf1/v/t1.0-1/p200x200/14192077_1193042490752660_7942165287960590731_n.jpg?oh=bf3bedc4f98190a8f588fc8c3f911328&oe=58ABC3CC&__gda__=1486868896_cfe22abf7b2d6559f3609d8c51fc0663";
        };
    };
}

{

email = "ashishkakkad8@gmail.com";

"first_name" = Ashish;

id = 1227390383984537;

"last_name" = Kakkad;

name = "Ashish Kakkad";

picture = {

data = {

"is_silhouette" = 0;

url = "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xpf1/v/t1.0-1/p200x200/14192077_1193042490752660_7942165287960590731_n.jpg?oh=bf3bedc4f98190a8f588fc8c3f911328&oe=58ABC3CC&__gda__=1486868896_cfe22abf7b2d6559f3609d8c51fc0663";

};

}

Happy Coding 😀

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