AppDelegate Facebook Login for SWIFT 3

AppDelegate.swift

import UIKit
import FBSDKCoreKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        
        FBSDKApplicationDelegate.sharedInstance().application(application
            , didFinishLaunchingWithOptions: launchOptions  )
        
        return true
    }
    
    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
     
        let handled = FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication:options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String!, annotation: options[UIApplicationOpenURLOptionsKey.annotation])

        return handled
    }