swift 3 facebook integration - swift

Question

trying to get Facebook connect working from a swift project.
Have been trying to follow along the following youtube video: https://www.youtube.com/watch?v=I6rTmfLp9aY
which unfortunately for me is in German.
so this is what I have so far:
I have my Facebook app with IOS enabled enabled and I planted my bundleID there.
Downloaded latest iOS framework and added to project
to the AppDelegate file I added:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FBSDKApplicationDelegate.sharedInstance()
return true
}
func applicationDidBecomeActive(_ application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
FBSDKAppEvents.activateApp()
}
and this is the ViewController file
import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
import FBSDKShareKit
class ViewController: UIViewController, FBSDKAppInviteDialogDelegate, FBSDKLoginButtonDelegate{
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
if (FBSDKAccessToken.current() != nil)
{
let content = FBSDKAppInviteContent()
content.appLinkURL = NSURL(string: "{Facebook link to app}") as URL!
FBSDKAppInviteDialog.show(from: self, with: content, delegate: self)
}
else
{
let loginView : FBSDKLoginButton = FBSDKLoginButton()
self.view.addSubview(loginView)
loginView.center = CGPoint(x: self.view.frame.midX, y: self.view.frame.midY + 100)
loginView.readPermissions = ["public_profile", "email"]
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func appInviteDialog (_ appInviteDialog: FBSDKAppInviteDialog!, didCompleteWithResults results: [AnyHashable : Any]!)
{
}
func appInviteDialog (_ appInviteDialog: FBSDKAppInviteDialog!, didFailWithError error: Error!) {
print("Error took place in appInviteDialog \(error)")
}
func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {
if ((error) != nil)
{
//process error
}
else if result.isCancelled {
//handle cancelation
}
else {
let content = FBSDKAppInviteContent()
content.appLinkURL = NSURL(string: "{Facebook link to app}") as URL!
FBSDKAppInviteDialog.show(from: self, with: content, delegate: self)
if result.grantedPermissions.contains("email")
{
//do work
}
}
}
func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
}
}
No errors and no alerts. When i run simulator I get an empty screen. Must be doing something right cause I get the following msg:
SystemGroup/systemgroup.com.apple.configurationprofiles
2017-06-04 00:42:02.351876+0300 facebook_login[4569:144075] [MC] Reading from private effective user settings.
also, if I just paste in viewDidLoad the following lines from the code:
let loginView : FBSDKLoginButton = FBSDKLoginButton()
self.view.addSubview(loginView)
loginView.center = CGPoint(x: self.view.frame.midX, y: self.view.frame.midY + 100)
loginView.readPermissions = ["public_profile", "email"]
I get a beautiful Facebook button in simulator that of course crashes when i press it.
any help to work will be greatly appreciated

Answer 1

Facebook has a Swift SDK you might find easier to use than the Objective-C one (which they just call iOS). Try looking around the documentation here:
https://developers.facebook.com/docs/swift
Also, follow the steps described in the (other) iOS SDK to get started:
https://developers.facebook.com/docs/ios/getting-started/
This is the minimal app delegate I could get to work (notice the Swift SDK is missing the FB prefixes that exist in the iOS SDK):
import UIKit
import FacebookCore
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
SDKApplicationDelegate.shared.application(application, didFinishLaunchingWithOptions: launchOptions)
return true
}
func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
return SDKApplicationDelegate.shared.application(app, open: url, options: options)
}
}
And be sure to add all the required keys in your Info.plist or else you won't get authentication to work at all.

Answer 2

func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith
result:FBSDKLoginManagerLoginResult!, error: Error!) {
if ((error) != nil) {
// Process error
print("Error! : \(error.localizedDescription)")
return
} else if result.isCancelled {
// Handle cancellations
print("Success! : user cancel login request")
return
} else {
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields" : "id, email, name,picture.type(large)"])
graphRequest.start(completionHandler: { (connection, result, error) -> Void in
if ((error) != nil) {
print("Error: \(error)")
} else {
// Do work in app.
let dataDict:NSDictionary = result as! NSDictionary
if let token = FBSDKAccessToken.current().tokenString {
print("tocken: \(token)")
let userDefult = UserDefaults.standard
userDefult.setValue(token, forKey: "access_tocken")
userDefult.synchronize()
}
if let user : NSString = dataDict.object(forKey: "name") as! NSString? {
print("user: \(user)")
}
if let id : NSString = dataDict.object(forKey: "id") as? NSString {
print("id: \(id)")
}
if let email : NSString = (result! as AnyObject).value(forKey: "email") as? NSString {
print("email: \(email)")
}
if let pictureData:NSDictionary = dataDict.object(forKey: "picture") as? NSDictionary{
if let data:NSDictionary = pictureData.object(forKey: "data") as? NSDictionary{
if let strPictureURL: String = data.object(forKey: "url") as? String{
self.imageviewUser.image = UIImage(data: NSData(contentsOf: NSURL(string: strPictureURL)! as URL)! as Data)
}
}
}
}
})
}
}
func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!)
{
FBSDKAccessToken.setCurrent(nil)
FBSDKProfile.setCurrent(nil)
let manager = FBSDKLoginManager()
manager.logOut()
}