iOS How to fetch user photo from Facebook use parse swift 4 - ios

Question

I have issues with loading user photo from facebook.
I want to fetch facebook user photo to parse data base.
My code:
let permissions:[String] = ["public_profile", "email"]
PFFacebookUtils.logInInBackground(withReadPermissions: permissions) { (user, error) in
if user == nil {
NSLog("Uh oh. The user cancelled the Facebook login.")
} else if user!.isNew {
NSLog("User signed up and logged in through Facebook!")
self.loadData()
} else {
NSLog("User logged in through Facebook!")
}
}
func loadData(){
let fbRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
fbRequest?.start(completionHandler: { (FBSDKGraphRequestConnection, result, error) in
if error == nil{
if let dict = result as? Dictionary<String, AnyObject>{
let name:String = dict["name"] as AnyObject? as! String
let facebookID:String = dict["id"] as AnyObject? as! String
let email:String = dict["email"] as AnyObject? as! String
let pictureURL = "https://graph.facebook.com/\(facebookID)/picture?type=large&return_ssl_resources=1"
let URLRequest = NSURL(string: pictureURL)
let URLRequestNeeded = NSURLRequest(url: URLRequest! as URL)
NSURLConnection.sendAsynchronousRequest(URLRequestNeeded as URLRequest, queue: OperationQueue.main, completionHandler: { (response, data, error) in
if error == nil {
let picture = PFFile(data: data!)
PFUser.current()?.setObject(picture!, forKey: "profilePicture")
PFUser.current()?.saveInBackground()
}
else {
print("Error: \(String(describing: error?.localizedDescription))")
}
})
PFUser.current()!.setValue(name, forKey: "username")
PFUser.current()!.setValue(email, forKey: "email")
PFUser.current()!.saveInBackground()
}
}
})
}
But i all time i have error message, and in data base i have empty row.
How i can fix it?

Answer 1

After trying many methods, this is what works for me.
On AppDelegate, import Parse, ParseFacebookUtilsV4 and FBSDKCoreKit
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
{
PFFacebookUtils.initializeFacebook(applicationLaunchOptions: launchOptions)
FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
return true
}
and add two methods
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
return FBSDKApplicationDelegate.sharedInstance().application(
app,
open: url as URL?,
sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String,
annotation: options[UIApplication.OpenURLOptionsKey.annotation]
)
}
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
return FBSDKApplicationDelegate.sharedInstance().application(
application,
open: url as URL?,
sourceApplication: sourceApplication,
annotation: annotation)
}
And then, on login ViewController:
#IBAction func signInFacebook(_ sender: Any)
{
let permissions = ["public_profile", "email"]
PFFacebookUtils.logInInBackground(withReadPermissions: permissions) { (user : PFUser?, error: Error?) in
if(error != nil)
{
//Display an alert message
let myAlert = UIAlertController(title:"Alert", message:error?.localizedDescription, preferredStyle: UIAlertController.Style.alert)
let okAction = UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil)
myAlert.addAction(okAction)
self.present(myAlert, animated:true, completion:nil);
return
}
else
{
let query = PFQuery(className: "_User")
query.whereKey("email", equalTo: NSNull())
query.findObjectsInBackground (block: { (objects, error) -> Void in
if error == nil
{
// found related objects
for object in objects! {
//delete error user
print(object.value(forKey: "username")!)
object.deleteEventually()
}
}
else{
print(error!.localizedDescription)
}
}
)}
self.indicator.isHidden = false
self.indicator.startAnimating()
self.setUp.isHidden = false
if(FBSDKAccessToken.current() != nil) {
FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email, first_name, last_name"]).start(completionHandler: { (connection, result, error) in
let resultDic = result as! [String: Any]
let nameFB = resultDic["name"] as! String
let emailFB = resultDic["email"] as! String
let idFB = resultDic["id"] as! String
let firstFB = resultDic["first_name"] as! String
let lastFB = resultDic["last_name"] as! String
// correct in case of double First or Last name
let firstFBNoSpaces = firstFB.replacingOccurrences(of: " ", with: "_", options: .literal, range: nil)
let lastFBNoSpaces = lastFB.replacingOccurrences(of: " ", with: "_", options: .literal, range: nil)
var userNameNew = firstFBNoSpaces + "_" + lastFBNoSpaces
userNameNew = userNameNew.lowercased()
// send data to server to related columns
let user = PFUser()
user.username = userNameNew.lowercased()
user.email = emailFB.lowercased()
user.password = idFB
user["fullname"] = nameFB.capitalized
UserDefaults.standard.set(user.username, forKey: "username")
// get Facebook profile picture
let userProfile = "https://graph.facebook.com/" + idFB + "/picture?type=large"
let profilePictureUrl = NSURL(string: userProfile)
let profilePictureData = NSData(contentsOf: profilePictureUrl! as URL)
if(profilePictureData != nil)
{
let avaFile = PFFile(data:profilePictureData! as Data)
user["ava"] = avaFile
}
// will try to login with facebook
user.signUpInBackground { (success, error) -> Void in
if success
{
// remember looged user
UserDefaults.standard.set(user.username, forKey: "username")
UserDefaults.standard.set(true, forKey: "byFacebook")
// call login func from AppDelegate.swift class
let appDelegate : AppDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.login()
self.setUp.isHidden = true
self.indicator.isHidden = true
self.indicator.stopAnimating()
}
else
{
let existing : String? = UserDefaults.standard.string(forKey: "username")
// user already exists in app database
PFUser.logInWithUsername(inBackground: existing!, password: user.password!){ (user, error) -> Void in
if error == nil
{
// remember user or save in App Memory did the user login or not
UserDefaults.standard.set(user!.username, forKey: "username")
UserDefaults.standard.set(true, forKey: "byFacebook")
// call login function from AppDelegate.swift class
let appDelegate : AppDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.login()
self.setUp.isHidden = true
self.indicator.isHidden = true
self.indicator.stopAnimating()
}
}
}
}
})
}
else
{
self.setUp.isHidden = true
self.indicator.isHidden = true
self.indicator.stopAnimating()
}
}
}

Answer 2

you can try
#IBAction func loginFacebookAction(sender: AnyObject) {//action of the custom button in the storyboard
let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
fbLoginManager.logIn(withReadPermissions: ["email"], from: self) { (result, error) -> Void in
if (error == nil){
let fbloginresult : FBSDKLoginManagerLoginResult = result!
// if user cancel the login
if (result?.isCancelled)!{
return
}
if(fbloginresult.grantedPermissions.contains("email"))
{
self.getFBUserData()
}
}else {
print(error!.localizedDescription)
// self.view.showToast(withMessage: error!.localizedDescription)
}
}
}
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){
//everything works print the user data
print(result)
// if let data = result as? [String:Any],
// let user = Mapper<User>().map(
// JSONObject: data
// ){
// AppHelper.set(currentuser: user)
// }
}else {
// self.view.showToast(withMessage: error!.localizedDescription)
print(error!.localizedDescription)
}
})
}
}