Swift displayed firebase photoUrl cannot replace image by image picker - swift

Question

I use Firebase as the back-end of my app. When user finish authentication they will go to profile create page. It displays the user profile picture from facebook.
I use this code to display
func displayProfilePic(user: FIRUser?){
let photoURL = user?.photoURL
struct last {
static var photoURL: NSURL? = nil
}
last.photoURL = photoURL; // to prevent earlier image overwrites later one.
if let photoURL = photoURL {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), {
let data = NSData.init(contentsOfURL: photoURL)
if let data = data {
let image = UIImage.init(data: data)
dispatch_async(dispatch_get_main_queue(), {
if (photoURL == last.photoURL) {
self.profilePic.image = image
}
})
}
})
} else {
profilePic.image = UIImage.init(named: "DefaultPic")
}
However, I also let user to pick their own profile picture by camera or photo library. When user choose their Image it will display the picked Image for 1 to 2 second, and display back the facebook profile picture. That's mean, the "picked image cannot replace the facebook profile picture"
It is my code for the camera and photo library
func openGallary(){
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.SavedPhotosAlbum){
print("Pick Photo")
self.imagePicker.delegate = self
self.imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.imagePicker.allowsEditing = true
self.presentViewController(self.imagePicker, animated: true, completion: nil)
}
}
func openCamera(){
if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)){
self.imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
self.imagePicker.allowsEditing = true
self.presentViewController(self.imagePicker, animated: true, completion: nil)
}else{
print("you got no camara")
}
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
self.dismissViewControllerAnimated(true, completion: { () -> Void in
})
profilePic.image = image
}

Answer 1

Firebase Authentication takes a photo URL, so the public location where a profile photo for the user is present. If you want to allow the user to upload a new profile photo, you will have to find a place to store the photo and then put the URL into the Firebase Authentication profile.
One place to keep such a profile picture would be Firebase Storage. See the documentation on how to upload an image from iOS and then generate a download URL that you store in the user profile.