Setting picked image from UIImagePicker to UIImageView in Swift

Question

I'm trying to create code so that a user can set an image from their Library or from their Camera Roll and have it set to a ImageView on the screen.

I tried adding this function, however it doesn't seem to work

private func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        picker.dismiss(animated: true, completion: nil)
        //You will get cropped image here..
        if let image = info[editedImage] as UIImage
        {
            self.Picture.image = image
        }
    }

Here is my code as of right now

class NewViewController: UIViewController, UIImagePickerControllerDelegate {

    @IBOutlet var Picture: UIImageView! //the image I am trying to change 

    let imagepicker = UIImagePickerController()

@IBAction func ImagePicker(_ sender: Any) {
        let alert = UIAlertController(title: "Photo", message: "Would you like to choose a picture from your libray, or take a new photo?", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: { action in
            switch action.style{
            case .default:
                self.imagepicker.sourceType = .photoLibrary
                self.imagepicker.allowsEditing = true
                self.imagepicker.delegate = self
                self.present(self.imagepicker, animated: true)
                print("default")

            case .cancel:
                print("cancel")

            case .destructive:
                print("destructive")
            }}))
        alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: { action in
            switch action.style{
            case .default:
                self.imagepicker.sourceType = .camera
                self.imagepicker.allowsEditing = true
                self.imagepicker.delegate = self
                self.present(self.imagepicker, animated: true)

                print("default")

            case .cancel:
                print("cancel")

            case .destructive:
                print("destructive")
            }}))
        self.present(alert, animated: true, completion: nil)
    }
}

Answer 1

You need to change the method signature as,

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    picker.dismiss(animated: true, completion: nil)
    guard let image = info[.editedImage] as? UIImage else { return }
    self.Picture.image = image
} 

You can check the method signature here. Currently the method you have is not getting called by the UIImagePickerController delegate because of the wrong parameters. If you remove private keyword from the method, you will get a warning as below which means it looks like the same method but isn't what UIImagePickerController delegate will call.

Instance method 'imagePickerController(:didFinishPickingMediaWithInfo:)' nearly matches optional requirement 'imagePickerController(:didFinishPickingMediaWithInfo:)' of protocol 'UIImagePickerControllerDelegate'