Swift - Use of unresolved identifier 'self' / Use of unresolved identifier 'Meme' / Use of unresolved identifier 'memedImage' - ios

Question

I get the error message Use of unresolved identifier 'self' as well as the error message Use of unresolved identifier 'Meme'; did you mean 'time'? and Use of unresolved identifier 'memedImage' in Xcode. I am trying to make a MemeMaker and am having trouble creating a struct for the modified image of the meme. Here is my code:
import UIKit
class ViewController: UIViewController,
UIImagePickerControllerDelegate,
UINavigationControllerDelegate {
#IBOutlet weak var ImageView: UIImageView!
#IBOutlet weak var cameraButton: UIBarButtonItem!
#IBOutlet weak var topTextField: UITextField!
#IBOutlet weak var bottomTextField: UITextField!
let textFieldDelegate = TextFieldDelegate()
let memeTextAttributes:[NSAttributedString.Key: Any] = [
NSAttributedString.Key.strokeColor: UIColor.black,
NSAttributedString.Key.foregroundColor: UIColor.white,
NSAttributedString.Key.font: UIFont(name: "HelveticaNeue-
CondensedBlack", size: 40)!,
NSAttributedString.Key.strokeWidth: -3.5]
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
topTextField.textAlignment = .center
bottomTextField.textAlignment = .center
topTextField.text = "Top Text"
bottomTextField.text = "Bottom Text"
if UIImagePickerController.isSourceTypeAvailable(.camera) {
cameraButton.isEnabled = true
} else {
cameraButton.isEnabled = false
}
}
override func viewDidLoad() {
super.viewDidLoad()
//
UIImagePickerController().delegate = self
//
self.topTextField.delegate = textFieldDelegate
self.bottomTextField.delegate = textFieldDelegate
//
topTextField.defaultTextAttributes = memeTextAttributes
bottomTextField.defaultTextAttributes = memeTextAttributes
//
}
//Button to allow user pick an image from an Album
#IBAction func pickImageFromAlbum(_ sender: Any) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
//Allows user to use camera to take a photo
#IBAction func takeImageFromCamera(_ sender: Any) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .camera
present(imagePicker, animated: true, completion: nil)
}
#objc internal func imagePickerController(_ picker:
UIImagePickerController, didFinishPickingMediaWithInfo info: [String:
Any]) {
if let pickedImage =
info[convertFromUIImagePickerControllerInfoKey
(UIImagePickerController.InfoKey.originalImage)] as? UIImage {
ImageView.contentMode = .scaleToFill
ImageView.image = pickedImage
dismiss(animated: true, completion: nil)
}
}
}
func generateMemedImage() -> UIImage {
// Render view to an image
UIGraphicsBeginImageContext(self.UIView.frame.size)
//Use of unresolved identifier 'self'
UIView.drawHierarchy(in: self.UIView.frame, afterScreenUpdates:
true) //Use of unresolved identifier 'self'
let memedImage:UIImage =
UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return memedImage
}
func save() {
// Creates the meme
let meme = Meme(topText: topTextField.text!, bottomText:
bottomTextField.text!, originalImage: UIImageView.image!, memedImage:
memedImage) //Use of unresolved identifier 'memedImage'
}
// Helper function inserted by Swift 4.2 migrator.
fileprivate func convertFromUIImagePickerControllerInfoKey(_ input:
UIImagePickerController.InfoKey) -> String {
return input.rawValue
}

Answer 1

you have declared function in outside of the class and try to saying that this identifier is belongs to current class but there is no class for that function
generateMemedImage()

Answer 2

Let's concentrate on just one of the many problems with your code — the issue with self.
This is the structure of your code. This is your code; all I did here was cut most of it, leaving the structure clearly visible:
class ViewController: UIViewController,
UIImagePickerControllerDelegate, UINavigationControllerDelegate {
// ...
}
func generateMemedImage() -> UIImage {
UIGraphicsBeginImageContext(self.UIView.frame.size)
// ...
}
Your class declaration starts — and ends! Then comes a completely new function, func generateMemedImage. It is not inside the class declaration; it is just sitting out in the middle of nowhere. That's not illegal of itself; global functions are legal in Swift. But you cannot say self in a global function.
So the solution to that problem is to move the function inside the class declaration:
class ViewController: UIViewController,
UIImagePickerControllerDelegate, UINavigationControllerDelegate {
// ...
func generateMemedImage() -> UIImage {
UIGraphicsBeginImageContext(self.UIView.frame.size)
// ...
}
}

Answer 3

I think I can help, I would first declare your Meme class or struct at the top of the page:
struct Meme {
let topText: String!
let bottomText: String!
let originalImage: UIImage!
let memedImage: UIImage!
}
Then you need to change:
memedImage: memedImage
to:
memedImage: generatedMemedImage()
Here is how you have it:
func save() {
// Creates the meme
let meme = Meme(topText: topTextField.text!, bottomText:
bottomTextField.text!, originalImage: UIImageView.image!, memedImage:
memedImage) //Use of unresolved identifier 'memedImage'
}
Here is the solution:
func save() {
// Creates the meme
let meme = Meme(topText: topTextField.text!, bottomText:
bottomTextField.text!, originalImage: UIImageView.image!, memedImage:
**generatedMemedImage()**)
}
I hope this helps.