Project 3 view controller - code next iOS club

ViewController.swift

import UIKit

class ViewController: UICollectionViewController, UIImagePickerControllerDelegate & UINavigationControllerDelegate {

    var people = [Person]()
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self,
        action: #selector(addNewPerson))

        
    }
    
    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        // getting the person that was selected
        let person = people[indexPath.item]
        let ac = UIAlertController(title: "Rename person", message: nil,  preferredStyle: .alert)
        // Adding a text field for the person to input their new name
        ac.addTextField()
        ac.addAction(UIAlertAction(title: "Cancel", style: .cancel)) // Adding a cancel button
        ac.addAction(UIAlertAction(title: "OK", style: .default) { [weak self, weak ac] _ in
            guard let newName = ac?.textFields?[0].text else { return }
            person.name = newName
            self?.collectionView.reloadData()
        })
        present(ac, animated: true)
    
    }
    
    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return people.count

    }
    
    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell  {
        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Person", for:
        indexPath) as? PersonCell else {
        // we failed to get a PersonCell – bail out!
        fatalError("Unable to  dequeue PersonCell.")
        }
        
        let person = people[indexPath.item] // pulls out a person in the correct position
        cell.name.text = person.name // sets the name
        
        // gets the right path for the image
        let path = getDocumentsDirectory().appendingPathComponent(person.image)
                        
        // creates an image from the provided path
        cell.imageView.image = UIImage(contentsOfFile: path.path)
        
        // gives it a grey border
        cell.imageView.layer.borderColor = UIColor(white: 0, alpha: 0.3).cgColor
        cell.imageView.layer.borderWidth = 2
        // rounds the corners of the image
        cell.imageView.layer.cornerRadius = 3
        // rounds the corners of the cell
        cell.layer.cornerRadius = 7


    // if we're still here it means we got a PersonCell, so we can return it
    return cell
        
    }

    @objc func addNewPerson(){
        
        let picker = UIImagePickerController()
        picker.allowsEditing = true // allows the user to crop the picture they select
        picker.delegate = self  // Means this class will be handling the picture selection
        present(picker, animated: true)


    }
    
     func  imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any] ) {
        guard let image = info[.editedImage] as? UIImage else { return }
        let imageName = UUID().uuidString
         
         let imagePath = getDocumentsDirectory().appendingPathComponent(imageName)
             if let jpegData = image.jpegData(compressionQuality: 0.8) {
         try? jpegData.write(to: imagePath)
              }
         dismiss(animated: true)
         
         let person = Person(name: "Unknown", image: imageName)
         people.append(person)
         collectionView.reloadData()


        }
    
    
    func getDocumentsDirectory() -> URL {
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    return paths[0]
    }

}