Edit collectionView Cells in UICollectionView - swift

Question

I am creating an app programitcally (on my first try). I have managed to create a collection view and on the click of the add button in the navigation bar a new cell appears. I want to be able to set all cells created to be editable (in other words show the delete button on the cells) when the edit button in the navigation bar is clicked. Currently no matter what I try whether I click on edit or not, nothing happens. I have tried hiding the UIImage of the button as well as the button by calling a function created in the cell class when the edit button is clicked and have also tried moving this function to the ViewController Class, app runs but code doesn't do what it is supposed to.
My Code:
class CollectionViewController: UICollectionViewController, UITextViewDelegate {
// decelrations of variables for use
let cell = ListCell()
let cellId = "cellId"
var numberOfLists = 0
var lists = [String]()
let secondVC = TableViewController()
// for learning purposes: codes sets up the view programitcally along with what is in scenedelagate
override func viewDidLoad() {
super.viewDidLoad()
setCollectionView()
}
//Function that will generate the collectionView
func setCollectionView() {
collectionView.register(ListCell.self, forCellWithReuseIdentifier: cellId)
collectionView.backgroundColor = .white
navigationItem.title = "Lists"
navigationController?.navigationBar.barTintColor = UIColor(white: 200/255, alpha: 1)
navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white, .font: UIFont.boldSystemFont(ofSize: 20)]
navigationItem.leftBarButtonItem = editButtonItem
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
collectionView.delegate = self //runs the delegate flow methods
collectionView.dataSource = self
}
// to do with enabling editing in CV - function tied to edit button
override func setEditing(_ editing: Bool, animated: Bool){
super.setEditing(editing, animated: animated)
if editing {
print ("Editing Mode Enabled")
//cell.showButton()
} else {
print ("Editing Mode Closed")
}
// reloads the view after code is performed
self.collectionView.reloadData()
}
// func when buttons are tapped to add a collection view
#objc func addTapped() {
print("This button should not crash")
numberOfLists += 1
navigationController?.pushViewController(secondVC, animated: true)
collectionView.reloadData()
}
}
// the following block of code has to do with the set up of the collectionView
extension CollectionViewController: UICollectionViewDelegateFlowLayout {
// this code should speficiy how many cells you are going to have in your collectionview
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return numberOfLists
}
// this code lets you reuse a cell
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath)-> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! ListCell
cell.deleteButton.setImage(UIImage.init(named: "delete"), for: .normal)
return cell
}
// this code sets the sizing of the cells
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (view.frame.width / 2) - 16, height: 100)
}
// where to place the cell on the screen
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 8, left: 9, bottom: 8, right: 8)
}
// this function just checks to see if the cell is selected
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
navigationController?.pushViewController(secondVC, animated: true)
}
}
//this class sets up the collectionViewCell
class ListCell: UICollectionViewCell {
override init(frame: CGRect) {
super.init(frame: frame)
setupCell()
}
fileprivate func setupCell(){
let colors = cellRandomBackgroundColors()
self.backgroundColor = colors[0]
self.addSubview(listNameLabel)
roundCorner()
setCellShadow()
self.addSubview(deleteButton)
deleteButton.addTarget(self, action: #selector(deleteCell), for: .touchUpInside)
}
#objc func deleteCell() {
print ("this button works")
}
func showButton() {
deleteButton.isHidden = true
print ("this is supposed to work")
}
func roundCorner() {
self.contentView.layer.cornerRadius = 50.0
self.contentView.layer.masksToBounds = true
self.contentView.layer.borderWidth = 1.0
self.contentView.layer.borderColor = UIColor.clear.cgColor
}
func setCellShadow() {
self.layer.shadowColor = UIColor.black.cgColor
self.layer.shadowOffset = CGSize(width: 0, height: 1)
self.layer.shadowOpacity = 0.2
self.layer.shadowRadius = 1.0
self.layer.masksToBounds = false
self.layer.cornerRadius = 3
self.clipsToBounds = false
}
func cellRandomBackgroundColors() -> [UIColor] {
//Colors
let red = [#colorLiteral(red: 0.9654200673, green: 0.1590853035, blue: 0.2688751221, alpha: 1),#colorLiteral(red: 0.7559037805, green: 0.1139892414, blue: 0.1577021778, alpha: 1)]
let orangeRed = [#colorLiteral(red: 0.9338900447, green: 0.4315618277, blue: 0.2564975619, alpha: 1),#colorLiteral(red: 0.8518816233, green: 0.1738803983, blue: 0.01849062555, alpha: 1)]
let orange = [#colorLiteral(red: 0.9953531623, green: 0.54947716, blue: 0.1281470656, alpha: 1),#colorLiteral(red: 0.9409626126, green: 0.7209432721, blue: 0.1315650344, alpha: 1)]
let yellow = [#colorLiteral(red: 0.9409626126, green: 0.7209432721, blue: 0.1315650344, alpha: 1),#colorLiteral(red: 0.8931249976, green: 0.5340107679, blue: 0.08877573162, alpha: 1)]
let green = [#colorLiteral(red: 0.3796315193, green: 0.7958304286, blue: 0.2592983842, alpha: 1),#colorLiteral(red: 0.2060100436, green: 0.6006633639, blue: 0.09944178909, alpha: 1)]
let greenBlue = [#colorLiteral(red: 0.2761503458, green: 0.824685812, blue: 0.7065336704, alpha: 1),#colorLiteral(red: 0, green: 0.6422213912, blue: 0.568986237, alpha: 1)]
let kindaBlue = [#colorLiteral(red: 0.2494148612, green: 0.8105323911, blue: 0.8425348401, alpha: 1),#colorLiteral(red: 0, green: 0.6073564887, blue: 0.7661359906, alpha: 1)]
let skyBlue = [#colorLiteral(red: 0.3045541644, green: 0.6749247313, blue: 0.9517192245, alpha: 1),#colorLiteral(red: 0.008423916064, green: 0.4699558616, blue: 0.882807076, alpha: 1)]
let blue = [#colorLiteral(red: 0.1774400771, green: 0.466574192, blue: 0.8732826114, alpha: 1),#colorLiteral(red: 0.00491155684, green: 0.287129879, blue: 0.7411141396, alpha: 1)]
let bluePurple = [#colorLiteral(red: 0.4613699913, green: 0.3118675947, blue: 0.8906354308, alpha: 1),#colorLiteral(red: 0.3018293083, green: 0.1458326578, blue: 0.7334778905, alpha: 1)]
let purple = [#colorLiteral(red: 0.7080290914, green: 0.3073516488, blue: 0.8653779626, alpha: 1),#colorLiteral(red: 0.5031493902, green: 0.1100070402, blue: 0.6790940762, alpha: 1)]
let pink = [#colorLiteral(red: 0.9495453238, green: 0.4185881019, blue: 0.6859942079, alpha: 1),#colorLiteral(red: 0.8123683333, green: 0.1657164991, blue: 0.5003474355, alpha: 1)]
let colorsTable: [Int: [UIColor]] = [0: red, 1: orangeRed, 2: orange, 3: yellow, 4: green, 5: greenBlue, 6: kindaBlue, 7: skyBlue, 8: blue, 9: bluePurple, 10: bluePurple, 11: purple, 12: pink]
let randomColors = colorsTable.values.randomElement()
return randomColors!
}
let deleteButton: UIButton = {
let deleteButton = UIButton(frame: CGRect(x:2,y:2,width:70,height:30))
return deleteButton
}()
let listNameLabel: UILabel = {
let listLabel = UILabel(frame: CGRect(x:2,y:50,width:70,height:30))
listLabel.text = "Data entry on Second View"
listLabel.font = UIFont.boldSystemFont(ofSize: 12)
listLabel.backgroundColor = .green
listLabel.translatesAutoresizingMaskIntoConstraints = false
listLabel.tag = 1
return listLabel
}()
let iconImageView: UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "Folder")
imageView.contentMode = .scaleAspectFit
return imageView
}()
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Edit Button on Cells that doesn't disappear