Я создаю приложение программно (с первой попытки). Мне удалось создать представление коллекции, и при нажатии кнопки добавления на панели навигации появляется новая ячейка. Я хочу иметь возможность сделать все созданные ячейки доступными для редактирования (другими словами, показывать кнопку удаления на ячейках) при нажатии кнопки редактирования на панели навигации. В настоящее время, независимо от того, что я пробую, нажимаю я на редактирование или нет, ничего не происходит. Я попытался скрыть UIImage кнопки, а также кнопки, вызвав функцию, созданную в классе ячейки, при нажатии кнопки редактирования, а также попытался переместить эту функцию в класс ViewController, приложение запускается, но код не делает то, что это должно быть.
Мой код:
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")
}
}
Кнопка редактирования на ячейках, которая не исчезает