Как бы я удалил изображение из моей коллекции изображений?Во-вторых, как бы я выбрал несколько изображений и либо поднял вид с опциями обмена, либо смог бы удалить их из представления коллекции?Я относительно новичок в программировании, и если у кого-то есть решение или он знает лучший способ сделать это, пожалуйста, ответьте, так как это было бы очень полезно.Спасибо.
class ViewController: UICollectionViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UICollectionViewDelegateFlowLayout {
@IBOutlet weak var imageViewTwo: UIImageView!
var imageArray = [UIImage]()
override func viewDidLoad() {
super.viewDidLoad()
imageViewTwo.isHidden = true
}
@IBAction func chooseImage(_ sender: UIBarButtonItem) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
let actionSheet = UIAlertController(title: "Photo Source", message: "Choose a Source", preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (action: UIAlertAction) in
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePickerController.sourceType = .camera
self.present(imagePickerController, animated: true, completion: nil)
} else {
print("Camera is not available.")
}
}))
actionSheet.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: { (action: UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
self.present(imagePickerController, animated: true, completion: nil)
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
imageViewTwo.image = image
imageArray.append(imageViewTwo.image!)
collectionView.reloadData()
picker.dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return imageArray.count
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
let imageView = cell.viewWithTag(1) as! UIImageView
imageView.image = imageArray[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width / 3 - 1
return CGSize(width: width, height: width)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
var itemsSelected = [IndexPath]()
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
collectionView.allowsMultipleSelection = true
if !(itemsSelected.contains(indexPath)) {
itemsSelected.append(indexPath)
}
}
@IBAction func deletePressed(_ sender: UIBarButtonItem) {
itemsSelected.forEach {
imageArray.remove(at:$0.row)
}
collectionView.deleteItems(at:itemsSelected)
itemsSelected.removeAll()
}
}