URL array throwing optional error swift - arrays

Question

I am not sure how to resolve the optional type error that occurs at "if let imageURL = imageFile.path" in my code below. The error it throws is "Initializer for conditional binding must have Optional type, not 'String'"
After googling, I'm guessing it has something to do with the directoryContentsArray = URL I set at the beginning of my CollectionViewController class.
Please help!
P.S. Sorry for the repeat optional error question, but I'm super confused :/
class CollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var directoryContentsArray = [URL]()
fileprivate let itemsPerRow: CGFloat = 3
fileprivate let sectionInsets = UIEdgeInsets(top: 50.0, left: 20.0, bottom: 50.0, right: 20.0)
#IBOutlet weak var collectionView: UICollectionView! { didSet {
collectionView.delegate = self
collectionView.dataSource = self
}
}
override func viewDidLoad() {
super.viewDidLoad()
func fetchDirectoryContents() {
let fileManager = FileManager.default
let documentDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask)[0]
let directoryContents = try! fileManager.contentsOfDirectory(at: documentDirectory, includingPropertiesForKeys: nil)
self.directoryContentsArray = directoryContents
self.collectionView.reloadData()
}
checkPhotoLibraryPermission()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.collectionView.reloadData()
}
//number of views
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return directoryContentsArray.count
}
//populate the views
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? myCell {
let imageFile = self.directoryContentsArray[indexPath.item]
if let imageURL = imageFile.path,
imageFile.pathExtension == "jpeg",
let image = UIImage(contentsOfFile: imageURL) {
cell.myImageView.image = image
} else {
fatalError("Can't create image from file \(imageFile)")
}
return cell
}
return UICollectionViewCell()
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let imageURL = info[UIImagePickerControllerImageURL] as? URL {
let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
try FileManager.default.moveItem(at: imageURL.standardizedFileURL, to: documentDirectory.appendingPathComponent(imageURL.lastPathComponent))
collectionView.reloadData()
} catch {
print(error)
}
}
picker.dismiss(animated: true, completion: nil)
}
Thanks again!

Answer 1

The definition of the path property of URL is:
var path: String
So it doesn't return an optional which means you don't need to do the let assignment.
Just change to this:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? myCell {
let imageFile = self.directoryContentsArray[indexPath.item]
if imageFile.pathExtension == "jpeg",
let image = UIImage(contentsOfFile: imageFile.path) {
cell.myImageView.image = image
} else {
fatalError("Can't create image from file \(imageFile)")
}
return cell
}
return UICollectionViewCell()
}