convert sandbox img url to UIImage

Question

I saved the image URL in userdefault, and then I read it, but I can't view it inside UIImageView

print("UserDefaults url: \(String(describing: defaults.url(forKey: "urlPhoto")))")

file:///var/mobile/Containers/Data/Application/HI5648UUU-B7777-9999-4444-KUG6546848/Documents/landscape.png

@IBOutlet weak var photoUser: UIImageView!

photoUser.image = (defaults.data(forKey: "urlPhoto") ?? UIImage(named: "photoPlaceholder")) as? Data

if userdefault is empty then load photoPlaceholder

Answer 1

You shouldn't do that, because the path of the URL HI5648UUU-B7777-9999-4444-KUG6546848 always changes after each launch.

The better approach is to cache the suffix and the file extension only, which in this case is landscape.png, to .documentDirectory. And then load it with:

let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first
let urlPhoto = UserDefaults.standard.string(forKey: "urlPhoto")
if let urlPhoto, let fullPath = documentDirectory?.appendingPathComponent(urlPhoto) {
    return UIImage(contentsOfFile: fullPath.path)
} else {
    return UIImage(named: "photoPlaceholder")
}