how to save UIImage to UserDefaults in swift 5 [duplicate] - ios

Question

This question already has answers here:
Save images in NSUserDefaults?
(13 answers)
Closed 9 months ago.
I'm trying to save users image to userDefaults but i'm always getting error "Thread 1: "Attempt to insert non-property list object (Function) for key savedimage" Here's my code
import UIKit
class productSelectionPage: UIViewController {
#IBOutlet weak var productImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Save image
let image = UIImage(named: "user")
let imageData = UIImage.jpegData(image)
UserDefaults.standard.setValue(imageData, forKey: "savedImage")
}
#IBAction func offerButtonTapped(_ sender: UIButton) {
// present image
let imageData = UserDefaults.standard.object(forKey: "savedImage")
let image = UIImage(data: (imageData as! NSData) as Data)
productImageView.image = image
// crash
}
}

Answer 1

Try to use PropertyListEncoder() and Decoder like this:
func saveImage() {
guard let data = UIImage(named: "image").jpegData(compressionQuality: 0.5) else { return }
let encoded = try! PropertyListEncoder().encode(data)
UserDefaults.standard.set(encoded, forKey: "KEY")
}
func loadImage() {
guard let data = UserDefaults.standard.data(forKey: "KEY") else { return }
let decoded = try! PropertyListDecoder().decode(Data.self, from: data)
let image = UIImage(data: decoded)
}

Answer 2

If you have ever used firebase, you would understand that all images and videos are saved as data, not as pixels.
A similar approach is taken when saving to UserDefaults
// storing the image data
private func store(image: UIImage, forKey key: String, withStorageType storageType: StorageType) {
if let pngRepresentation = image.pngData() {
UserDefaults.standard.set(pngRepresentation, forKey: key)
}
}
// retrieving the image data and getting an image
To retrieve it, we will take that image data
private func retrieveImage(forKey key: String, inStorageType storageType: StorageType) -> UIImage? {
if let imageData = UserDefaults.standard.object(forKey: key) as? Data,
let image = UIImage(data: imageData) {
return image
}
}
}

Answer 3

You can just simply convert Image into Data as shown in the extension for UIImageView like below code
//MARK: -|||-To Store Image in Userdefault You can just Simply create an uiimageview extension-||| -
extension UIImageView{
func saveImage(){
guard let image = self.image, let data = image.jpegData (compressionQuality: 0.5) else { return }
let encoded = try! PropertyListEncoder ().encode (data)
UserDefaults.standard.set(encoded, forKey: "image")
}
func loadImage() {
guard let data = UserDefaults.standard.data(forKey: "image") else { return }
let decoded = try! PropertyListDecoder().decode(Data.self, from: data)
let image = UIImage(data: decoded)
self.image = image
}
}
Here is how to use this extension:
class ViewController: UViewController {
#IBOutlet var sendImg: UIImageView!
#IBOutlet var receiveImg: UlImageView!
override func viewDidLoad(){
super.viewDidLoad() {
sendImg.saveImage()
}
#IBAction func loadImageFromUserDefault(_ sender: UIButton) {
receiveImg.loadImage()
}
}
to save image in UserDefault:
yourImage.saveImage()
to get image from UserDefault:
yourImage.loadImage()