How to choose an image that will remain even after exiting the app - swift

Question

I need help please I have a button .. and UIImage without a picture for the user can choose a picture he wants!
And it's important that the user-selected image stays the same once the user is completely signed out of the app
I want the user to select a picture from the gallery or take a picture and then the picture he chose will be displayed on the profile picture and will not disappear even after exiting the application .. The data will be saved
Can I do this please?
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet var imageView: UIImageView!
#IBOutlet var chooseBuuton: UIButton!
var imagePicker = UIImagePickerController()
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!){
self.dismiss(animated: true, completion: { () -> Void in
})
imageView.image = image
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
imageView.image = image
imageView.contentMode = .scaleAspectFill
dismiss(animated: true, completion: nil)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let controller = UIImagePickerController()
controller.delegate = self
controller.sourceType = .photoLibrary
present(controller, animated: true, completion: nil)
}
}

Answer 1

You need to save image in Application storage like UserDefaults, Document directory or in DB if you are using in Application.
Preferably images are saving to Application document directory, you can use below method to save image:
func saveImage(image : UIImage, imageName: String){
let documentDirectoryPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let fileURL = documentDirectoryPath.appendingPathComponent(imageName)
if let data = UIImageJPEGRepresentation(image, 1.0),
!FileManager.default.fileExists(atPath: fileURL.path) {
do {
try data.write(to: fileURL)
print("Image saved")
} catch {
print("Image save error:", error)
}
}
}
You can get back image via below function:
func getImage(imageName: String) -> UIImage?{
let documentDirectoryPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let fileURL = documentDirectoryPath.appendingPathComponent(imageName)
let image = UIImage(contentsOfFile: fileURL.path)
return image
}
In your UIImagePickerControllerDelegate delegate method call function saveImage with image & imageName to save image in document directory permanently:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
// Do your stuff here, then save image to document directory:
saveImage(image:image, imageName: "profile.jpg")
}
To show image on your imageView get image from document directory in your viewDidLoad function:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
if let image = getImage(imageName: "profile.jpg"){
imageview.image = image
}
}