Set background of another view in swift

Question

I'd like to let the user chose a background for the main view of the app. I'd like to know how I can do that for another view, even if the app is killed.

I thought about saving the path of the image in Userdefaults and then get it from the main view, but I'm not able to set the background from an asset URL. Is there a way to do this ? Or a better way maybe ?

Here is what I've done so far:

@IBOutlet weak var imageView: UIImageView!
var imagePicker = UIImagePickerController()

@IBAction func background(_ sender: Any) {
    self.imagePicker.allowsEditing = false
    self.imagePicker.sourceType = .savedPhotosAlbum

    imagePicker.modalPresentationStyle = .overCurrentContext
    self.present(imagePicker, animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {

        self.imageView.contentMode = .scaleAspectFit
        let imageUrl = info[UIImagePickerControllerReferenceURL] as! URL
        UserDefaults.standard.set(imageUrl, forKey: "background")
        imageView.image = pickedImage

    }

    dismiss(animated: true, completion: nil)

}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    self.imagePicker = UIImagePickerController()
    dismiss(animated: true, completion: nil)
}

How about saving image data to `CoreData` – sCha Sep 19 '17 at 09:42 — sCha, Sep 19 '17 at 09:42
@sCha Don't know how to use `CoreData`... Never used that. – Hawkydoky Sep 19 '17 at 09:45 — Hawkydoky, Sep 19 '17 at 09:45

score 3 · Answer 1 · answered Sep 19 '17 at 09:42

3

How about loading URL from defaults in viewDidLoad() and then call setImageFromURL? Of course you have to set the image to your ImageView

func setImageFromURl(stringImageUrl url: String){

      if let url = NSURL(string: url) {
         if let data = NSData(contentsOf: url as URL) {
            self.image = UIImage(data: data as Data)
         }
      }
   }

answered Sep 19 '17 at 09:42

chris.breezy

31
5

In fact... I think I've a problem with the URL. It find nothing (`nil`) when looking for the URL I have. – Hawkydoky Sep 19 '17 at 10:54
@Hawkydoky maybe you've to allow ArbitraryLoads in your ProjectSettings. (not recommended if you want to publish your app) – chris.breezy Sep 19 '17 at 11:22
@Moritz the example handles a local URL. In my opinion no need for URLSession – chris.breezy Sep 19 '17 at 11:23
@chris.breezy Right. I didn't notice that. Thanks. – Eric Aya Sep 19 '17 at 11:24
finally, i used this answer to get me through this. Thanks for your help. https://stackoverflow.com/a/35685943/5385397 – Hawkydoky Sep 19 '17 at 11:33

Set background of another view in swift

1 Answers1