How can i get PHAsset from PHPickerResult? iOS 14

Question

So, I found similar questions asked before but when I tried the same way as what I got, and it does not work as I expected, so what I'm trying to do is, I want to get PHAsset from PHPickerResult from PHPickerViewController.

so experimenting it using this source as my base code, and combined it with what I got from this.

also already add "Privacy - Photo Library Usage Description" to the info.plist when i tried this.

The code look like this.

import UIKit
import PhotosUI

class ViewController: UIViewController {
    
    @IBOutlet weak var myImageView: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func buttonDidTap(_ sender: Any) {
        var configuration = PHPickerConfiguration()
        configuration.selectionLimit = 1
        configuration.filter = .any(of: [.images, .videos])
        
        let picker = PHPickerViewController(configuration: configuration)
        picker.delegate = self
        self.present(picker, animated: true, completion: nil)
    }
}

extension ViewController: PHPickerViewControllerDelegate {
    
    func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
        
        picker.dismiss(animated: true)
        let identifiers = results.compactMap(\.assetIdentifier)
        let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: identifiers, options: nil)
        fetchResult.enumerateObjects { (asset, index, stop) -> Void in
            PHImageManager.default().requestImage(for: asset,
                                                  targetSize: CGSize.init(width: 20, height: 20),
                                                  contentMode: PHImageContentMode.aspectFit,
                                                  options: nil) { (image: UIImage?, _: [AnyHashable : Any]?) in
                self.myImageView.image = image
            }
       }
    }
}

After I try to debug the code, I found out that the code inside fetchResult.enumerateObjects was not called that's why I can't get the image.

Or maybe I got the wrong syntax? can someone help me?

Answer 1

If you need an asset later, you have to initialize the configuration with the photo library. So this line is wrong:

var configuration = PHPickerConfiguration()

You want:

var configuration = PHPickerConfiguration(photoLibrary: PHPhotoLibrary.shared())