ImagePicker.swift

import SwiftUI
import Photos

public struct ImagePicker: UIViewControllerRepresentable {

    private let sourceType: UIImagePickerController.SourceType
    private let onImagePicked: (Data) -> Void
    @Environment(\.presentationMode) private var presentationMode

    init(sourceType: UIImagePickerController.SourceType, onImagePicked: @escaping (Data) -> Void) {
        self.sourceType = sourceType
        self.onImagePicked = onImagePicked
    }

    public func makeUIViewController(context: Context) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.sourceType = self.sourceType
        picker.delegate = context.coordinator
        return picker
    }

    public func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}

    public func makeCoordinator() -> Coordinator {
        Coordinator(
            onDismiss: { self.presentationMode.wrappedValue.dismiss() },
            onImagePicked: self.onImagePicked
        )
    }

    final public class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

        private let onDismiss: () -> Void
        private let onImagePicked: (Data) -> Void

        init(onDismiss: @escaping () -> Void, onImagePicked: @escaping (Data) -> Void) {
            self.onDismiss = onDismiss
            self.onImagePicked = onImagePicked
        }

        public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
              // get permission from user
            let status = PHPhotoLibrary.authorizationStatus()
            if status == .notDetermined {
                PHPhotoLibrary.requestAuthorization({status in})
            }

            // get image PHAsset
            guard let asset = info[UIImagePickerController.InfoKey.phAsset] as? PHAsset else {
                print("error: user permission not open!")
                return
            }

            let imageManager = PHImageManager.default()
            imageManager.requestImageDataAndOrientation(for: asset, options: nil) { data, _, _, _ in
                if let data = data, let uiImage = info[.originalImage] as? UIImage {
                    // get your image data and uiimage
                    self.onImagePicked(uiImage.jpegData(compressionQuality: 1)!)
                } else {
                    print("error: get image failed")
                }
            }
            self.onDismiss()
        }

        public func imagePickerControllerDidCancel(_: UIImagePickerController) {
            self.onDismiss()
        }
    }
}