Swift - UIImagePickerController - how to use it?

You're grabbing a UIImage named UIImagePickerControllerOriginalImage and there exists no such image. You're meant to grab the UIImage with the key UIImagePickerControllerOriginalImage from the editingInfo dictionary:

let tempImage = editingInfo[UIImagePickerControllerOriginalImage] as! UIImage

Details

• Xcode 11.4.1 (11E503a), Swift 5.2

More

How to build own photo picker

Solution

import UIKitimport AVFoundationimport Photosprotocol ImagePickerDelegate: class {    func imagePicker(_ imagePicker: ImagePicker, grantedAccess: Bool,                     to sourceType: UIImagePickerController.SourceType)    func imagePicker(_ imagePicker: ImagePicker, didSelect image: UIImage)    func cancelButtonDidClick(on imageView: ImagePicker)}class ImagePicker: NSObject {    private weak var controller: UIImagePickerController?    weak var delegate: ImagePickerDelegate? = nil    func dismiss() { controller?.dismiss(animated: true, completion: nil) }    func present(parent viewController: UIViewController, sourceType: UIImagePickerController.SourceType) {        let controller = UIImagePickerController()        controller.delegate = self        controller.sourceType = sourceType        self.controller = controller        DispatchQueue.main.async {            viewController.present(controller, animated: true, completion: nil)        }    }}// MARK: Get access to camera or photo libraryextension ImagePicker {    private func showAlert(targetName: String, completion: ((Bool) -> Void)?) {        DispatchQueue.main.async { [weak self] in            guard let self = self else { return }            let alertVC = UIAlertController(title: "Access to the \(targetName)",                                            message: "Please provide access to your \(targetName)",                                            preferredStyle: .alert)            alertVC.addAction(UIAlertAction(title: "Settings", style: .default, handler: { action in                guard   let settingsUrl = URL(string: UIApplication.openSettingsURLString),                        UIApplication.shared.canOpenURL(settingsUrl) else { completion?(false); return }                UIApplication.shared.open(settingsUrl, options: [:]) { [weak self] _ in                    self?.showAlert(targetName: targetName, completion: completion)                }            }))            alertVC.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { _ in completion?(false) }))            UIApplication.shared.windows.filter { $0.isKeyWindow }.first?                .rootViewController?.present(alertVC, animated: true, completion: nil)        }    }    func cameraAsscessRequest() {        if delegate == nil { return }        let source = UIImagePickerController.SourceType.camera        if AVCaptureDevice.authorizationStatus(for: .video) ==  .authorized {            delegate?.imagePicker(self, grantedAccess: true, to: source)        } else {            AVCaptureDevice.requestAccess(for: .video) { [weak self] granted in                guard let self = self else { return }                if granted {                    self.delegate?.imagePicker(self, grantedAccess: granted, to: source)                } else {                    self.showAlert(targetName: "camera") { self.delegate?.imagePicker(self, grantedAccess: $0, to: source) }                }            }        }    }    func photoGalleryAsscessRequest() {        PHPhotoLibrary.requestAuthorization { [weak self] result in            guard let self = self else { return }            let source = UIImagePickerController.SourceType.photoLibrary            if result == .authorized {                DispatchQueue.main.async { [weak self] in                    guard let self = self else { return }                    self.delegate?.imagePicker(self, grantedAccess: result == .authorized, to: source)                }            } else {                self.showAlert(targetName: "photo gallery") { self.delegate?.imagePicker(self, grantedAccess: $0, to: source) }            }        }    }}// MARK: UINavigationControllerDelegateextension ImagePicker: UINavigationControllerDelegate { }// MARK: UIImagePickerControllerDelegateextension ImagePicker: UIImagePickerControllerDelegate {    func imagePickerController(_ picker: UIImagePickerController,                               didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {        if let image = info[.editedImage] as? UIImage {            delegate?.imagePicker(self, didSelect: image)            return        }        if let image = info[.originalImage] as? UIImage {            delegate?.imagePicker(self, didSelect: image)        } else {            print("Other source")        }    }    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {        delegate?.cancelButtonDidClick(on: self)    }}

Full Usage

Info.plist

 <key>NSPhotoLibraryUsageDescription</key> <string>bla-bla-bla</string> <key>NSCameraUsageDescription</key> <string>bla-bla-bla</string>

ViewController (do not forget to paste solution code)

import UIKitclass ViewController: UIViewController {    private weak var imageView: UIImageView!    private lazy var imagePicker: ImagePicker = {        let imagePicker = ImagePicker()        imagePicker.delegate = self        return imagePicker    }()    override func viewDidLoad() {        super.viewDidLoad()        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "camera", style: .plain, target: self,                                                           action: #selector(cameraButtonTapped))        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "photo", style: .plain, target: self,                                                           action: #selector(photoButtonTapped))        let imageView = UIImageView(frame: CGRect(x: 40, y: 80, width: 200, height: 200))        imageView.backgroundColor = .lightGray        view.addSubview(imageView)        self.imageView = imageView    }    @objc func photoButtonTapped(_ sender: UIButton) { imagePicker.photoGalleryAsscessRequest() }    @objc func cameraButtonTapped(_ sender: UIButton) { imagePicker.cameraAsscessRequest() }}// MARK: ImagePickerDelegateextension ViewController: ImagePickerDelegate {    func imagePicker(_ imagePicker: ImagePicker, didSelect image: UIImage) {        imageView.image = image        imagePicker.dismiss()    }    func cancelButtonDidClick(on imageView: ImagePicker) { imagePicker.dismiss() }    func imagePicker(_ imagePicker: ImagePicker, grantedAccess: Bool,                     to sourceType: UIImagePickerController.SourceType) {        guard grantedAccess else { return }        imagePicker.present(parent: self, sourceType: sourceType)    }}

Images

import MobileCoreServicesclass SecondViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate {   @IBOutlet var img:UIImageView!=nil   override func viewDidLoad() {        super.viewDidLoad()   }   override func didReceiveMemoryWarning()    {       super.didReceiveMemoryWarning()   }   @IBAction func buttonTapped(AnyObject)   {     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary){            println("Button capture")            var imag = UIImagePickerController()            imag.delegate = self            imag.sourceType = UIImagePickerControllerSourceType.PhotoLibrary;            //imag.mediaTypes = [kUTTypeImage];            imag.allowsEditing = false            self.presentViewController(imag, animated: true, completion: nil)        }   }   func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {        let selectedImage : UIImage = image       //var tempImage:UIImage = editingInfo[UIImagePickerControllerOriginalImage] as UIImage        img.image=selectedImage        self.dismissViewControllerAnimated(true, completion: nil)       } }