Xcode – image picker/UIImagePickerController show blank screen/NavigationController swift 5

Try to follow my programmatically example below, first add your button and delegates to your controller and import Photo framework:

import UIKit
import Photos

class YourViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

lazy var takePicButton: UIButton = {
    let button = UIButton()
    button.backgroundColor = .red
    button.setTitle("Present img picker", for: .normal)
    button.setTitleColor(.white, for: .normal)
    button.titleLabel?.font = .systemFont(ofSize: 16, weight: .semibold)
    button.layer.cornerRadius = 14
    button.clipsToBounds = true
    button.addTarget(self, action: #selector(handlepickPicture), for: .touchUpInside)
    button.translatesAutoresizingMaskIntoConstraints = false
    
    return button
}()

now in viewDidLoad add button and set constraints:

override func viewDidLoad() {
    super.viewDidLoad()
    
    view.addSubview(takePicButton)
    takePicButton.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 20).isActive = true
    takePicButton.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 20).isActive = true
    takePicButton.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -20).isActive = true
    takePicButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
}

After that set your func to present image picker controller:

var imagePicker = UIImagePickerController()

@objc fileprivate func handlepickPicture() {
    
    imagePicker.delegate = self
    imagePicker.sourceType = .photoLibrary
    imagePicker.view.tintColor = .white
    imagePicker.mediaTypes = ["public.image"]
    imagePicker.allowsEditing = true
    imagePicker.navigationBar.barTintColor = .black
    
    checkPermission()
}

check the permission, don’t forget to set your info.plist privacy usage description (like you):

fileprivate func checkPermission() {
    let photoAuthorizationStatus = PHPhotoLibrary.authorizationStatus()
    switch photoAuthorizationStatus {
    case .authorized:
        print("Add Photo")
        if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum){
            print("Access is granted by user")
            self.present(imagePicker, animated: true, completion: nil)
        }
        print("Access is granted by user")
    case .notDetermined:
        PHPhotoLibrary.requestAuthorization({
            (newStatus) in
            print("status is (newStatus)")
            if newStatus ==  PHAuthorizationStatus.authorized {
                /* do stuff here */
                DispatchQueue.main.async {
                    self.present(self.imagePicker, animated: true, completion: nil)
                }
                print("success")
            }
        })
        print("It is not determined until now")
    case .restricted:
        // same same
        print("User do not have access to photo album.")
        goToSetting()
    case .denied:
        // same same
        print("Text tapped...")
        goToSetting()
        print("User has denied the permission.")
    case .limited:
        goToSetting() // the function show an alert to enable Authorization manually
        print("User has denied the permission.")
    @unknown default:
        fatalError()
    }
}

write the function to set authorization manually:

fileprivate func goToSetting() {
    let title = "Oooooops!"
    let message = "Hi man, for use this App press Go To settings and enabled access to Pohto Gallery... Check read and write option and relaunch the App!"
    
    let alertController = UIAlertController(title: "", message: "", preferredStyle: .alert)
    
    let subview = (alertController.view.subviews.first?.subviews.first?.subviews.first!)! as UIView
    subview.backgroundColor = UIColor(white: 0, alpha: 0.2)
    
    alertController.setValue(NSAttributedString(string: title, attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 18, weight: .heavy),NSAttributedString.Key.foregroundColor : UIColor.red]), forKey: "attributedTitle")
    alertController.setValue(NSAttributedString(string: message, attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 14, weight: .regular),NSAttributedString.Key.foregroundColor : UIColor.white]), forKey: "attributedMessage")
    
    let cancelAction = UIAlertAction(title: "Cancel", style: .destructive) { (_) in
        print("Action cancelled")
    }
    
    let goToSettingPermission = UIAlertAction(title: "Go To setting", style: .default) { (action) in
        UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!, options: [:], completionHandler: nil)
    }
    
    alertController.addAction(goToSettingPermission)
    alertController.addAction(cancelAction)
    
    self.present(alertController, animated: true, completion: {
    })
}

this is the result, on dx the alert for manual authorization, on left the picker controller

If you don’t see the preview photos, try to run app with another simulator device.