Alert not showing in the ImagePicker - swift

Question

I want to offer the option to use either the photo library or the camera, but my alert to select either photos or use a camera doesn't show up when I add the present actionSheet. The compiled application goes straight to photo album without giving me the option to select camera or photo library.
This is the log from my Xcode 11:
2020-06-15 23:05:22.931477-0400 MeMe[6298:3505455] Attempt to present
on which is waiting for a delayed presention of
to complete 2020-06-15
23:05:22.931653-0400 MeMe[6298:3505455] Attempt to present
on
which is waiting for a delayed presention of to complete error in connection_block_invoke_2:
Connection interrupted
This is my code:
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate,
UINavigationControllerDelegate {
// OUTLETS *******************************************
// Image
#IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
}
// ACTIONS *******************************************
// Button
#IBAction func pickImage(_ sender: Any) {
let imagePickerController = UIImagePickerController()
// set imagePickerController as delegate
imagePickerController.delegate = self
// provide actionSheet to display the camera and photo options
let actionSheet = UIAlertController(title: "Source", message: "Take a picture or select a photo", preferredStyle: .actionSheet)
// add camera action to imagePickerController
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler:{(action:UIAlertAction) in
// check if the camera is available
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePickerController.sourceType = .camera
}
else {
print("Camera not available")
}
}))
self.present(imagePickerController, animated: true, completion: nil)
// add photos action to imagePickerController
actionSheet.addAction(UIAlertAction(title: "Photos", style: .default, handler:{(action:UIAlertAction) in imagePickerController.sourceType = .photoLibrary}))
self.present(imagePickerController, animated: true, completion: nil)
// cancel
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}
// assign image to imageView
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
imageView.image = image
picker.dismiss(animated: true, completion: nil)
}
// dismiss the image selector
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
}

Answer 1

You're trying to present the actionSheet after presenting imagePickerController which is not possible. You need to present the imagePickerController in the UIAlertAction's handler block. Here's the code:
#IBAction func pickImage(_ sender: Any) {
let imagePickerController = UIImagePickerController()
// set imagePickerController as delegate
imagePickerController.delegate = self
// provide actionSheet to display the camera and photo options
let actionSheet = UIAlertController(title: "Source", message: "Take a picture or select a photo", preferredStyle: .actionSheet)
// add camera action to imagePickerController
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler:{(action:UIAlertAction) in
// check if the camera is available
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePickerController.sourceType = .camera
}
else {
print("Camera not available")
}
self.present(imagePickerController, animated: true, completion: nil)
}))
// add photos action to imagePickerController
actionSheet.addAction(UIAlertAction(title: "Photos", style: .default, handler:{(action:UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
self.present(imagePickerController, animated: true, completion: nil)
}))
// cancel
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}

Answer 2

#IBAction func pickImage(_ sender: Any) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
let actionSheet = UIAlertController(title: "Source", message: "Take a picture or select a photo", preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler:{(action:UIAlertAction) in
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePickerController.sourceType = .camera
self.present(imagePickerController, animated: true, completion: nil)
} else {
print("Camera not available")
}
}))
actionSheet.addAction(UIAlertAction(title: "Photos", style: .default, handler:{(action:UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
self.present(imagePickerController, animated: true, completion: nil)
}))
// cancel
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}