UIImagePicker init takes too long - ios

Question

I have an imagePicker, and when I initialize it, it takes pretty long time, it gets the screen to lag, for example, I have a screen where a user can write information and chose a picture, when I click on a button to move to that screen, it lags a bit before actually moving to that screen.
I ran the Time Profiler, and the problem with the screen seems to be the initialization of the imagePicker.
This is the imagePicker class:
import UIKit
public protocol ImagePickerDelegate: class {
func didSelect(image: UIImage?)
}
class ImagePicker: NSObject {
private let pickerController: UIImagePickerController
private weak var presentationController: UIViewController?
private weak var delegate: ImagePickerDelegate?
init(presentationController: UIViewController, delegate: ImagePickerDelegate){
self.pickerController = UIImagePickerController()
super.init()
self.presentationController = presentationController
self.delegate = delegate
self.pickerController.delegate = self
self.pickerController.allowsEditing = true
self.pickerController.mediaTypes = ["public.image"]
}
private func action(for type: UIImagePickerController.SourceType, title: String) -> UIAlertAction?{
guard UIImagePickerController.isSourceTypeAvailable(type) else { return nil}
return UIAlertAction(title: title, style: .default, handler: { [unowned self] _ in
self.pickerController.sourceType = type
self.presentationController?.present(self.pickerController, animated: true)
})
}
func present(from sourceView: UIView){
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
if let action = self.action(for: .camera, title: ImagePickerStrings.takePicture){
alertController.addAction(action)
}
if let action = self.action(for: .savedPhotosAlbum, title: ImagePickerStrings.cameraRoll) {
alertController.addAction(action)
}
alertController.addAction(UIAlertAction(title: GeneralStrings.cancel, style: .cancel, handler: nil))
self.presentationController?.present(alertController, animated: true)
}
private func pickerController(_ controller: UIImagePickerController, didSelect image: UIImage?){
controller.dismiss(animated: true, completion: nil)
self.delegate?.didSelect(image: image)
}
}
extension ImagePicker: UIImagePickerControllerDelegate{
public func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
self.pickerController(picker, didSelect: nil)
}
public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
guard let image = info[.editedImage] as? UIImage else {
return self.pickerController(picker, didSelect: nil)
}
self.pickerController(picker, didSelect: image)
}
}
And this is how I initialize it:
I have this variable inside the class:
var imagePicker: ImagePicker!
This is in the viewDidLoad:
override func viewDidLoad() {
super.viewDidLoad()
imagePicker = ImagePicker(presentationController: self, delegate: self)
}

Answer 1

It's usually very slow on simulator and overall in debug mode.
See UIImagePickerController really slow when calling alloc init