How can I ensure that the photo picked by imagePickerController and camera goes into DetailViewController UIImage?

Question

Image user picks in UIImagePickerController and camera both not working. Where is the [assert] bug coming from?

Here is my Code :

ViewController :

import UIKit

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
    @IBOutlet var takePicture: UIButton!
    @IBOutlet var editPhoto: UIButton!
    
    var pictures = [String]()
    
    @IBAction func takePicture(_ sender: UIButton) {
        camera()
        if let vb = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController {
            navigationController?.pushViewController(vb, animated: true)
    }
        presentingViewController?.dismiss(animated: true, completion: actionClose)
    }
    
    @IBAction func editPhoto(_ sender: UIButton) {
        photoGallery()
        if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController {
            navigationController?.pushViewController(vc, animated: true)
            self.dismiss(animated: true)
    }
        presentingViewController?.dismiss(animated: true, completion: nil)
    }
    
    func camera() {
        let vc = UIImagePickerController()
        vc.sourceType = .camera
        vc.allowsEditing = true
        vc.delegate = self
        present(vc, animated: true)
        actionClose()
    }
    
    @objc func photoGallery() {
        let picker = UIImagePickerController()
        picker.allowsEditing = true
        picker.delegate = self
        present(picker, animated: true)
        actionClose()
    }

    @objc func actionClose() {
       presentingViewController?.dismiss(animated: true)
     }
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        
    }


}

DetailViewController :

import UIKit
import CoreImage

class DetailViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet var imageView: UIImageView!
    @IBOutlet var slider1: UISlider!
    @IBOutlet var slider2: UISlider!
    @IBOutlet var slider3: UISlider!
    @IBOutlet var slider4: UISlider!
    var currentImage: UIImage!
    
    var context: CIContext!
    var currentFilter: CIFilter!
    
    var selectedImage: String?
    override func viewDidLoad() {
        super.viewDidLoad()
        title = "Photo Editor"
        
        context = CIContext()
        currentFilter = CIFilter(name: "CISepiaTone")
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        guard let image = info[.editedImage] as? UIImage else { return }
        dismiss(animated: true)
        print("No image found")
        currentImage = image
        
        let beginImage = CIImage(image: currentImage)
        currentFilter.setValue(beginImage, forKey:kCIInputImageKey)
        
        applyProcessing()
    }
    
    func applyProcessing() {
        let inputKeys = currentFilter.inputKeys
        
        if let cgimg = context.createCGImage(currentFilter.outputImage!, from: currentFilter.outputImage!.extent) {
            let processedImage = UIImage(cgImage: cgimg)
            self.imageView.image = processedImage
        }
    }
}

Thank you, hoping you can help.

Answer 1

the error part is

here you present camera and push to DetailViewController at the same time change your code to this

 @IBAction func takePicture(_ sender: UIButton) {
        camera() //do this only
  }


    @IBAction func editPhoto(_ sender: UIButton) {
      //remove open photo gallery
        if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController {
        navigationController?.pushViewController(vc, animated: true)
        self.dismiss(animated: true)
       }
      presentingViewController?.dismiss(animated: true, completion: nil)
    }