Swift 3 Camera Won't Save

Question

I am trying to work on a custom camera. It is in it's infancy. i have used a couple of tutorials online but since recent changes the code is out of date. I have done my best to adjust it. However i have hit the following wall. When i am in the app, i can take the photo and view the photo library, however when i take the photo and select it, it does not appear, so when i hit the save button the app crashes out and the console reports a nil while unwrapping an optional value.

Any help on correcting this issue and getting the image to display in the UI for saving would be greatly appreciated. Here is the code:

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationBarDelegate {
    let imagePicker = UIImagePickerController()
    @IBOutlet weak var pickedImage: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        imagePicker.delegate = self as? UIImagePickerControllerDelegate & UINavigationControllerDelegate
    }

    @IBAction func camerabuttonaction(_ sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self as? UIImagePickerControllerDelegate & UINavigationControllerDelegate
            imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
            imagePicker.allowsEditing = false
            self.present(imagePicker, animated: true, completion: nil)
        }
    }

    @IBAction func photolibraryaction(_ sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self as? UIImagePickerControllerDelegate & UINavigationControllerDelegate
            imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
            imagePicker.allowsEditing = true
            self.present(imagePicker, animated: true, completion: nil)
        }
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]){
        var chosenImage = UIImage()
        chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        pickedImage.contentMode = .scaleAspectFit
        pickedImage.image = chosenImage
        dismiss(animated:true, completion: nil)
    }

    func saveNotice(){
        let alertController = UIAlertController(title: "Image Saved!", message: "Your picture was successfully saved.", preferredStyle: .alert)
        let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alertController.addAction(defaultAction)
        present(alertController, animated: true, completion: nil)
    }

    @IBAction func saveaction(_ sender: UIButton) {
        let imageData = UIImageJPEGRepresentation(pickedImage.image!, 0.6)
        let compressedJPEGImage = UIImage(data: imageData!)
        UIImageWriteToSavedPhotosAlbum(compressedJPEGImage!, nil, nil, nil)
        saveNotice()
    }
}

Answer 1

And reConnect the IBAction in storyboard to avoid any crash

Please Replace your code with below Code Saving and displaying image Working

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    var imagePicker = UIImagePickerController()
    @IBOutlet weak var pickedImage: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        imagePicker.delegate = self
    }

    @IBAction func camerabuttonaction(_ sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
             imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
            imagePicker.allowsEditing = false
            self.present(imagePicker, animated: true, completion: nil)
        }
    }

    @IBAction func photolibraryaction(_ sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){
             imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
            imagePicker.allowsEditing = true
            self.present(imagePicker, animated: true, completion: nil)
        }
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]){
        var chosenImage = UIImage()
        chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        pickedImage.contentMode = .scaleAspectFit
        pickedImage.image = chosenImage
        dismiss(animated:true, completion: nil)
    }

    func saveNotice(){
        let alertController = UIAlertController(title: "Image Saved!", message: "Your picture was successfully saved.", preferredStyle: .alert)
        let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alertController.addAction(defaultAction)
        present(alertController, animated: true, completion: nil)
    }

    @IBAction func saveaction(_ sender: UIButton) {
        let imageData = UIImageJPEGRepresentation(pickedImage.image!, 0.6)
        let compressedJPEGImage = UIImage(data: imageData!)
        UIImageWriteToSavedPhotosAlbum(compressedJPEGImage!, nil, nil, nil)
        saveNotice()
    }
}