Swift 3相机无法保存

Question

我正在试着用一台定制的相机。它还处于初级阶段。我在网上使用了几个教程，但由于最近的更改，代码已经过时了。我已经尽了最大努力去调整它。然而，我遇到了下面的问题。当我在应用程序中时，我可以拍摄照片并查看图片库，但是当我拍摄照片并选择它时，它不会出现，所以当我点击保存按钮时，应用程序崩溃，控制台在展开可选值时报告为零。

任何有关纠正此问题并将图像显示在UI中以进行保存的帮助都将不胜感激。代码如下：

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

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并在故事板中reConnect IBAction以避免任何崩溃

请将您的代码替换为以下代码保存和显示图像工作

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()
    }
}