Question

我正在尝试使用自定义相机。它处于婴儿期。我已经在线使用了几个教程，但由于最近的更改，代码已经过时了。我尽力调整它。但是我已经碰到了下面的墙。当我在应用程序中时，我可以拍摄照片并查看照片库，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，应用程序崩溃并且控制台报告为零同时解开一个可选值。

有关纠正此问题并让图像显示在用户界面中以保存的任何帮助都将非常感激。这是代码：

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

并在故事板中重新连接IBAction以避免任何崩溃

请使用以下代码保存并显示图像工作

替换您的代码

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()
    }
}

Swift 3相机不会保存

1 个答案: