ios - 为什么从库中获取照片时 imagePickerController 会崩溃，但从相机中获取照片却可以正常工作

Question

每次从图库中获取照片时，ImagePickerController 都会崩溃，并且会显示如下警告。

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType encodeWithCoder:]: unrecognized selector sent to instance 0x6000033a8280'

我正在使用 UIImagePickerController 但是当我从相机获取照片时它工作正常。

我已将此代码放入 info.list

<key>NSCameraUsageDescription</key>
<string>This app wants to take pictures.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app wants to use your photos.</string>

这是我的 View Controller 中的所有代码 我想使用 ImagePickerController 从库中获取照片，但不知道为什么会崩溃。

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var shopIDNumber: UILabel!
    @IBOutlet weak var bgAddImage: UIView!
    @IBOutlet weak var doneButton: UIButton!
    @IBOutlet weak var confirmImage: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        tapOnImage()

        shopIDNumber.layer.cornerRadius = 8
        bgAddImage.layer.cornerRadius = 8
        doneButton.layer.cornerRadius = 25

    }

    @objc func tapToImageView(sender: UITapGestureRecognizer) {
        let pickerController = UIImagePickerController()
        pickerController.delegate = self
        pickerController.allowsEditing = true

        let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
        actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (action) in
            if UIImagePickerController.isSourceTypeAvailable(.camera) {
                pickerController.sourceType = .camera
                self.present(pickerController, animated: true, completion: nil)
            }else{
                let alert = UIAlertController(title: "Mistake", message: "Camera Not Work", preferredStyle: .alert)
                let okAction = UIAlertAction(title: "Okey", style: .default) { (action) in
                }
                alert.addAction(okAction)
                self.present(alert, animated: true, completion: nil)
            }
        }))
        actionSheet.addAction(UIAlertAction(title: "Library", style: .default, handler: { (action) in
            pickerController.sourceType = .photoLibrary
            self.present(pickerController, animated: true, completion: nil)
        }))

        actionSheet.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))
        self.present(actionSheet, animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

        var selectedImageFromPicker: UIImage?

        if let editedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
            selectedImageFromPicker = editedImage

        }else if let originalImage:UIImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
            selectedImageFromPicker = originalImage
        }

        if let selectedImage = selectedImageFromPicker {
            confirmImage.image = selectedImage
        }
        self.doneButton.backgroundColor = UIColor(red: 0.0, green: 182.0 / 255.0, blue: 79.0 / 255.0, alpha: 1.0)
        picker.dismiss(animated: true, completion: nil)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }

    func tapOnImage() {
        let tapGestureToImageView = UITapGestureRecognizer(target: self, action: #selector(tapToImageView(sender:)))
        tapGestureToImageView.numberOfTapsRequired = 1
        confirmImage?.isUserInteractionEnabled = true
        confirmImage.addGestureRecognizer(tapGestureToImageView)
    }
}

Answer 1

您的代码看起来不错。最有可能的问题是以下。

    @IBOutlet weak var confirmImage: UIImageView!

检查您的 Interface Builder 是否已正确连接到此 socket 。看起来它已损坏或连接到不正确的类型。

您可以通过注释掉以下行来验证问题是否存在:

confirmImage.image = selectedImage

当您在上面注释掉如果应用程序没有崩溃时，我最初的假设是正确的。