Swift4：用userDefaults保存UIImages [重复]

Question

这个问题在这里已有答案：

• Saving an image array with UserDefaults 2回答

免责声明：我发现的任何东西都太旧或者根本不需要工作。

因此，我在ViewController中放入了与屏幕一样大的图像视图，并且由于imageButton，我可以将其设置为背景。现在，每次我使用应用程序时，图像都不会出现。有没有办法用userDefaults保存它？

 @IBOutlet weak var imageView: UIImageView!
    var imagePicker = UIImagePickerController()

@IBAction func imageButton(_ sender: UIButton) {
        imagePicker.sourceType = .photoLibrary
        imagePicker.allowsEditing = true
        present(imagePicker, animated: true, completion: nil)

    }

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
            imageView.image = image
        }
        dismiss(animated: true, completion: nil)
    }
}

Answer 1

你可以试试

保存

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
            imageView.image = image
            if let data = image.pngData() {
               UserDefaults.standard.set(data, forKey: "YourKey")
            }
        }
        dismiss(animated: true, completion: nil)
    }
}

阅读viewDidLoad内部

if let data = UserDefaults.standard.data(forKey: "YourKey") { 
    let image = UIImage(data: data)
}