swift - Swift4:使用userDefaults保存UIImages

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Saving an image array with UserDefaults
                                
                                    （2个答案）
                                
                        
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因此，我在ViewController中放置了一个与屏幕一样大的图像视图，并且由于有了imageButton，我可以将其设置为背景。现在，每次我使用该应用程序时，图像都不会出现。有什么方法可以使用userDefaults保存它吗？

 @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)
    }
}

最佳答案

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)
    }
}

读入 viewDidLoad

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

关于swift - Swift4:使用userDefaults保存UIImages ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55239306/

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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)
    }
}

读入 viewDidLoad

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