使用 UserDefaults 保存图像数组

我有一个应用程序，用户可以在其中拍照，拍照后应将其保存到UserDefaults。我不断收到此错误：

"cannot invoke 'setObject' with an argument list of type '(UIImage. type, forKey:[UIImage])'"

我已经搜索过这里的文档和帖子，但没有任何帮助。 这是我的代码。

let defaults = NSUserDefaults.standardUserDefaults()

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

    picker.dismissViewControllerAnimated(true, completion: nil)

    switch currentClothesSelection!{

        case "1":
            shirts.append(info[UIImagePickerControllerOriginalImage] as! UIImage)

            //this is where the error occurs
            defaults.setObject(UIImage.self, forKey: array1)

        case "2" :
            pants.append(info[UIImagePickerControllerOriginalImage] as! UIImage)
        case "3" :
            shorts.append(info[UIImagePickerControllerOriginalImage] as! UIImage)
        case "4" :
            jackets.append(info[UIImagePickerControllerOriginalImage] as! UIImage)
        case "5" :
            shoes.append(info[UIImagePickerControllerOriginalImage] as! UIImage)

        default:
         break
    }

编辑/更新：

Xcode 10.1 • Swift 4.2.1 或更高版本

将图像存储在 NSUserDefaults 中并不是一个好主意，但如果您确实想要这样做，则需要将其存储为 NSData。

value参数只能是属性列表对象：NSData， NSString、NSNumber、NSDate、NSArray 或 NSDictionary。对于 NSArray 和 NSDictionary 对象，它们的内容必须是属性列表对象

我建议将其保存到本地磁盘的文档文件夹中。如果您确实想将其保存到 NSUserDefaults，我建议仅使用小图像，并自行承担风险:) 您可以执行以下操作：

extension UserDefaults {
    func set(image: UIImage?, quality: CGFloat = 0.5, forKey defaultName: String) {
        guard let image = image else {
            set(nil, forKey: defaultName)
            return
        }
        set(image.jpegData(compressionQuality: quality), forKey: defaultName)
    }
    func image(forKey defaultName:String) -> UIImage? {
        guard
            let data = data(forKey: defaultName),
            let image = UIImage(data: data)
        else  { return nil }
        return image
    }
    func set(images value: [UIImage]?, forKey defaultName: String) throws {
        guard let value = value else {
            removeObject(forKey: defaultName)
            return
        }
        try set(NSKeyedArchiver.archivedData(withRootObject: value, requiringSecureCoding: false), forKey: defaultName)
    }
    func images(forKey defaultName: String) throws -> [UIImage] {
        guard let data = data(forKey: defaultName) else { return [] }

        let object = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data)
        return object as? [UIImage] ?? []
    }
}

测试：

let image = UIImage(data: try! Data(contentsOf: URL(string: "https://i.stack.imgur.com/Xs4RX.jpg")!))!
UserDefaults.standard.set(image: image, forKey: "imageKey")
if let loadedImage = UserDefaults.standard.image(forKey: "imageKey") {
    print(loadedImage.size)  // "(719.0, 808.0)"
}

let images = [image, image]
try? UserDefaults.standard.set(images: images, forKey: "imagesKey")
if let loadedImages = try? UserDefaults.standard.images(forKey: "imagesKey") {
    print(loadedImages.count)  // 2
}