Properly the easiest way is to just make the property Data instead of UIImage like this: public struct SomeImage: Codable { public let photo: Data public init(photo: UIImage) { self.photo = photo.pngData()! } } Deserialize the image: UIImage(data: instanceOfSomeImage.photo)!
Switch from use of UIGraphicsBeginImageContext to UIGraphicsBeginImageContextWithOptions (as documented on this page). Pass 0.0 for scale (the third argument) and you’ll get a context with a scale factor equal to that of the screen. UIGraphicsBeginImageContext uses a fixed scale factor of 1.0, so you’re actually getting exactly the same image on an iPhone 4 as … Read more