Add a dynamic variable to struct [duplicate] - ios

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Have a variable with multiple types in Swift
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Closed 14 days ago.
I have a 2 structs like so:
struct StructA: Codable {
let title: String?
let subtitle: String?
let myImage: URL?
}
struct StructB: Codable {
let title: String?
let subtitle: String?
let myImage: UIImage?
}
Now, in StructA, the variable myImage is of type URL? and in StructB the variable myImage is of type UIImage?. I want the variable myImage to be able to have either URL? or UIImage? as the type so that I can have a single struct instead of two. Can someone help?
I tried to use Generics on the struct so that I can assign structs of different type to the same variable..but couldn't achieve that.

Answer 1

If you want a single instance to be able to contain either a URL or a UIImage, you need to use an enum
struct StructAorB: Codable {
enum ImageKind: Codable
{
case url(URL)
case image(UIImage) // NB UIImage is not Codable, but this is irrelevant to the question
// You'll just need to extend it to conform
case none
}
let title: String?
let subtitle: String?
let myImage: ImageKind
}
If you find it inconvenient to have switches everywhere, create convenience properties
extension StructAorB
{
var imageAsUrl: URL?
{
switch myImage
{
case .url(let ret):
return ret
default:
return nil
}
}
}