I am using the following struct that conforms to Codable to represent my data within a Set, I then take this set encode it into a JSON Array that looks like the following [{"myexample":"Example5","id":3}]

Struct and Encoding:

struct Model : Codable, Hashable {
    var myexample: String?
    var id: Int?
}

var mySet: Set<Model> = []
mySet.insert(Model(myexample: "Example4", id: 3))

do {
    let json = try JSONEncoder().encode(mySet)
    print(String(data: json, encoding: .utf8)!)
} catch {
    print(error)
}

How can I inversely decode this array using the following function?

Currently getting this error:

Value of type 'Set' has no member 'utf8'

func processArray(array:Set<Model> = []) {
    do{
        let mydata = Data(array.utf8.data)
        let decoded = try  JSONDecoder().decode([Model].self,from: mydata)
        print(decoded)
    }catch let jsonErr {
        print(jsonErr)
    }
}

CodePudding user response：

JSON is a string format so a JSON array is also string

func processJSON(_ json: String) {
    do{
        let mydata = Data(json.utf8)
        let decoded = try JSONDecoder().decode(Set<Model>.self,from: mydata)
        print(decoded)
    } catch {
        print(error)
    }
}