在 Swift 中解码类别数组的正确方法是什么

Question

For example, I have

[{
    "name": "Afghanistan",
    "numericCode": "004",
    "altSpellings": ["AF", "Afġānistān"],
    "currencies": [{
        "code": "AFN",
        "name": "Afghan afghani",
        "symbol": "؋"
    }]
},
...

To get the "altSpellings" and "currencies", how would I build my Model?

struct WorldData: Identifiable, Decodable {
    var id: String {
        return numericCode
    }
    var name: String
    var numericCode : String
    var altSpellings : Array
    var currencies : ???
}

and, if my API object doesn't have an ID, would it be like:

var id: ObjectIdentifier

Thank you!

Answer 1

Create another struct Currency for currencies and for altSpellings it's just [String] .

struct WorldData: Identifiable, Decodable {
    let name, numericCode: String
    let altSpellings: [String]
    let currencies: [Currency]

    var id: String {
        return numericCode
    }
}

struct Currency: Decodable {
    let code, name, symbol: String
}

Then decode using [WorldData] .

do {
    let decodedWorldData = try JSONDecoder().decode([WorldData].self, from: data)
    print(decodedWorldData)
} catch {
    print(error)
}