如果未定义键，如何使用Codable结构表示JSON？

Question

我想将以下JSON表示为符合Codable的结构：

{
    "trooper": {"name": "Trooper", "type": "alsatian"},
    "spot": {"name": "Spot", "type": "labrador"},
    "sniffles": {"name": "Sniffles", "type": "poodle"}
}

列表并不详尽，即列表中可以有任意数量的狗。

{"name": "Sniffles", "type": "poodle"}部分很简单，可以这样完成：

struct Dog: Codable {
    var name: String
    var type: String
}

那根级别呢？

Answer 1

这就是我想要的：

let str = """
{
    "trooper": {"name": "Trooper", "type": "alsatian"},
    "spot": {"name": "Spot", "type": "labrador"},
    "sniffles": {"name": "Sniffles", "type": "poodle"}
}
"""

struct Dog: Codable {
    var name: String
    var type: String
}

if let data = str.data(using: .utf8) {

    do {
        let decoder = JSONDecoder()
        let dogs = try decoder.decode([String: Dog].self, from: data)
        print(dogs)
    } catch {
        print(error)
    }

}