假设我必须将此数据发送到服务器:
struct Event: Codable {
let title: String
let params: [String:Any]? //Not allowed
}
因此，例如，这些事件可能看起来像以下任何一个:
let event = Event(title: "cat was pet", params:["age": 7.2])
let event = Event(title: "cat purred", params:["time": 9])
let event = Event(title: "cat drank", params:["water": "salty", "amount": 3.3])
我需要能够将任意数量的键/值对作为params发送到事件.Codable能做到这一点吗？如果不是，我将如何将params编码为json字符串？
如果所有类型都符合Codable,Codable就是神奇的，但在您的情况下，我建议使用传统的JSONSerialization.添加计算(computed)属性dictionaryRepresentation
struct Event: {
let title: String
let params: [String:Any]
var dictionaryRepresentation: [String:Any] {
return ["title":title,"params":params]
}
}
然后对事件进行编码
let data = try JSONSerialization.data(withJSONObject: event.dictionaryRepresentation)
这比强迫Any变成Codable要便宜/麻烦(无意冒犯，Rob).