如何使可编码 class 解码没有 key/name 的 json 数组?

How to make codable class to decode json array which doesn't have a key/name?

我正在尝试解码 JSON 到我的可编码对象。

[
        {
            "Action": "CREDIT",
            "Status": 1,
            "TransactionDate": "2019-09-20T04:23:19.530137Z",
            "Description": "test"
        },
        {
            "Action": "CREDIT",
            "Status": 1,
            "TransactionDate": "2019-09-20T04:23:19.530137Z",
            "Description": "test"
        },
        {
            "Action": "CREDIT",
            "Status": 1,
            "TransactionDate": "2019-09-20T04:23:19.530137Z",
            "Description": "test"
        }
]

我的代码 类 就像..

struct UserWalletHistoryList: Codable {
    var historyList: [UserWalletHistory]
}


struct UserWalletHistory: Codable{
    var Action: String?
    var Status: Int?
    var TransactionDate: String?
    var Description: String?
}

但是没有成功。我认为这是因为变量名 historyList 因为 JSON 中没有 historyList 这样的键。那么……,它应该是什么?

删除UserWalletHistoryList

struct UserWalletHistoryList: Codable {
   var historyList: [UserWalletHistory]
}

并解码 UserWalletHistory

的数组
JSONDecoder().decode([UserWalletHistory].self, from: data)

并且由于 JSON 提供所有字典中的所有键,将结构成员声明为非可选的,并添加 CodingKeys 以将大写键映射到小写成员名称

struct UserWalletHistory : Codable {
    let action: String
    let status: Int
    let transactionDate: String
    let description: String

    private enum CodingKeys : String, CodingKey { 
        case action = "Action"
        case status = "Status"
        case transactionDate = "TransactionDate"
        case description = "Description" 
    }
}