可解码jsondecoder处理相同值的不同编码键

例如,您必须编写一个自定义初始值设定项来处理这些情况

struct Thing : Decodable {
    let scanCode, name, scanId : String

    private enum CodingKeys: String, CodingKey { case scanCode = "ScanCode", name = "Name", ScanID, Id }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        scanCode = try container.decode(String.self, forKey: .scanCode)
        name = try container.decode(String.self, forKey: .name)
        if let id = try container.decodeIfPresent(String.self, forKey: .Id) {
            scanId = id
        } else {
            scanId = try container.decode(String.self, forKey: .ScanID)
        }
    }
}

如果一个密钥解码失败,请先尝试解码另一个密钥。

为了方便我跳过了 attributes 钥匙