iOS Swift中JSON响应结构体重复定义报错及解析问题求助

你编写的代码中存在同名类型重复定义的问题：在同一作用域下，你为两个JSON响应分别定义了同名的Response和Result结构体，Swift不允许重复声明相同名称的类型，这会直接导致编译报错。

通过给不同响应的结构体添加专属前缀，或者使用嵌套结构体的方式，避免命名冲突。以下是两种可行的修改方案：

方案1：添加专属前缀（推荐，结构清晰） #

为每个响应的Response和Result结构体添加对应前缀，明确区分不同业务的模型：

OTP响应模型 #

// MARK: - OTP响应根结构
struct OTPRes: Codable {
    let response: OTPResponse
}

// MARK: - OTP响应内容
struct OTPResponse: Codable {
    let success: String
    let result: OTPResult
}

// MARK: - OTP结果体
struct OTPResult: Codable {
    let encryptedOtp: String
}

登录响应模型 #

// MARK: - 登录响应根结构
struct LoginRes: Codable {
    let response: LoginResponse
}

// MARK: - 登录响应内容
struct LoginResponse: Codable {
    let success: String
    let result: LoginResult
}

// MARK: - 登录结果体
struct LoginResult: Codable {
    let lastName: String
    let deviceIDS: [DeviceID]
    let loginID: String
    let profileImage: String
    let platform: String
    let doNotDisturb: Bool
    let segment, email: String
    let editAccess, roaming: Bool
    let contactID, mobile, accountclass: String
    let dashboardInfo: DashboardInfo
    let assignedUserID, accountNumber, userName, accessToken: String
    let lastLoginTime, accountID, firstName, servicetype: String
    let pushNotifications: Bool
    let response, success, basePlan, location: String

    enum CodingKeys: String, CodingKey {
        case lastName
        case deviceIDS = "deviceIds"
        case loginID = "loginId"
        case profileImage, platform, doNotDisturb, segment, email, editAccess, roaming
        case contactID = "contactId"
        case mobile, accountclass, dashboardInfo
        case assignedUserID = "assigned_user_id"
        case accountNumber, userName, accessToken, lastLoginTime
        case accountID = "accountId"
        case firstName, servicetype, pushNotifications, response, success, basePlan, location
    }
}

// MARK: - 仪表盘信息
struct DashboardInfo: Codable {
    let noOfServiceAccounts: String
}

// MARK: - 设备ID
struct DeviceID: Codable {
    let accountName, accountNo, deviceID, email: String

    enum CodingKeys: String, CodingKey {
        case accountName, accountNo
        case deviceID = "deviceId"
        case email
    }
}

方案2：嵌套结构体 #

将Response和Result嵌套在根结构体内部，利用Swift的嵌套类型特性避免冲突：

OTP响应模型 #

struct OTPRes: Codable {
    struct Response: Codable {
        let success: String
        struct Result: Codable {
            let encryptedOtp: String
        }
        let result: Result
    }
    let response: Response
}

登录响应模型 #

struct LoginRes: Codable {
    struct Response: Codable {
        let success: String
        struct Result: Codable {
            let lastName: String
            let deviceIDS: [DeviceID]
            let loginID: String
            let profileImage: String
            let platform: String
            let doNotDisturb: Bool
            let segment, email: String
            let editAccess, roaming: Bool
            let contactID, mobile, accountclass: String
            let dashboardInfo: DashboardInfo
            let assignedUserID, accountNumber, userName, accessToken: String
            let lastLoginTime, accountID, firstName, servicetype: String
            let pushNotifications: Bool
            let response, success, basePlan, location: String

            enum CodingKeys: String, CodingKey {
                case lastName
                case deviceIDS = "deviceIds"
                case loginID = "loginId"
                case profileImage, platform, doNotDisturb, segment, email, editAccess, roaming
                case contactID = "contactId"
                case mobile, accountclass, dashboardInfo
                case assignedUserID = "assigned_user_id"
                case accountNumber, userName, accessToken, lastLoginTime
                case accountID = "accountId"
                case firstName, servicetype, pushNotifications, response, success, basePlan, location
            }
        }
        let result: Result
    }
    let response: Response
}

struct DashboardInfo: Codable {
    let noOfServiceAccounts: String
}

struct DeviceID: Codable {
    let accountName, accountNo, deviceID, email: String

    enum CodingKeys: String, CodingKey {
        case accountName, accountNo
        case deviceID = "deviceId"
        case email
    }
}

修改完成后，即可正常解码对应JSON：

解码OTP响应 #

// 假设otpJsonData是从网络请求获取的JSON数据
do {
    let otpResponse = try JSONDecoder().decode(OTPRes.self, from: otpJsonData)
    print("加密OTP：\(otpResponse.response.result.encryptedOtp)")
} catch {
    print("OTP解码失败：\(error.localizedDescription)")
}

解码登录响应 #

// 假设loginJsonData是从网络请求获取的JSON数据
do {
    let loginResponse = try JSONDecoder().decode(LoginRes.self, from: loginJsonData)
    print("用户名：\(loginResponse.response.result.firstName) \(loginResponse.response.result.lastName)")
} catch {
    print("登录响应解码失败：\(error.localizedDescription)")
}

内容的提问来源于stack exchange，提问作者user15660516