ios - 在 ios 中从不同的 View Controller (不同时间)多次调用相同的 Web 服务

Question

我只是想知道从不同的 View Controller (在不同的时间)调用相同的 Web 服务的最佳方式是什么。我应该遵循什么样的架构或设计？我不想在每个 View Controller 中编写相同的代码。

Answer 1

如果使用 Alamofire 库，我建议使用

class NetworkManager {
static let shared = NetworkManager()

static let alamofireManager: SessionManager = {
    let sessionConfiguration = URLSessionConfiguration.default
    sessionConfiguration.timeoutIntervalForRequest = TimeInterval(_TIMEOUT)
    sessionConfiguration.timeoutIntervalForResource = TimeInterval(_TIMEOUT)
    return Alamofire.SessionManager(configuration: sessionConfiguration)
}()

func performRequest(url: String,
                    method: HTTPMethod = .get,
                    parameters: [String: Any] = [String: Any](),
                    encoding: ParameterEncoding = URLEncoding.default,
                    contentType: String? = nil,
                    headers: HTTPHeaders = [String: String](),
                    success: @escaping(Data, Int) -> (),
                    failure: @escaping(CustomError) -> ()) {

        debugPrint("NetworkManager is calling endpoint: \(url)")
        NetworkManager.alamofireManager.request(url, method: method, parameters: parameters, encoding: encoding, headers: headers).validate().response { response in
            guard let status = response.response?.statusCode, let data = response.data else {
                if let error = response.error {
                    debugPrint("Error when calling endpoint \(url)")
                    failure(.unknownError(message: error.localizedDescription))
                }
                return
            }
            debugPrint("HTTP Status received: \(status)")
            success(data, status)
       }
    } else {
        failure(.noNetworkConnection)
    }
}

请随时使用您的自定义错误或您喜欢的任何内容修改failure 处理程序。当然，您需要序列化响应。