如何使用Alamofire 4 SessionManager？

Question

我在Swift 2.3中使用Alamofire 3.4并且我需要将我的代码更新为Swift 3和Alamofire 4.我正在使用Alamofire的Manager在URL中进行POST.我阅读了有关SessionManager的文档,我理解请求使用方法.GET.

我正在使用Manager .Response()来获取请求的回调,现在在SessionManager中已经更改了.

如何使用SessionManager创建POST方法？我如何从请求中获得响应？

这是我的原始代码:

import UIKit
import AEXML
import Alamofire

class Request: NSObject {

    internal typealias RequestCompletion = (statusCode: Int?, error:NSError?) -> ()
    private var completionBlock: RequestCompletion!

    var serverTrustPolicy: ServerTrustPolicy!
    var serverTrustPolicies: [String: ServerTrustPolicy]!
    var afManager: Manager!

    func buildBdRequest(ip : String, serviceStr : String, completionBlock:RequestCompletion){
       let url = getURL(ip, service: serviceStr)
        configureAlamoFireSSLPinningWithCertificateData()
        makeAlamofireRequest(url)

        self.completionBlock = completionBlock
    }

    func makeAlamofireRequest(url : String){
        self.afManager.request(.POST, url)
            .validate(statusCode: 200..<300)
            .response { request, response, data, error in

                print("data - > \n    \(data.debugDescription) \n")
                print("response - >\n    \(response.debugDescription) \n")
                print("error - > \n    \(error.debugDescription) \n")

                var statusCode = 0

                if response != nil {
                    statusCode = (response?.statusCode)!
                }
                   self.completionBlock(statusCode: statusCode, error: error)
        }

    }


    private func getURL(ip : String, service: String) -> String{
        return ip + service;
    }

    func configureAlamoFireSSLPinningWithCertificateData() {
        self.serverTrustPolicies = [ :
            //            "github.com": self.serverTrustPolicy!
        ]

        self.afManager = Manager(
            configuration: NSURLSessionConfiguration.defaultSessionConfiguration()
        )
    }
}

Answer 1

我已将您的代码迁移到Swift 3和Alamofire 4,这是一个结果:

internal typealias RequestCompletion = (Int?, Error?) -> ()?
private var completionBlock: RequestCompletion!
var afManager : SessionManager!


func makeAlamofireRequest(url :String){
    let configuration = URLSessionConfiguration.default

    afManager = Alamofire.SessionManager(configuration: configuration)
    afManager.request(url, method: .post).validate().responseJSON {
                response in
                switch (response.result) {
                case .success:
                    print("data - > \n    \(response.data?.debugDescription) \n")
                    print("response - >\n    \(response.response?.debugDescription) \n")
                    var statusCode = 0
                    if let unwrappedResponse = response.response {
                        let statusCode = unwrappedResponse.statusCode
                    }
                    self.completionBlock(statusCode, nil)

                    break
                case .failure(let error):
                    print("error - > \n    \(error.localizedDescription) \n")
                    let statusCode = response.response?.statusCode
                    self.completionBlock?(statusCode, error)
                    break
                }
            }
}

关于代码的一些注释:

在Alamofire 4.0中,您无需在代码200..300之间手动验证.validate()方法自动完成.

文件:

自动验证200 ... 299范围内的状态代码,并且响应的Content-Type标头与请求的Accept标头匹配(如果提供了一个).

您可以response在responseJSON方法中使用参数.它包含代码中所需的所有信息.

关于request方法

open func request(_ url: URLConvertible, method: HTTPMethod = .get, parameters: Parameters? = nil, encoding: ParameterEncoding = URLEncoding.default, headers: HTTPHeaders? = nil) -> DataRequest

除URL之外的所有参数最初都是nil或具有默认值.因此,为您的请求添加参数或标题没有问题.

希望它能帮到你