iOS 开发之路（登陆验证调用WebService）二

　　　　swift3.0下使用Alamofire调用Webservice遇到的一些问题以及解决方案。

　　　　首先是针对没有证书的https下的接口处理问题（ps:不推荐在正式版本中使用），manager.request替换掉了Alamofire.request。

let manager = Alamofire.SessionManager.default
        manager.delegate.sessionDidReceiveChallenge = { session, challenge in
            var disposition: URLSession.AuthChallengeDisposition = .performDefaultHandling
            var credential: URLCredential?
            
            if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
                disposition = URLSession.AuthChallengeDisposition.useCredential
                credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
            } else {
                    if challenge.previousFailureCount > 0 {
                        disposition = .cancelAuthenticationChallenge
                    } else {
                        credential = manager.session.configuration.urlCredentialStorage?.defaultCredential(for: challenge.protectionSpace)
                        if credential != nil {
                        disposition = .useCredential
                    }
                }
            }
            
            return (disposition, credential)
        }

　　　　针对soap协议，使用mutableURLRequest来进行请求。

        mutableURLRequest.setValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
        mutableURLRequest.setValue(action, forHTTPHeaderField: "SOAPAction")
        mutableURLRequest.setValue(String(soapMsg.characters.count), forHTTPHeaderField: "Content-Length")
        mutableURLRequest.httpMethod = "POST"
        mutableURLRequest.httpBody = soapMsg.data(using: String.Encoding.utf8)

　　　　得到返回的值包含来xml命名空间和其中的有效结果。通过第三方库SWXMLHash来进行XML的解析，再针对解析得到的Json字符串利用JSONSerialization获得相应的字典。　

        manager.request(mutableURLRequest as URLRequest).responseData{ response in
            //debugPrint(response)
            let xml = SWXMLHash.parse(response.data!)
            let a: String = (xml["soap:Envelope"]["soap:Body"]["FindUserNewResponse"]["FindUserNewResult"].element?.text)!
            print(a)
            if !a.isEmpty && a != "err:账号或密码有误！"{
                let data = a.data(using: String.Encoding.utf8)! as Data
                let a_dic = try? JSONSerialization.jsonObject(with: data as Data, options: JSONSerialization.ReadingOptions.mutableContainers)
                if let dict = a_dic as? Dictionary<String, String> {
                    print(dict["姓名"]!)
                    print(dict["地区"]!)
                    callback?(true)
                }
            }else{
                callback?(false)

            }
        }

　　　　注意上面使用了一个回调函数，这是因为Alamofire调用WebService是异步的方式，这里通过isOk来判定登陆是否成功。

 func reqWebService(values: Dictionary<String, String>, callback: ((_ isOk: Bool)->Void)?){}