Alamofire5为最新版本，是Swift语言开发的网络请求库，功能非常强大，支持链式语法，很优雅。
本文主要介绍了设置请求超时时间的两种方法：
相关参考资料：Alamofire 5 的使用 - 基本用法 Alamofire官网

AF.request(strUrl,
                   method: .get,
                   parameters: paras,
                   headers: nh,
                   requestModifier: { $0.timeoutInterval = UrlSetting.K_APP_REQUEST_TIME_OUT })
            .validate()
            .validate(contentType: UrlSetting.K_APP_ACCEPTABLE_CONTENTTYPES)
            .responseJSON { response in
   
                var msg:String? = response.error?.localizedDescription ?? ""
                print("请求结果：\(response)")
                if response.error != nil {
                    print(msg)
                }
                else{
                  print("请求成功")
                }
            }

var request = URLRequest.init(url: URL.init(string: strUrl.urlEncoded())!)
        request.httpBody = body
        request.httpMethod = "PUT"
        request.timeoutInterval = UrlSetting.K_APP_REQUEST_TIME_OUT
        request.setValue("application/json", forHTTPHeaderField: "Accept")
        request.setValue("application/json;charset=UTF-8", forHTTPHeaderField: "Content-Type")
        
        if  let userLoginToken: String = UserDefaults.standard.value(forKey: Key.userLoginToken) as? String {
            request.setValue(userLoginToken, forHTTPHeaderField: UrlSetting.K_USER_TOKEN)
        }
        
        AF.request(request)
            .validate()
            .validate(contentType: UrlSetting.K_APP_ACCEPTABLE_CONTENTTYPES)
            .responseJSON { response in
           
                var msg:String? = response.error?.localizedDescription ?? ""
                print("请求结果：\(response)")
                if response.error != nil {
                    print(msg)
                }
                else{
                    print("请求成功")
                }
            }

本文结束，不足之处多指正，谢谢