首先用桥接或pods将AFNetworking导入项目,在这不再赘述,然后创建一个单例NetWorkTools.swift

继承:AFHTTPSessionManager

import UIKit

import AFNetworking

//枚举定义请求方式

enum HTTPRequestType {

    case GET

    case POST

}

class NetworkManager: AFHTTPSessionManager {

    //单例

    static let shared = NetworkManager()

    /// 封装GET和POST 请求

    ///

    /// - Parameters:

    ///   - requestType: 请求方式

    ///   - urlString: urlString

    ///   - parameters: 字典參数

    ///   - completion: 回调

    func request(requestType: HTTPRequestType, urlString: String, parameters: [String: AnyObject]?, completion: @escaping (AnyObject?) -> ()) {

        //成功回调

        let success = { (task: URLSessionDataTask, json: Any)->() in

            completion(json as AnyObject?)

        }

        //失败回调

        let failure = { (task: URLSessionDataTask?, error: Error) -> () in

            print("网络请求错误 \(error)")

            completion(nil)

        }

        if requestType == .GET {

            get(urlString, parameters: parameters, progress: nil, success: success, failure: failure)

        } else {

            post(urlString, parameters: parameters, progress: nil, success: success, failure: failure)

        }

    }

}

调用的地方

NetworkManager.shared.request(requestType: .GET, urlString: "https:www.baidu.com", parameters: ["userName": "zhangsan" as AnyObject]) { (json) in

    print(json)

}