1:定义一个网络工具类，如HttpTools,NetworkTools等等

在NetworkTools.swift类中：

这里采用单例封装：

import AFNetworking// 枚举方式1enum RequestType {    case GET    case POST}// 枚举方式2enum RequestType1 : Int {    case GET = 0    case POST = 1}// 枚举方式3enum RequestType2 : String {    case GET = "GET"    case POST = "POST"}class NetworkTools: AFHTTPSessionManager {    /// let是线程安全的    static let shareInstance : NetworkTools = {       let tools = NetworkTools()        tools.responseSerializer.acceptableContentTypes?.insert("text/html")        return tools    }()}// MARK: - 封装请求方法extension NetworkTools {    func request(methodType : RequestType, urlString : String, parameters : [String : AnyObject], finished:(result : AnyObject?,error : NSError?) -> ()) {                // 定义成功的回调闭包:使用一个常量来接收它        let successCallBack = { (task : NSURLSessionDataTask, result : AnyObject?) in            finished(result: result, error: nil)        }                        // 定义一个失败的回调闭包:使用一个常量来接收它        let failureCallBack = { (task : NSURLSessionDataTask?, error : NSError) in            finished(result: nil, error: error)        }            // 发送网络请求        if methodType == .GET {            GET(urlString, parameters: parameters, progress: nil, success: successCallBack, failure: failureCallBack)        }else {            POST(urlString, parameters: parameters, progress: nil, success: successCallBack, failure: failureCallBack)        }    }}

2:在viewController.swift中调用网络请求接口

class ViewController: UIViewController {    override func viewDidLoad() {        super.viewDidLoad()        //print(NetworkTools.shareInstance)        //print(NetworkTools.shareInstance)    }        override func touchesBegan(touches: Set
    
     , withEvent event: UIEvent?) {        /// 外面请求接口回调        NetworkTools.shareInstance.request(.POST, urlString: "http://httpbin.org/post", parameters: ["name" : "lishengbing","age" : 106]) { (result, error) in            if error != nil {                print(error)                return            }                        print(result)        }    }    }
    

知识点:

1:swift中创建单例：

class NetworkTools: AFHTTPSessionManager {    /// let是线程安全的    static let shareInstance : NetworkTools = {       let tools = NetworkTools()        return tools    }()}

2:swift中枚举的定义:

// 枚举方式1enum RequestType {    case GET    case POST}// 枚举方式2enum RequestType1 : Int {    case GET = 0    case POST = 1}// 枚举方式3enum RequestType2 : String {    case GET = "GET"    case POST = "POST"}

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