iOS HTTP请求

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没有容错处理，没有降耦合设计、接口多级封装等等的设计

原生NSURLSession做个http请求很简单啊（swif代码看的真心顺眼多了）

import UIKitimport Foundationclass LLNetwork: NSObject {      func request(method: String, url: String, params: Dictionary<String, AnyObject> = Dictionary<String, AnyObject>(),callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {        //组装URL        var newURL = url        if method == "GET"{            newURL += "?"            newURL +=  self.buildParams(params)        }        //创建URLRequest 存储请求信息        let request = NSMutableURLRequest(URL: NSURL(string: url)!)        request.HTTPMethod = method        if method == "POST"{            request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")            request.HTTPBody = buildParams(params).dataUsingEncoding(NSUTF8StringEncoding)        }                //创建网络请求会话        let task =  NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in            callback(data: data, response: response , error: error)        })        task.resume()    }        //组合参数    func buildParams(params: Dictionary<String, AnyObject> = Dictionary<String, AnyObject>()) -> String {        var newURL = ""        for (key,value) in params{            newURL +=  (key + "=" + (value as! String) + "&")        }        newURL = newURL.substringToIndex(newURL.characters.indexOf(newURL.characters.last!)!)        return newURL    }}

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