开发了这些年，做为一个颇有些经验的开发人员来说，我不是很喜欢用别人写的库。除非比较复杂。简单的库还是喜欢自己完成。可以量身打造，随便改动。今天继续贴出来HTTP封装类库，大家相互学习交流下。
HttpClient.swift

import UIKit
class HttpClient: NSObject {
    
    static let TIME_OUT:NSTimeInterval = 10
    
    private static func initRequest(urlString :String)->NSURLRequest! {
        let url = NSURL(string: urlString)
        let request = NSURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringCacheData, timeoutInterval: TIME_OUT)
        return request
    }
    
    private static func initMutableURLRequest(urlString :String)->NSMutableURLRequest! {
        let url = NSURL(string: urlString)
        let request = NSMutableURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringCacheData, timeoutInterval: TIME_OUT)
        return request
    }
    
    static func httpAsynRequest(urlString :String, completionHandler: (HttpResult!) -> Void){
        let request = initRequest(urlString)
        NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) { (response:NSURLResponse?, data:NSData?, error:NSError?) -> Void in
            if error != nil {
                completionHandler(HttpResult(error: error!))
            }else if response != nil {
                let httpResponse = response as! NSHTTPURLResponse
                let httpResult = HttpResult(responseCode: httpResponse.statusCode,data: data!)
                completionHandler(httpResult)
            }
        }
    }
    
    static func httpAsyncPostStringRequest(urlString :String,postData :String, completionHandler: (HttpResult!) -> Void){
        httpAsyncPostRequest(urlString, postData: postData.dataUsingEncoding(NSUTF8StringEncoding)!, completionHandler: completionHandler)
    }
    
    static func httpAsyncPostRequest(urlString :String,postData :NSData, completionHandler: (HttpResult!) -> Void){
        let request = initMutableURLRequest(urlString)
        request.HTTPMethod = "POST"
        request.HTTPBody = postData
        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
        let config = NSURLSessionConfiguration.defaultSessionConfiguration()//默认配置
        config.timeoutIntervalForRequest = TIME_OUT //连接超时时间
        let session = NSURLSession(configuration: config)
        let task = session.dataTaskWithRequest(request) { (data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in
            if error != nil {
                completionHandler(HttpResult(error: error!))
            }else if response != nil {
                let httpResponse = response as! NSHTTPURLResponse
                let httpResult = HttpResult(responseCode: httpResponse.statusCode,data: data!)
                completionHandler(httpResult)
            }
        }
        task.resume()
    }
    
    static func httpPostBinRequest(urlString :String,postData :NSData, completionHandler: (NSData?, NSURLResponse?, NSError?) -> Void){
        let request = initMutableURLRequest(urlString)
        request.HTTPMethod = "POST"
        request.HTTPBody = postData
        let config = NSURLSessionConfiguration.defaultSessionConfiguration()//默认配置
        config.timeoutIntervalForRequest = TIME_OUT //连接超时时间
        let session = NSURLSession(configuration: config)
        let task = session.dataTaskWithRequest(request,completionHandler: completionHandler)
        task.resume()
    }
    
}

HttpResult.swift

import Foundation
class HttpResult: NSObject {
    
    private var responseCode:Int!
    private var responseString:String!
    private var data:NSData!
    private var error:NSError!
    
    init(error:NSError) {
        self.responseCode = 0
        self.responseString = nil
        self.data = nil
        self.error = error
    }
    
    init(responseCode:Int,data:NSData) {
        self.responseCode = responseCode
        self.data = data
    }
    
    func getResponseCode()->Int {
        return self.responseCode
    }
    
    func getResponseString()-> String {
        if self.responseString == nil {
           self.responseString = NSString(data:data!, encoding: NSUTF8StringEncoding) as String!
        }
        return self.responseString
    }
    
    func getData()->NSData {
        return self.data
    }
    
    func isSuccess()-> Bool {
        return self.responseCode == 200
    }
    
}

下面是VC中的点击代码。调用。

    @IBAction func loginClicked(sender: UIButton) {
        HttpClient.httpAsynRequest("http://www.it72.com/json.php") { (result) -> Void in
            if result.isSuccess() {
                JsonParser.parse(result.getData())
                self.presentViewController(self.sideMenuConvtroller, animated: true, completion: nil)
            }else{
                print("登录失败")
            }
        }
    }

也很简单，对吧！

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