IOS swift2.0 Get HTTP 数据请求

    let url:NSURL = NSURL(string: "http://flash.weather.com.cn/wmaps/xml/shanghai.xml")!

    let request:NSURLRequest = NSURLRequest(URL: url)

    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response:NSURLResponse?,data:NSData?,error:NSError?) in

          if(error==nil || data?.length > nil){

//            let testString : String = String(data: data!, encoding: NSUTF8StringEncoding)!

            //数据转换为xml类型

            let weather = NSXMLParser(data:data!)

            weather.delegate = self

            weather.parse()

//            self.requestContent.text=testString

          }

    })