Alamofire是swift下使用最多的第三方网络请求库，看一下用Alamofire怎么发送网络请求
环境：Xcode7.2 swift2.1.1 Alamofire2.0
首先用CocoaPods下载Alamofire

target "LKQSwift" do
platform :ios,'8.0'
use_frameworks!
pod 'Alamofire','~>2.0'
pod 'SDWebImage','~>3.7'
end

在需要用到网络请求的类 import Alamofire

POST请求：

let url = "http://xxxxxxxxxxxxx"
let dic = ["act":"homepage","act_2":"index","r_type":"1"]
Alamofire.request(.POST, url, parameters: dic, encoding: .URL, headers: nil).validate().responseJSON { (request, response, result) -> Void in
     let jsonDic:NSDictionary = result.value as! NSDictionary
        self.array = jsonDic.objectForKey("list") as! NSArray
        self.tableView.reloadData()
}

GET请求

  let url = "http://xxxxxxxxxxxxx?act=homepage&act_2=index&r_type=1"
  Alamofire.request(.GET, url).validate().responseJSON(completionHandler: { (request, response, result) -> Void in
        print(result.value)
  })

GitHub：AlamofireTest