我的json数据文件放到了datas目录下：右键该目录，使用“add files to” 把projectTimeList.txt加到该目录，形成结构如下：

projectTimeList.txt的内容如下：

{
"ResultCode":2,"Record":[
{
"pid":"p001","pname":"山洪灾害监测预警","budget":80,"profit":20,"cost":[10,20,22,19,14,10]
},{
"pid":"p002","pname":"小流域洪水分析","budget":100,"profit":50,"cost":[20,23,10,4,2]
}
]}

在代码中读取该文件并解析的代码如下（不需要第三方类库）

 //文件路径获取
        let pathFull=NSBundle.mainBundle().pathForResource("projectTimeList",ofType: "txt")!
        do{
            //读取文件
            let jsonData=NSData(contentsOfFile: pathFull)!
            //转成json对象
            let jsonObject : AnyObject! = try NSJSONSerialization.JSONObjectWithData(jsonData,options: NSJSONReadingOptions.MutableContainers )
            //把record转为数组
            if let statusesArray = jsonObject.objectForKey("Record") as? NSMutableArray{
                for arow in statusesArray{
                    //取出属性值
                    print(arow["pname"])
                   
                }
            }
        }catch let error as NSError{
            print(error.localizedDescription)
        }