import UIKit
let path=(NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory,NSSearchPathDomainMask.UserDomainMask, true)[0] as String).stringByAppendingString("user.data")

class User: NSObject,NSCoding {
    var age:Int = 0
    var name:String?
    init() {
        super.init()
    }
    init(coder aDecoder: NSCoder!)
    {
        super.init()
        self.age=aDecoder.decodeIntegerForKey("age")
        self.name=aDecoder.decodeObjectForKey("name") as? String

    }
    func encodeWithCoder(aCoder: NSCoder!) {
        aCoder.encodeInteger(self.age, forKey: "age")
        aCoder.encodeObject(self.name, forKey: "name")
    }
    class func save(user:User)->Bool{
        return NSKeyedArchiver.archiveRootObject(user, toFile: path)
    }
    
    class func user()->User?{
      return  NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? User
    }
}