         
     }
     override var description : String {
-        let keys = ["access_token","expires_in","uid","avatar_large","name"]
+        let keys = ["access_token","expires_in","uid","avatar_large","name","expires_date"]
     return dictionaryWithValuesForKeys(keys).description
     }
     //归档

//保存用户信息
class useAccount: NSObject,NSCoding {
    var  access_token :String?
    var  expires_in:NSTimeInterval=0
    var  uid:String?
    var  avatar_large:String?
    var  name:String?

        uid = aDecoder.decodeObjectForKey("uid") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
        
    }
    //归档
