let parameters = [
"userId": userId,
"nickName":nickName
]
let newParam = parameters.signParame()
按照一定规则生成校验参数sign,
sign=md5(secretkey+key1value1key2velue2key3value3)
extension Dictionary{
func signParame () ->[String : String]
{
var secretkey:String="******"
var result = [String : String]()
//把其参数按key升序排序
let