iOS 加密
c# 代码:
public static string GetSignature(string url, string key)
{
Uri uri = new Uri(url);
byte[] sequence = ASCIIEncoding.UTF8.GetBytes(HttpUtility.UrlDecode(uri.PathAndQuery));//uri.PathAndQuery请求参数
HMACSHA1 algorithm = new HMACSHA1(Encoding.UTF8.GetBytes(key.ToLower()));
return Convert.ToBase64String(algorithm.ComputeHash(sequence));
}
怎么 转化为 oc 代码