cURL Error Code: 7 cURL Error Message: Failed to connect to 127.0.0.1 port 9200: Connection refused cURL Error Code: 7 cURL Error Message: Failed to connect to 127.0.0.1 port 9200: Connection refused
iOS 中要先用私钥对参数签名,在用公钥对参数做一次签名,该怎么实现,iOS官方库有这样的方法吗?