iOS AFNetworking中cookie重定向代码

// 1. 取出需要同步的url (登录请求中返回的重定向地址)
BESTHttpItem *httpItem = [BESTHttpHelper sharedHelper].curHttpItem;
NSString *url = [NSString stringWithFormat:@"%@/#/login", httpItem.frontend_addr];
// 2. 取出当前的headerFields
NSDictionary *headerFields = [NSHTTPCookie requestHeaderFieldsWithCookies:self.cookies];
// 3. 替换cookie地址
[NSHTTPCookie cookiesWithResponseHeaderFields:headerFields forURL:[NSURL URLWithString:url]];