// 1. 取出需要同步的url (登錄請求中返回的重定向地址)BESTHttpItem *httpItem = [BESTHttpHelper sharedHelper].curHttpItem;NSString *url = [NSString stringWithFormat:@"%@/#/login", httpItem.frontend_addr];// 2. 取出當前的headerFieldsNSDictionary *headerFields = [NSHTTPCookie requestHeaderFieldsWithCookies:self.cookies];// 3. 替換cookie地址[NSHTTPCookie cookiesWithResponseHeaderFields:headerFields forURL:[NSURL URLWithString:url]];