ios url上加cooking

 NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:[NSURL URLWithString:url]];

        for (NSHTTPCookie *cookie in cookies){

            

            // cookiesWithResponseHeaderFields方法，需要为URL设置一个cookie为NSDictionary类型的header，注意NSDictionary里面的forKey需要是@"Set-Cookie"

            NSArray *headeringCookie = [NSHTTPCookie cookiesWithResponseHeaderFields:

                                        [NSDictionary dictionaryWithObject:

                                         [[NSString alloc] initWithFormat:@"%@=%@",[cookie name],[cookie value]]

                                                                    forKey:@"Set-Cookie"]

                                                                              forURL:urlString];

            

            // 通过setCookies方法，完成设置，这样只要一访问URL为HOST的网页时，会自动附带上设置好的header

            [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookies:headeringCookie

                                                               forURL:[NSURL URLWithString:url]

                                                      mainDocumentURL:nil];

        }