How to implement multiple NSURLConnection sending?

Question

Objective-C

In my program, I need to send several requests in a row using NSURLConnection, and I send them in the body of the loop one by one, changing only the address of the GET request, but the response comes only from the first request, the rest are nil.
Most likely, I incorrectly implemented the mechanism for sending requests, how can I implement it correctly? I receive the answer through delegates in the same controller.

Answer 1

I think the error is in the 4th line.