Is it possible to create a single NSURLConnection call method for the entire application?

Question

iOS

Good day!
Essence of the question: the IOS application has several different ViewControllers, let's say 5, each is processed by its own class, and in 3 of them the same structure of requesting data from the server is processed:

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

and further processing of the response in methods: - (void)connection:...
How can this design be optimized, for example, so that each ViewController accesses a separate common class with methods, where the logic of requesting data from the server would be processed and the processed response would be returned to the ViewController class?

Answer 1

Usually, a singleton (or something similar to a singleton with the possibility of emergency re-creation) is created to communicate with the server. In which requests and yurls are encapsulated. The methods take blocks in the parameter to process the response of the server or delegate.