I want to check the existence of various API endpoints by doing serial URL request. If the first one fails, I want to try the second one, if the second fails I want to try the third one, etc.Here is some code I use to do this:self.apiEndpoint = kApiAjaxEndpoint;[self testEndpointWithBlock:^(id response, NSError *error) {    if (error) {        self.apiEndpoint = kApiAjaxLegacyEndpoint;        [self testEndpointWithBlock:^(id response, NSError *error) {            if (error) {                self.apiEndpoint = kApiRestEndpoint;            }            [self saveApiEndpoint];        }];    } else {        [self saveApiEndpoint];    }}];So for now I'm only testing for 2 API endpoints but the moment I add a new endpoint I would need to add another call to testEndpointWithBlock: with error handling code.I was wondering if you can think of a more elegant way of doing this?
Multiple serial URL requests in Objective-C / iOS
objective c;api;ios;url