Who can tell me that what those code mean?

Question

I am not a good developer who can tell me that what those code mean? as simple as if...else...;

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
  // code here
#pragma clang diagnostic pop

Answer 1

The code enables you to ignore compiler warnings between

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"

and

#pragma clang diagnostic pop

See: https://stackoverflow.com/a/28276178/5283648

Answer 2

consider a scenario you are writing a perform selector which is not implemented. But if you don't want that warning. Please declare like below:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    [self.ticketTarget performSelector: self.ticketAction withObject: self];
#pragma clang diagnostic pop