Problem on page 311


After completing the code for the section “Objective-C selector magic”, I keep getting a semantic issue.

“PerformanceSelector may cause a leak because its selector is unknown”. I have tried building the app anyway and the build will succeed but promptly crash after an exception gets thrown. I have tried using the pragma mark solution to ignore the error but the application will crash anyway. I tried finishing the rest of the code for the chapter hoping it would remedy the issue, but to no avail.

Has anyone else run into this issue? Any help on this problem would be greatly appreciated.



Could you share your code please?


Sorry I figured out the issue. It ended up being an issue with the hierarchy in my HomepwnerItemCell.xib file which was causing the crash to happen.


Hi im having the same issue, could you tell me how exactly you were able to fix it?