If your Xcode project includes static libraries which further access category methods, you could run into the issue of "selector not recognized" for a custom category method.
The key is to add the -ObjC flag to "Other Linker Flags".
For more details, Apple has a nice Technical Note on this -
https://developer.apple.com/library/mac/qa/qa1490/_index.html
The key is to add the -ObjC flag to "Other Linker Flags".
For more details, Apple has a nice Technical Note on this -
https://developer.apple.com/library/mac/qa/qa1490/_index.html
