error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/getter

Question

I recently tried to compile an older Xcode project (which used to compile just fine), and now I\'m seeing a lot of errors of this form:

error: w

Answer 1

This question, among the other top hits you get from searching for "objective C custom property", are not updated with information about "setter =" or "getter =".

So, to supply more information on this question:

You can supply the @property call with your own method by writing

    @property(setter = MySetterMethod:, getter = MyGetterMethod)

Notice the colon for the supplied setter method.

Reference Apple documentation

EDIT: I'm not quite sure how the new changes to Objective-C's properties (they are much more intelligent now) change the answers to this question. Perhaps it should all be marked as out of date.