Edit Question - KnowledgeHub

Title Body

NOTE: This was due to a bug in some XCode beta versions that has long been fixed. This Question and answer will probably not help you if you have problems with ARC. I am migrating my project from manual reference counting to ARC, and have stumbled upon a problem: How can I ensure that a custom setter for a retain property actually retains? In myClass.h , I've declared a property: @property (retain) NSDate *date . It doesn't matter whether I manually set a __strong ivar or have it autogenerated. In the implementation, I have of course @synthesize date , and implemented a custom setter (or just download the demo Xcode project ): - (void)setDate:(NSDate *)newDate { if (allowedToSetNewDate) { date = newDate; } } This does not seem to retain the date, and gives me message sent to deallocated instance when newName is (auto-) released where it came from, when trying to access myClass.date later (provided Zombie is enabled; otherwise, it just crashes silently). Changing the setter to use date = [newDate copy] works around the error, but isn't really what I want. Deleting the custom setter also works, but is obviously not desireable. What am I missing here? How can I ensure that a custom setter for a retain property actually retains in an ARC environment? This seems such a basic and common task that I think I'm overlooking something very obvious. (NOTE: This does not fall under the terms of any Apple NDA, as ARC is publically released as part of LLVM) EDIT: I've created a small Xcode project to demo the issue and uploaded it to github. Feel free to download it and play around. I'm at my

Tags (comma-separated) Cancel