Subclass access warnings in Objective-C - Printable Version
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Subclass access warnings in Objective-C - vectorscope - Sep 14, 2009 10:37 PM
I am having some potential issues with my code where I am trying to use a getter in a subclass. Basically the code runs normally but I do get a warning during compilation. I am wondering if there is a better way to do this or do I just have to live with the warning.
Here is what is going on:
So if I create an array of SubObjects:
And then I try to use that array:
When I compile this I get a warning saying "warning: no '-value' method found"
When I run it it works and does print out the right value...
Even if I change it to this:
I still get the warning...
Any insight would be greatly appreciated.
Subclass access warnings in Objective-C - SethWillits - Sep 14, 2009 11:35 PM
SuperObject doesn't define -value, so calling -value on a SuperObject is going to give you a warning. That is a good and expected thing.
Solution? Either use the type "id" instead of SuperObject in that spot* or use SubObject.
You're using SubObject, but still getting the error. This pretty much guarantees that you forgot to #import "SubObject.h"
* If you use "id", you still need to have imported a header that contains a declaration for -value. -value also needs to be a unique selector for its param/return types otherwise you'll get a warning about multiple methods. If you get that, then you'll need to typecast the id reference to a concrete type to get rid of the warning anyway, so you'd just end up using SubObject anyway.
Subclass access warnings in Objective-C - vectorscope - Sep 15, 2009 10:02 AM
Yes that was exactly it, the darn .h file wasn't being imported. Not sure why anything worked...