Default value of an Objective-C struct and how to test

Question

I\'m trying to test if a property has been set yet. I know that with objects that I\'ve got:

CGRect ppGoalFrame;
LocalPlaySetup *localPlaySetup;

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Answer 1

I don't think you can do a binary comparison of a C structure, which is what CGRect is. A quick Google search and checking the C For Dummies Desk Reference didn't turn anything up. You could declare CGRect ppGoalFrame, initialize the members of the structure with default values (if they're not already), and test the structure members.

Update Edit: This question has been asked for C structures.