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    <p>Your problem lies elsewhere.</p> <p>I created your <code>Animal</code>, <code>Dog</code>, and <code>Cat</code> classes, and the four cases you have above passed. For reference, here is my code: <a href="http://pastie.org/774468" rel="nofollow noreferrer">http://pastie.org/774468</a></p> <p>It outputs:</p> <pre><code>2010-01-11 19:45:10.259 EmptyFoundation[83698:a0f] [cat isMemberOfClass:[Cat class]] PASSED 2010-01-11 19:45:10.265 EmptyFoundation[83698:a0f] [dog isMemberOfClass:[Dog class]] PASSED 2010-01-11 19:45:10.265 EmptyFoundation[83698:a0f] [cat isKindOfClass:[Animal class]] PASSED 2010-01-11 19:45:10.273 EmptyFoundation[83698:a0f] [dog isKindOfClass:[Animal class]] PASSED </code></pre> <p>EDIT:</p> <p>I suppose there was a slight possibility that your <code>AnimalFarm</code> object was the source of the error, but I just tried creating the animal objects that way and got the same results (code: <a href="http://pastie.org/774480" rel="nofollow noreferrer">http://pastie.org/774480</a>):</p> <pre><code>2010-01-11 19:51:35.144 EmptyFoundation[83741:a0f] [cat isMemberOfClass:[Cat class]] PASSED 2010-01-11 19:51:35.156 EmptyFoundation[83741:a0f] [dog isMemberOfClass:[Dog class]] PASSED 2010-01-11 19:51:35.157 EmptyFoundation[83741:a0f] ![ant isMemberOfClass:[Cat class]] PASSED 2010-01-11 19:51:35.157 EmptyFoundation[83741:a0f] [cat isKindOfClass:[Animal class]] PASSED 2010-01-11 19:51:35.157 EmptyFoundation[83741:a0f] [dog isKindOfClass:[Animal class]] PASSED 2010-01-11 19:51:35.158 EmptyFoundation[83741:a0f] [ant isKindOfClass:[Animal class]] PASSED </code></pre> <p>EDIT #2:</p> <p>Based on your observation that an if...else if statement works but the switch statement does not, I modified the code I posted above to use a switch statement.... and it worked just fine. So my comment/question stands: In your if/switch statements, you're using these constants <code>DOG</code> and <code>CAT</code>. Where are those defined?</p>
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    1. POObjective c isKindOfClass missunderstanding?
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    1. COWell, I tried to create instances using [Cat new] directly and everything works....so the problem is inside farm
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    2. CO@Vitek - how are you defining `CAT` and `DOG`?
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    3. COwhat do you mean? My code is shown above...
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