I think your problem is in the dealloc method. Setting photosThumb photosFull and photoItemArray as nil do not deallocate the objects. Since, you add custom Button to the arrays, you must make sure that each of your custom are properly deallocated.
Your MyScrollView is likely still retained by the superview, window, responder chain, etcetera. In your didReceiveMemoryWarning method you should call self. MyView removeFromSuperview.
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