if comming this type of error....."_OBJC_CLASS_$_CAMediaTimingFunction", referenced from: objc-class-ref-to-CAMediaTimingFunction in mainViewController_iPad.o "_OBJC_CLASS_$_CABasicAnimation", referenced from: objc-class-ref-to-CABasicAnimation in mainViewController_iPad.o "_kCAMediaTimingFunctionEaseIn", referenced from: _kCAMediaTimingFunctionEaseIn$non_lazy_ptr in mainViewController_iPad.o (maybe you meant: _kCAMediaTimingFunctionEaseIn$non_lazy_ptr) "_OBJC_CLASS_$_CAKeyframeAnimation", referenced from: objc-class-ref-to-CAKeyframeAnimation in mainViewController_iPad.o "_OBJC_CLASS_$_CAAnimationGroup", referenced from: objc-class-ref-to-CAAnimationGroup in mainViewController_iPad.o "_CATransform3DIdentity", referenced from: _CATransform3DIdentity$non_lazy_ptr in mainViewController_iPad.o (maybe you meant: _CATransform3DIdentity$non_lazy_ptr)

we add QuartzCore.framework in project

error comes apple Macho...something like that