One Quickie

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Implicit Core Animation, with cleanup (Core Animation->General)

    [UIView animateWithDuration: kZoomAnimationDuration
            animations: ^{
            CGRect frame = self.labelZoomTapView.frame;
            self.zoomedLabelView.frame = frame;
            // and change whatever other properties that will lead to animation.
        } completion: ^(BOOL finished) {
            // or whatever cleanup you have to do
            [self.zoomedLabelView removeFromSuperview];
        }];