Quickies for Core Animation

---

General

• Core Animation layer style properties [permalink]
  I can never remember the link to the Core Animation Layer Style Properties Layer Style Property Animations (probably because Apple keeps moving it)

  You might need to include this too:

  #import <QuartzCore/QuartzCore.h>

• Implicit Core Animation, with cleanup [permalink]
  

      [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];
          }];
  

• Rotating a layer by 90 degrees [permalink]
  To rotate a 'flat' layer, gotta convert degrees to radians, and then rotate around a vector along the z axis.

  hooverLayer.transform = CATransform3DRotate(CATransform3DIdentity,
                                              90.0 * M_PI / 180.0,
                                              0.0f, 0.0f, 1.0f);
  

---