Today I found out the the zoom in effect in Apple News App and Pinterest App and I wondered how I can achieve similar effect. I read about the blog of Pinterest https://engineering.pinterest.com/blog/behind-pins-building-pinterest-30-ios
and it says
To do this, we used UINavigationControllerDelegate’s animationControllerForOperation method to provide a UIViewControllerAnimatedTransitioning object to perform the transition
and I couldn't figure out what's behind the scene of CBLPinViewTransition of a type UIViewControllerAnimatedTransitioning
It looks like that I may need to programmatically set the zoom-in scale of somehow(I am not sure whether this is possible without the gesture) in the
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
// Perform the animation
}
when I implement the the protocol UIViewControllerAnimatedTransitioning and UIViewControllerTransitioningDelegate as mentioned in Mathew's blog http://mathewsanders.com/animated-transitions-in-swift/
Am I heading to the right direction? Can anyone have any idea about how to implement this.
Yes, that is the right path. In the transition method, take the frame of the original block. Get a snapshot of the view you're transitioning to, and add it to the view at the frame. Then animate its size change to fill the screen.