Sample project demonstrating a custom date picker controller (a not so uncommon requirement) implemented with custom view controller transitions. If you're not presenting your custom sheets/alerts/modals/pickers/popups using this API, you're doing it wrong.
Includes 3 custom transition animators:
- Spring transition animator: animates the presentation using UIView spring animations
- Zoom transition animator: simple scale transform animation
- Drop transition animator: simulates a falling object using UIKit Dynamics
- XCode 6
- iOS 8