iOS 7 introduced UI Dynamics, which provides physics-based animation for UI elements. The overall coordination of UI Dynamics is performed by a MonoTouch.UIKit.UIDynamicAnimator, which holds references to a number of MonoTouch.UIKit.UIDynamicBehaviors, which define behaviors such as gravity, pushing, and collision detection. Each MonoTouch.UIKit.UIDynamicBehavior holds references to some amount of MonoTouch.UIKit.IUIDynamicItems, which represent the objects to which the physics model is applied.

Two classes that implement MonoTouch.UIKit.IUIDynamicItem are MonoTouch.UIKit.UIView and MonoTouch.UIKit.UICollectionViewLayoutAttributes.