collisionBehavior(_:beganContactFor:with:at:)
Called when a collision between two dynamic items has begun.
Declaration
optional func collisionBehavior(_ behavior: UICollisionBehavior, beganContactFor item1: any UIDynamicItem, with item2: any UIDynamicItem, at p: CGPoint)Parameters
- behavior:
The collision behavior that owns the dynamic items that have started to contact each other.
- item1:
The first of the two dynamic items participating in the collision.
- item2:
The second of the two dynamic items participating in the collision.
- p:
The contact point for the collision. The coordinate system that pertains to a collision depends on how you initialized the associated animator. For details, read the Overview of Uidynamicanimator.