collisionBehavior(_:beganContactFor:withBoundaryIdentifier:at:)
Called when a collision, between a dynamic item and a collision boundary, has begun.
Declaration
optional func collisionBehavior(_ behavior: UICollisionBehavior, beganContactFor item: any UIDynamicItem, withBoundaryIdentifier identifier: (any NSCopying)?, at p: CGPoint)Parameters
- behavior:
The collision behavior that owns the dynamic item that has started contact with a boundary.
- item:
The dynamic item that has started contact with a boundary.
- identifier:
The identifier of the boundary that the dynamic item has started contact with.
- p:
The collision point on the boundary.