addBoundary(withIdentifier:from:to:)
Adds a collision boundary, specified as a line segment, to the collision behavior.
Declaration
func addBoundary(withIdentifier identifier: any NSCopying, from p1: CGPoint, to p2: CGPoint)Parameters
- identifier:
An arbitrary identifier for the boundary you are adding.
- p1:
The starting point for the boundary line segment.
- p2:
The ending point for the boundary line segment.
Discussion
This is a convenience method based on the addBoundary(withIdentifier:for:) method. The coordinate system and origin point for the p1 and p2 parameters depend on how you’ve initialized the dynamic animator (that you’re adding the behavior to). See the overview in UIDynamicAnimator for more information.