Instance Method

addBoundaryWithIdentifier:fromPoint:toPoint:

Adds a collision boundary, specified as a line segment, to the collision behavior.

Declaration

- (void)addBoundaryWithIdentifier:(id<NSCopying>)identifier fromPoint:(CGPoint)p1 toPoint:(CGPoint)p2;

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 addBoundaryWithIdentifier:forPath: 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.

See Also

Configuring a Collision Behavior

- addBoundaryWithIdentifier:forPath:

Adds a collision boundary, specified as a Bezier path, to the collision behavior.

boundaryIdentifiers

The set of boundary identifiers that you’ve added to the collision behavior.

- boundaryWithIdentifier:

Returns a specified Bezier-path boundary.

collisionMode

The type of edges that participate in collisions for the collision behavior.

- removeAllBoundaries

Removes all previously-specified collision boundaries from the collision behavior.

- removeBoundaryWithIdentifier:

Removes a specific collision boundary from the collision behavior.

- setTranslatesReferenceBoundsIntoBoundaryWithInsets:

Specifies a collision boundary based on the bounds of the animation reference system, with optional insets.

translatesReferenceBoundsIntoBoundary

Specifies whether a boundary based on the reference system is active.