Creates and returns an attachment behavior where one item slides along the specified axis.
- iOS 9.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
The dynamic item connected by the attachment behavior.
The initial anchor point for the item. Specify this point in the coordinate system of the dynamic animator’s reference view. For more information about coordinate systems, see
The axis of translation, along which the item’s anchor point slides. The magnitude of the vector is ignored. Use the
attachmentproperty to define the distance that the anchor point can travel along the vector.
A new attachment object or
nil if the object could not be created.
The behavior created by this method acts like a solid rod between
item and the anchor point whose initial position you specify using the
point parameter. As forces are applied to the item, the item’s anchor point slides along the specified
axis, causing the item to move with it. The item does not rotate relative to the axis of translation or anchor point.
The axis of translation is infinitely long initially, but you can change the length by assigning a new value to the
attachment property. When specifying a new attachment range, remember that the value in point represents the value
0 on the axis. Any new range you specify must include
You can use this behavior to create an effect of an item sliding in a specific direction in response to other forces. For example, using the vector (0.0, 1.0) would cause the item to slide only vertically.