Attachments
An attachment specifies a dynamic connection between two objects. This allows for the behavior and movement of one object to be tied to the movement of another object. By default, UIAttachmentBehaviors are fixed to the center of an object although any point can be defined as the attachment point.
The sample app builds on the work done in the “Collisions” section. Once again, two image views are used. A boundary collision is created and applied to the UIDynamicAnimator. A new CGPoint is created and set to the reference point of the center of the frog image view. A new UIAttachmentBehavior object is created and initialized using initWithItem:attachedToAnchor:. There are also additional initialization methods on UICollisionBehavior
Get iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
