Physics-Based Interfaces with UIKit Dynamics

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Physics-Based Interfaces with UIKit Dynamics Adam May @yammada ! Sam Kirchmeier @skirchmeier

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Agenda

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Introduction ! ! !

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Introduction Examples ! !

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Introduction Examples Deconstruction !

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Introduction Examples Deconstruction Collection Views

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! Examples Deconstruction Collection Views Limitations & Gotchas Introduction

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Introduction

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Introduced with iOS 7 Not a separate framework – built into UIKit Can be anywhere you're using UIKit

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Another tool in your tool belt

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Physics-Based Interfaces

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Classical Mechanics

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Classical mechanics is concerned with the set of physical laws describing the motion of bodies under the action of a system of forces.

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2014

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2014 2007

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2014 2007

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2014 2007 1972

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Pong: the original physics-based interface.

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More Recent Examples

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UIKit Dynamics

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Natural, real-world interactions Without very much code Beautiful API Fun Knowledge of physics not required

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UIView

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UIView UIDynamicAnimator Reference View

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UIView UIDynamicAnimator Reference View UIGravityBehavior

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UIView UIDynamicAnimator Reference View UIGravityBehavior UICollisionBehavior

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UIDynamicItem Protocol !

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UIDynamicItem Protocol UIView UICollectionViewLayoutAttributes

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UIDynamicBehaviors

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UIDynamicBehavior Base Class

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UICollisionBehavior UIGravityBehavior ! ! !

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UICollisionBehavior UIGravityBehavior UIAttachmentBehavior UIDynamicItemBehavior UIPushBehavior UISnapBehavior

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Demo

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Deconstruction

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UICollisionBehavior UIGravityBehavior UIAttachmentBehavior UIDynamicItemBehavior UIPushBehavior UISnapBehavior

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1. Create a UIDynamicAnimator. 2. Recognize a touch, and add an attachment behavior. 3. Update the attachment’s anchor point during the gesture. 4. When the gesture ends, add a snap behavior or a push behavior.

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Demo

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Collection Views

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Gotchas

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Only 2D Hard to visualize Weird units Everything’s a square Not perfect for games

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Recap

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Introduced UIKit Dynamics PhotoFling Demo TweetBattle Demo Limitations & Gotchas

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Thanks!

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Discussion https://github.com/livefront/dynamics Adam May @yammada ! Sam Kirchmeier @skirchmeier