Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Mastering Core Animation
Search
Felix Chern
September 10, 2012
Technology
3
980
Mastering Core Animation
A walkthrough of Core Animation framework
Felix Chern
September 10, 2012
Tweet
Share
More Decks by Felix Chern
See All by Felix Chern
達到硬體極限的演算法設計
dryman
0
410
Atomic programming
dryman
0
290
我在廣告業學到的 大數據實戰技巧
dryman
1
1.2k
Introduction to Big Data Engineering
dryman
1
520
Type qualifier and friends
dryman
1
120
Other Decks in Technology
See All in Technology
Autonomous Database - Dedicated 技術詳細 / adb-d_technical_detail_jp
oracle4engineer
PRO
4
10k
CDK CLIで使ってたあの機能、CDK Toolkit Libraryではどうやるの?
smt7174
4
190
いま注目のAIエージェントを作ってみよう
supermarimobros
0
340
Oracle Cloud Infrastructure IaaS 新機能アップデート 2025/06 - 2025/08
oracle4engineer
PRO
0
110
20250912_RPALT_データを集める→とっ散らかる問題_Obsidian紹介
ratsbane666
0
100
共有と分離 - Compose Multiplatform "本番導入" の設計指針
error96num
2
1.1k
企業の生成AIガバナンスにおけるエージェントとセキュリティ
lycorptech_jp
PRO
2
190
なぜテストマネージャの視点が 必要なのか? 〜 一歩先へ進むために 〜
moritamasami
0
240
スクラムガイドに載っていないスクラムのはじめかた - チームでスクラムをはじめるときに知っておきたい勘所を集めてみました! - / How to start Scrum that is not written in the Scrum Guide 2nd
takaking22
1
140
バイブスに「型」を!Kent Beckに学ぶ、AI時代のテスト駆動開発
amixedcolor
2
580
「全員プロダクトマネージャー」を実現する、Cursorによる仕様検討の自動運転
applism118
22
12k
AIのグローバルトレンド2025 #scrummikawa / global ai trend
kyonmm
PRO
1
310
Featured
See All Featured
Side Projects
sachag
455
43k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
Making Projects Easy
brettharned
117
6.4k
Building Applications with DynamoDB
mza
96
6.6k
Context Engineering - Making Every Token Count
addyosmani
3
58
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
234
17k
The Pragmatic Product Professional
lauravandoore
36
6.9k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.4k
4 Signs Your Business is Dying
shpigford
184
22k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.7k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
18
1.1k
Into the Great Unknown - MozCon
thekraken
40
2k
Transcript
Mastering Core Animation Felix Chern (dryman) 12年9月10日星期⼀一
Felix Chern (dryman) Research assistant & iOS developer github id:
idryman twitter id: @idryman blog: idryman.org 12年9月10日星期⼀一
Core Animation • Low level objective c rendering and animation
classes used by UIView and UIKit • High performance rendering with simple programming model • Lightweight data structure 12年9月10日星期⼀一
- classes • CAAnimation • CAAnimationGroup • CABasicAnimation • CADisplayLink
• CAEAGLLayer • CAKeyframeAnimation • CALayer • CAEmitterCell • CAEmitterLayer • CAGradientLayer • CAMediaTimingFunction • CAPropertyAnimation • CAScrollLayer • CATextLayer • CATiledLayer • CATransaction • CATransition - protocols • CAAction • CALayoutManager • CAMediaTiming QuartzCore/QuartzCore.h 12年9月10日星期⼀一
- classes • CAAnimation • CAAnimationGroup • CABasicAnimation • CADisplayLink
• CAEAGLLayer • CAKeyframeAnimation • CALayer • CAEmitterCell • CAEmitterLayer • CAGradientLayer • CAMediaTimingFunction • CAPropertyAnimation • CAScrollLayer • CATextLayer • CATiledLayer • CATransaction • CATransition - protocols • CAAction • CALayoutManager • CAMediaTiming Layer provides contents 12年9月10日星期⼀一
- classes • CAAnimation • CAAnimationGroup • CABasicAnimation • CADisplayLink
• CAEAGLLayer • CAKeyframeAnimation • CALayer • CAEmitterCell • CAEmitterLayer • CAGradientLayer • CAMediaTimingFunction • CAPropertyAnimation • CAScrollLayer • CATextLayer • CATiledLayer • CATransaction • CATransition - protocols • CAAction • CALayoutManager • CAMediaTiming Animation defines how properties are animated 12年9月10日星期⼀一
- classes • CAAnimation • CAAnimationGroup • CABasicAnimation • CADisplayLink
• CAEAGLLayer • CAKeyframeAnimation • CALayer • CAEmitterCell • CAEmitterLayer • CAGradientLayer • CAMediaTimingFunction • CAPropertyAnimation • CAScrollLayer • CATextLayer • CATiledLayer • CATransaction • CATransition - protocols • CAAction • CALayoutManager • CAMediaTiming These allows you to create custom animations and Core Animation add-ons 12年9月10日星期⼀一
• Much like UIView • can set content image, or
draw with Quartz 2D • When you change properties, you will trigger implicit animations CALayer Emitter Layer and Cells CALayer with border and corner radius 12年9月10日星期⼀一
CAAnimation • implicit • layer.position = CGPointMake(x,y); • explicit •
setup CAAnimation • layer addAnimation: forKey: • layer removeAnimationForKey: 12年9月10日星期⼀一
Explicit CAAnimation CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"]; animation.fromValue = @1.0;
animation.toValue = @0.0; animation.autoreverse = YES; animation.repeatCount = INFINITY; animation.duration = 2.0; [layer addAnimation: animation forKey:@"animateOpacity"]; 12年9月10日星期⼀一
time property CABasicAnimation fromValue: toValue: 12年9月10日星期⼀一
time property CABasicAnimation fromValue: toValue: 12年9月10日星期⼀一
time property CABasicAnimation fromValue: toValue: time property CAKeyFrameAnimation fromValue: toValue:
12年9月10日星期⼀一
time property CABasicAnimation fromValue: toValue: time property CAKeyFrameAnimation fromValue: toValue:
NSString * const kCAAnimationLinear; NSString * const kCAAnimationDiscrete; NSString * const kCAAnimationPaced; NSString * const kCAAnimationCubic; NSString * const kCAAnimationCubicPaced; 12年9月10日星期⼀一
CALayer Properties 1 frame property 2 bounds property 3 position
property 4 zPosition property 5 anchorPointZ property 6 anchorPoint property 7 contentsScale property 8 – affineTransform 9 – setAffineTransform: 10 transform property 11 sublayerTransform property 1 contentsGravity property 2 opacity property 3 hidden property 4 masksToBounds property 5 doubleSided property 6 mask property 7 cornerRadius property 8 borderWidth property 9 borderColor property 10 backgroundColor property 11 backgroundFilters property 12 shadowOpacity property 13 shadowRadius property 14 shadowOffset property 15 shadowColor property 16 shadowPath property 17 filters property 18 compositingFilter property 19 style property Most Animations can be created by CAAnimation and CALayer Properties! 12年9月10日星期⼀一
Excepts... 12年9月10日星期⼀一
• Scrolling • Animation related to motion • Animation related
to AVFoundation inputs • Animation related to other continuous event sources In these cases, we need to control frames ourselves 12年9月10日星期⼀一
• Pros: • Won’t miss any data sources • Easier
to implement with delegates • Cons: • Does not allow frame drop • Harder to control timing Push based 12年9月10日星期⼀一
Pull based • Pros • Let CADisplayLink setup runloop, timing,
and everything else • Cons • Event source has to be pullable 12年9月10日星期⼀一
-(void)update { float x_acc, y_acc, phi, a_eff; if (self.sharedManager.accelerometerActive) {
CMAccelerometerData *accData = self.sharedManager.accelerometerData; x_acc = accData.acceleration.x; y_acc = accData.acceleration.y; } else { x_acc = 0; y_acc = -1.0; } /* calculations */ [CATransaction begin]; [CATransaction setDisableActions:YES]; self.bar1.angle = self.current[0]; self.bar2.angle = self.current[1]; self.bar2.position = self.bar1.tailPosition; self.emitterLayer.emitterPosition = self.bar1.tailPosition; self.emitterCell.birthRate = floorf(fabsf(self.current[2]-self.current[3])*10); self.emitterCell.velocity = fabsf(self.bar1.length*self.current[2]); [CATransaction commit]; } _displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)]; [self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode]; Pull data from accelerometer Disable implicit animation Setup CADisplayLink for updating data Use [_displayLink setPause:YES] to stop animation 12年9月10日星期⼀一
Custom CAAnimation • Use CADisplayLink for runloop • CATransaction for
stoping implicit animation • Confirms to CAMediaTiming protocol • Use CACurrentMediaTime to pull timestamp 12年9月10日星期⼀一
Tips and Tricks 12年9月10日星期⼀一
KeyValue Coding [mySubLayer setName: @"rocket"]; otherLayer.emitterCells = @[mySubLayer, ...]; [otherLayer
setValue: @3.0 forKeyPath: @"emitterCells.rocket.emissionRange"]; 12年9月10日星期⼀一
More on explicit Animation [CATranscation begin]; [CATranscation setDisableActions:YES]; circleLayer.opacity =
0; CABasicAnimation *fade; fade = [CABasicAnimation animationWithKeyPath:@"opacity"]; fade.duration = 1; fade.fromValue = @1.0; fade.toValue = @0.0; fade.beginTime = CACurrentMediaTime() + 3.0; [circleLayer addAnimation:fade forKey:@"fade"]; [CATranscation commit]; The layer opacity will be 0 after the animation ends 12年9月10日星期⼀一
CAEmitterLayer & CAEmitterCell Off screen rendering 12年9月10日星期⼀一
Instruments 12年9月10日星期⼀一
Instruments 12年9月10日星期⼀一
Instruments 12年9月10日星期⼀一
Instruments 12年9月10日星期⼀一
Instruments 12年9月10日星期⼀一
References • WWDC 2011 section 421: Core Animation Essentials •
WWDC 2012 section 211: Building Concurrent User Interface on iOS • WWDC 2012 section 235: iOS App Performance: Responsiveness • WWDC 2012 section 238: iOS App Performance: Graphics and Animations • WWDC 2012 section 506: Optimizing 2D Graphics and Animation Performances • iOS 5 programming -- Pushing the limits ISBN: 1119961327 12年9月10日星期⼀一
Questions? 12年9月10日星期⼀一