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
950
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
380
Atomic programming
dryman
0
280
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
500
Type qualifier and friends
dryman
1
110
Other Decks in Technology
See All in Technology
入社後SREチームのミッションや課題の整理をした話
morix1500
1
240
低レイヤを知りたいPHPerのためのCコンパイラ作成入門 / Building a C Compiler for PHPers Who Want to Dive into Low-Level Programming
tomzoh
0
130
いつも初心者向けの記事に助けられているので得意分野では初心者向けの記事を書きます
toru_kubota
2
110
”知のインストール”戦略:テキスト資産をAIの文脈理解に活かす
kworkdev
PRO
9
3.8k
AIエージェントの地上戦 〜開発計画と運用実践 / 2025/04/08 Findy W&Bミートアップ #19
smiyawaki0820
21
7.2k
IVRyにおけるNLP活用と NLP2025の関連論文紹介
keisukeosone
0
150
20250328_RubyKaigiで出会い鯛_____RubyKaigiから始まったはじめてのOSSコントリビュート.pdf
mterada1228
0
480
.mdc駆動ナレッジマネジメント/.mdc-driven knowledge management
yodakeisuke
23
8.2k
SaaSプロダクト開発におけるバグの早期検出のためのAcceptance testの取り組み
kworkdev
PRO
0
570
開発視点でAWS Signerを考えてみよう!! ~コード署名のその先へ~
masakiokuda
3
110
LINEギフトのLINEミニアプリアクセシビリティ改善事例
lycorptech_jp
PRO
0
350
サーバシステムを無理なくコンテナ移行する際に伝えたい4つのポイント/Container_Happy_Migration_Method
ozawa
1
130
Featured
See All Featured
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
135
33k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.7k
Code Review Best Practice
trishagee
67
18k
Music & Morning Musume
bryan
47
6.4k
Adopting Sorbet at Scale
ufuk
76
9.3k
Fireside Chat
paigeccino
37
3.4k
Art, The Web, and Tiny UX
lynnandtonic
298
20k
The Language of Interfaces
destraynor
157
24k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
356
30k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
2.9k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
28
1.6k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
7
640
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