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
ファッションコーディネートアプリ「WEAR」における、Vertex AI Vector Searchを利用したレコメンド機能の開発・運用で得られたノウハウの紹介
zozotech
PRO
0
620
形式手法特論:位相空間としての並行プログラミング #kernelvm / Kernel VM Study Tokyo 18th
ytaka23
3
1.5k
[kickflow]20250319_少人数チームでのAutify活用
otouhujej
0
150
20250807_Kiroと私の反省会
riz3f7
0
260
薬屋のひとりごとにみるトラブルシューティング
tomokusaba
0
390
AWSの最新サービスでAIエージェント構築に楽しく入門しよう
minorun365
PRO
8
420
Eval-Centric AI: Agent 開発におけるベストプラクティスの探求
asei
0
150
Claude Codeは仕様駆動の夢を見ない
gotalab555
23
7.1k
Google Agentspaceを実際に導入した効果と今後の展望
mixi_engineers
PRO
3
770
AI関数が早くなったので試してみよう
kumakura
0
330
ロールが細分化された組織でSREと協働するインフラエンジニアは何をするか? / SRE Lounge #18
kossykinto
0
240
JAWS-UG のイベントで使うハンズオンシナリオを Amazon Q Developer for CLI で作ってみた話
kazzpapa3
0
120
Featured
See All Featured
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
60k
Building Applications with DynamoDB
mza
96
6.6k
Code Reviewing Like a Champion
maltzj
525
40k
Intergalactic Javascript Robots from Outer Space
tanoku
272
27k
Building an army of robots
kneath
306
45k
Build your cross-platform service in a week with App Engine
jlugia
231
18k
Balancing Empowerment & Direction
lara
2
570
The Cost Of JavaScript in 2023
addyosmani
53
8.8k
Designing for Performance
lara
610
69k
How to Think Like a Performance Engineer
csswizardry
25
1.8k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
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