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
Custom Transitions in iOS 7 - Cocoaheads Berlin...
Search
Engin Kurutepe
October 16, 2013
Technology
1
800
Custom Transitions in iOS 7 - Cocoaheads Berlin Talk
Presented on 16.10.2013 in Cocoaheads Berlin
Engin Kurutepe
October 16, 2013
Tweet
Share
Other Decks in Technology
See All in Technology
業務自動化プラットフォーム Google Agentspace に入門してみる #devio2025
maroon1st
0
200
Modern_Data_Stack最新動向クイズ_買収_AI_激動の2025年_.pdf
sagara
0
220
Adminaで実現するISMS/SOC2運用の効率化 〜 アカウント管理編 〜
shonansurvivors
2
340
Trust as Infrastructure
bcantrill
0
350
英語は話せません!それでも海外チームと信頼関係を作るため、対話を重ねた2ヶ月間のまなび
niioka_97
0
130
JAZUG 15周年記念 × JAT「AI Agent開発者必見:"今"のOracle技術で拡張するAzure × OCIの共存アーキテクチャ」
shisyu_gaku
0
130
Access-what? why and how, A11Y for All - Nordic.js 2025
gdomiciano
1
120
pprof vs runtime/trace (FlightRecorder)
task4233
0
170
PLaMo2シリーズのvLLM実装 / PFN LLM セミナー
pfn
PRO
2
1k
社内お問い合わせBotの仕組みと学び
nish01
0
460
Findy Team+のSOC2取得までの道のり
rvirus0817
0
380
AIAgentの限界を超え、 現場を動かすWorkflowAgentの設計と実践
miyatakoji
0
150
Featured
See All Featured
Practical Orchestrator
shlominoach
190
11k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
32
2.2k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
54
3k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
How to train your dragon (web standard)
notwaldorf
96
6.3k
The Invisible Side of Design
smashingmag
301
51k
How to Ace a Technical Interview
jacobian
280
24k
Building a Modern Day E-commerce SEO Strategy
aleyda
43
7.7k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
14k
Code Reviewing Like a Champion
maltzj
525
40k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
3.1k
RailsConf 2023
tenderlove
30
1.2k
Transcript
Custom Transitions in iOS 7 by Engin Kurutepe Cocoaheads Berlin
- 16. Oct 2013
Who? • Engin Kurutepe – @ekurutepe • iOS Team Lead
at Txtr – www.txtr.com • Co-author of Developing an iOS 7 Edge http://bleedingedgepress.com/our-books/ developing-an-ios-7-edge/
Roadmap • Which transitions can be customized? • Anatomy of
a custom transition • A simple example • An interactive example
What can be customized? • Demo Time!
Anatomy A lot of protocols: • UIViewControllerTransitioningDelegate • UIViewControllerInteractiveTransitioning •
UIViewControllerAnimatedTransitioning • UIViewControllerTransitionCoordinator • UIViewControllerContextTransitioning • UIViewControllerTransitionCoordinatorContext
None
Tap!
Tap!
UIKit
UIKit -transitioningDelegate
UIKit TransitioningDelegate
UIKit TransitioningDelegate animationControllerForPresentedController: presentingController: sourceController:
UIKit TransitioningDelegate AnimationController
UIKit TransitioningDelegate AnimationController interactionControllerForPresentation:
UIKit TransitioningDelegate InteractionController AnimationController
UIKit TransitioningDelegate InteractionController AnimationController TransitioningContext
UIKit TransitioningDelegate InteractionController AnimationController TransitioningContext
in Practice… • Assign the transitioning delegate: • Full source
code on Github: https://github.com/iosedgeapp/iOSEdge - (IBAction) presentTapped:(UIButton*)sender { BEPSimpleImageViewController* ivc = [[BEPSimpleImageViewController alloc] init]; ivc.image = [UIImage imageNamed:@"Canyon.jpg"]; ivc.modalPresentationStyle = UIModalPresentationCustom; ivc.transitioningDelegate = self; [self presentViewController:ivc animated:YES completion:nil]; }
in Practice (cont’d) • Transitioning delegate vends an animator: -
(id<UIVCAnimatedTransitioning>) animationControllerForPresentedController:(UIVC*)modal presentingController:(UIVC*)parent sourceController:(UIVC*)source { return [[BEPModalTransitionAnimator alloc] initWithDirection:BEPModelTransitionDirectionPresent]; }
in Practice (cont’d) • Transitioning delegate does not vend an
interaction controller // Not implemented: //- (id<UIViewControllerInteractiveTransitioning>) interactionControllerForPresentation: (id<UIViewControllerAnimatedTransitioning>)animator
in Practice (cont’d) • The animator sets the duration for
the transition - (NSTimeInterval) transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext { return 0.75; }
in Practice (cont’d) • The animator performs the animations -
(void) animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext { UIView* inView = [transitionContext containerView]; UIVC* fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey]; UIView* fromView = [fromVC view]; UIVC* toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey]; UIView* toView = [toVC view]; if (self.direction == BEPModelTransitionDirectionPresent) { [self performPresentationAnimations]; } else { [self performDismissalAnimations]; } }
in Practice (cont’d) • The animator inserts the presented view
• The animator MUST inform the context when transition is finished [inView insertSubview:toView aboveSubview:fromView]; [UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 usingSpringWithDamping:DampingConstant initialSpringVelocity:InitialVelocity options:0 animations:^{ toView.alpha = 1.0; toView.frame = finalRect; toView.transform = CGAffineTransformIdentity; } completion:^(BOOL finished) { [transitionContext completeTransition:YES]; }];
How about interaction? • Demo Time!
How about interaction? • Transitioning Delegate must vend an interaction
controller • Apple provides the UIPercentDrivenInteractiveTransition class • Can drive UIView block-based animations
in Practice… • Transitioning Delegate vends an interaction controller: -
(id <UIVCInteractiveTransitioning>) navigationController:(UINavigationController*)nc interactionControllerForAnimationController:(id<UIVCAnimatedTransitioning>)animator { if (animator == _popper && _popper.interactive) { return _popper; } else { return nil; } }
in Practice (cont’d) • Previously during viewDidAppear… • but not
interactive, no? self.popper = [[BEPNavigationTransitionsPopAnimator alloc] initWithNavigationController:self]; _popper.interactive = NO;
in Practice (cont’d) • Previously during viewDidAppear… • but not
interactive, no? self.popper = [[BEPNavigationTransitionsPopAnimator alloc] initWithNavigationController:self]; _popper.interactive = NO; - (instancetype) initWithNavigationController:(UINavigationController*)nc { if (self = [super init]) { self.parent = nc; UIPinchGestureRecognizer* pgr = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)]; [self.parent.view addGestureRecognizer:pgr]; } return self; }
in Practice (cont’d) • but still not interactive?
in Practice (cont’d) • but still not interactive? - (void)
handlePinch:(UIPinchGestureRecognizer*)gr { CGFloat scale = [gr scale]; switch ([gr state]) { case UIGestureRecognizerStateBegan: self.interactive = YES; _startScale = scale; [self.parent popViewControllerAnimated:YES]; break;
in Practice (cont’d) • Popper driving the animation:
in Practice (cont’d) • Popper driving the animation: case UIGestureRecognizerStateChanged:
{ CGFloat percent = (1.0 - scale/_startScale); [self updateInteractiveTransition:MAX(percent,0.0)]; break; } case UIGestureRecognizerStateEnded: case UIGestureRecognizerStateCancelled: if ([gr velocity] >= 0.0 || [gr state] == UIGestureRecognizerStateCancelled) { [self cancelInteractiveTransition]; } else { [self finishInteractiveTransition]; } self.interactive = NO; break; default: break; } }
Re-cap • Custom transitions very powerful • Complex set of
protocols • But in practice, it’s not that hard… • Source code for the examples available: https://github.com/iosedgeapp/iOSEdge
Further Reading • WWDC 2013 Session 218 • objc.io article
by Chris Eidhof http://www.objc.io/issue-5/view-controller- transitions.html • Developing an iOS 7 Edge (40% off for Cocoaheads): https://gumroad.com/ products/yLKx/cocoaheads