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Alvin Zeng
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Aug 1, 2014
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| // | ||
| // CEPanAnimationController.h | ||
| // TransitionsDemo | ||
| // | ||
| // Created by Alvin Zeng on 01/08/2014. | ||
| // Copyright (c) 2014 Alvin Zeng. All rights reserved. | ||
| // | ||
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| #import "CEReversibleAnimationController.h" | ||
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| /** | ||
| Animates between the two view controllers by performing a simple pan. | ||
| */ | ||
| @interface CEPanAnimationController : CEReversibleAnimationController | ||
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| @end |
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| // | ||
| // CEPanAnimationController.m | ||
| // TransitionsDemo | ||
| // | ||
| // Created by Alvin Zeng on 01/08/2014. | ||
| // Copyright (c) 2014 Alvin Zeng. All rights reserved. | ||
| // | ||
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| #import "CEPanAnimationController.h" | ||
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| @implementation CEPanAnimationController | ||
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| - (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext fromVC:(UIViewController *)fromVC toVC:(UIViewController *)toVC fromView:(UIView *)fromView toView:(UIView *)toView { | ||
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| self.duration = .3; | ||
| // Add the toView to the container | ||
| UIView* containerView = [transitionContext containerView]; | ||
| [containerView addSubview:toView]; | ||
| toView.frame = CGRectMake(self.reverse ? -160 : 320, toView.frame.origin.y, toView.frame.size.width, toView.frame.size.height); | ||
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| self.reverse ? [containerView sendSubviewToBack:toView] : [containerView bringSubviewToFront:toView]; | ||
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| // animate | ||
| NSTimeInterval duration = [self transitionDuration:transitionContext]; | ||
| [UIView animateWithDuration:duration animations:^{ | ||
| fromView.frame = CGRectMake(!self.reverse ? -160 : 320, fromView.frame.origin.y, fromView.frame.size.width, fromView.frame.size.height); | ||
| toView.frame = CGRectMake(0, toView.frame.origin.y, toView.frame.size.width, toView.frame.size.height); | ||
| } completion:^(BOOL finished) { | ||
| if ([transitionContext transitionWasCancelled]) { | ||
| toView.frame = CGRectMake(0, toView.frame.origin.y, toView.frame.size.width, toView.frame.size.height); | ||
| fromView.frame = CGRectMake(0, fromView.frame.origin.y, fromView.frame.size.width, fromView.frame.size.height); | ||
| } else { | ||
| // reset from- view to its original state | ||
| [fromView removeFromSuperview]; | ||
| fromView.frame = CGRectMake(!self.reverse ? -160 : 320, fromView.frame.origin.y, fromView.frame.size.width, fromView.frame.size.height); | ||
| toView.frame = CGRectMake(0, toView.frame.origin.y, toView.frame.size.width, toView.frame.size.height); | ||
| } | ||
| [transitionContext completeTransition:![transitionContext transitionWasCancelled]]; | ||
| }]; | ||
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| } | ||
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| @end |
19 changes: 19 additions & 0 deletions
19
InteractionControllers/CEHorizontalSwipeRightInteractionController.h
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| // | ||
| // CEHorizontalSwipeRightInteractionController.h | ||
| // TransitionsDemo | ||
| // | ||
| // Created by Alvin Zeng on 01/08/2014. | ||
| // Copyright (c) 2014 im.luguo. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| #import "CEBaseInteractionController.h" | ||
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| /** | ||
| A horizontal swipe interaction controller. When used with a navigation controller, a left-to-right swipe | ||
| will cause a 'pop' navigation. When used wth a tabbar controller, right-to-left and left-to-right cause navigation | ||
| between neighbouring tabs. | ||
| */ | ||
| @interface CEHorizontalSwipeRightInteractionController : CEBaseInteractionController | ||
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| @end |
118 changes: 118 additions & 0 deletions
118
InteractionControllers/CEHorizontalSwipeRightInteractionController.m
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| // | ||
| // CEHorizontalSwipeRightInteractionController.m | ||
| // TransitionsDemo | ||
| // | ||
| // Created by Alvin Zeng on 01/08/2014. | ||
| // Copyright (c) 2014 im.luguo. All rights reserved. | ||
| // | ||
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| #import "CEHorizontalSwipeRightInteractionController.h" | ||
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| @implementation CEHorizontalSwipeRightInteractionController { | ||
| BOOL _shouldCompleteTransition; | ||
| UIViewController *_viewController; | ||
| UIPanGestureRecognizer *_gesture; | ||
| CEInteractionOperation _operation; | ||
| } | ||
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| -(void)dealloc { | ||
| [_gesture.view removeGestureRecognizer:_gesture]; | ||
| } | ||
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| - (void)wireToViewController:(UIViewController *)viewController forOperation:(CEInteractionOperation)operation{ | ||
| _operation = operation; | ||
| _viewController = viewController; | ||
| [self prepareGestureRecognizerInView:viewController.view]; | ||
| } | ||
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| - (void)prepareGestureRecognizerInView:(UIView*)view { | ||
| _gesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleGesture:)]; | ||
| [view addGestureRecognizer:_gesture]; | ||
| } | ||
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| - (CGFloat)completionSpeed | ||
| { | ||
| return 1 - self.percentComplete; | ||
| } | ||
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| - (void)handleGesture:(UIPanGestureRecognizer*)gestureRecognizer { | ||
| CGPoint translation = [gestureRecognizer translationInView:gestureRecognizer.view.superview]; | ||
| CGPoint vel = [gestureRecognizer velocityInView:gestureRecognizer.view]; | ||
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| switch (gestureRecognizer.state) { | ||
| case UIGestureRecognizerStateBegan: { | ||
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| BOOL leftToRightSwipe = vel.x > 0; | ||
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| // perform the required navigation operation ... | ||
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| if (_operation == CEInteractionOperationPop) { | ||
| // for pop operation, fire on right-to-left | ||
| if (leftToRightSwipe) { | ||
| self.interactionInProgress = YES; | ||
| [_viewController.navigationController popViewControllerAnimated:YES]; | ||
| } | ||
| } else if (_operation == CEInteractionOperationTab) { | ||
| // for tab controllers, we need to determine which direction to transition | ||
| if (leftToRightSwipe) { | ||
| if (_viewController.tabBarController.selectedIndex < _viewController.tabBarController.viewControllers.count - 1) { | ||
| self.interactionInProgress = YES; | ||
| _viewController.tabBarController.selectedIndex++; | ||
| } | ||
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| } else { | ||
| if (_viewController.tabBarController.selectedIndex > 0) { | ||
| self.interactionInProgress = YES; | ||
| _viewController.tabBarController.selectedIndex--; | ||
| } | ||
| } | ||
| } else { | ||
| // for dismiss, fire regardless of the translation direction | ||
| self.interactionInProgress = YES; | ||
| [_viewController dismissViewControllerAnimated:YES completion:nil]; | ||
| } | ||
| break; | ||
| } | ||
| case UIGestureRecognizerStateChanged: { | ||
| if (self.interactionInProgress) { | ||
| // compute the current position | ||
| CGFloat fraction = fabsf(translation.x / 200.0); | ||
| fraction = fminf(fmaxf(fraction, 0.0), 1.0); | ||
| _shouldCompleteTransition = (fraction > 0.5); | ||
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| //Quick Move | ||
| if(!_shouldCompleteTransition) { | ||
| _shouldCompleteTransition = vel.x > 600; | ||
| } | ||
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| // if an interactive transitions is 100% completed via the user interaction, for some reason | ||
| // the animation completion block is not called, and hence the transition is not completed. | ||
| // This glorious hack makes sure that this doesn't happen. | ||
| // see: https://github.com/ColinEberhardt/VCTransitionsLibrary/issues/4 | ||
| if (fraction >= 1.0) | ||
| fraction = 0.99; | ||
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| [self updateInteractiveTransition:fraction]; | ||
| } | ||
| break; | ||
| } | ||
| case UIGestureRecognizerStateEnded: | ||
| case UIGestureRecognizerStateCancelled: | ||
| if (self.interactionInProgress) { | ||
| self.interactionInProgress = NO; | ||
| if (!_shouldCompleteTransition || gestureRecognizer.state == UIGestureRecognizerStateCancelled) { | ||
| [self cancelInteractiveTransition]; | ||
| } | ||
| else { | ||
| [self finishInteractiveTransition]; | ||
| } | ||
| } | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
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| @end |
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