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78 lines
3.2 KiB
Mathematica
78 lines
3.2 KiB
Mathematica
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//
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// NBModalPushPopTransition.m
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// NewsBlur
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//
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// Created by David Sinclair on 2015-10-23.
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// Copyright © 2015 NewsBlur. All rights reserved.
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//
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// Based on Swift code from https://github.com/stringcode86/SCSafariViewController
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//
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#import "NBModalPushPopTransition.h"
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@implementation NBModalPushPopTransition
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- (id)init {
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if ((self = [super init])) {
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self.dismissing = NO;
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self.percentageDriven = NO;
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}
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return self;
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}
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- (CGFloat)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
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return 0.35;
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}
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- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
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UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
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UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
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UIView *topView = self.dismissing ? fromViewController.view : toViewController.view;
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UIViewController *bottomViewController = self.dismissing ? toViewController : fromViewController;
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UIView *bottomView = bottomViewController.view;
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CGFloat offset = bottomView.bounds.size.width;
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if ([bottomViewController isKindOfClass:[UINavigationController class]]) {
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bottomView = ((UINavigationController *)bottomViewController).topViewController.view;
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}
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[transitionContext.containerView insertSubview:toViewController.view aboveSubview:fromViewController.view];
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if (self.dismissing) {
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[transitionContext.containerView insertSubview:toViewController.view belowSubview:fromViewController.view];
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}
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topView.frame = fromViewController.view.frame;
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topView.transform = self.dismissing ? CGAffineTransformIdentity : CGAffineTransformMakeTranslation(offset, 0.0);
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UIImageView *shadowView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"safari_shadow"]];
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shadowView.contentMode = UIViewContentModeScaleAspectFill;
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shadowView.layer.anchorPoint = CGPointMake(0.0, 0.5);
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shadowView.frame = bottomView.bounds;
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[bottomView addSubview:shadowView];
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shadowView.transform = self.dismissing ? CGAffineTransformMakeScale(0.01, 1.0) : CGAffineTransformIdentity;
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shadowView.alpha = self.dismissing ? 1.0 : 0.0;
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[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 options:[self animationOpts] animations:^{
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topView.transform = self.dismissing ? CGAffineTransformMakeTranslation(offset, 0.0) : CGAffineTransformIdentity;
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shadowView.transform = self.dismissing ? CGAffineTransformIdentity : CGAffineTransformMakeScale(0.01, 1.0);
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shadowView.alpha = self.dismissing ? 0.0 : 1.0;
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} completion:^(BOOL finished) {
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topView.transform = CGAffineTransformIdentity;
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[shadowView removeFromSuperview];
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[transitionContext completeTransition:!transitionContext.transitionWasCancelled];
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}];
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}
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- (UIViewAnimationOptions)animationOpts {
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UIViewAnimationOptions opts = self.percentageDriven ? UIViewAnimationOptionCurveLinear : UIViewAnimationOptionCurveEaseInOut;
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return opts | UIViewAnimationOptionAllowAnimatedContent | UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionLayoutSubviews;
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}
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@end
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