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FRPChangeRootViewControllerSegue.m
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FRPChangeRootViewControllerSegue.m
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//
// FRPChangeRootViewControllerSegue.m
//
// Created by Francisco José Rodríguez Pérez on 06/03/12.
// Copyright (c) 2012. All rights reserved.
//
#import "FRPChangeRootViewControllerSegue.h"
#import <QuartzCore/QuartzCore.h>
#import "UIView+Utilities.h"
@interface FRPChangeRootViewControllerSegueTransitionViewController : UIViewController
@property (nonatomic, weak) UIView *sourceView;
@property (nonatomic, weak) UIView *destinationView;
- (UIImage *)cropImage:(UIImage *)image rect:(CGRect)rect;
@end
@implementation FRPChangeRootViewControllerSegueTransitionViewController
- (void)viewWillLayoutSubviews
{
UIImageView *sourceViewSnapshotImageView = [[UIImageView alloc] initWithImage:[self.sourceView snapshotFromView]];
[self.view addSubview:sourceViewSnapshotImageView];
UIImageView *destinationViewSnapshotImageView = [[UIImageView alloc] initWithImage:[self.destinationView snapshotFromView]];
destinationViewSnapshotImageView.frame = CGRectOffset(destinationViewSnapshotImageView.frame, 0, destinationViewSnapshotImageView.frame.size.height);
destinationViewSnapshotImageView.frame = CGRectInset(destinationViewSnapshotImageView.frame, 15.0, 30.0);
[self.view addSubview:destinationViewSnapshotImageView];
[UIView animateWithDuration:0.25 animations:^{
sourceViewSnapshotImageView.frame = CGRectInset(sourceViewSnapshotImageView.frame, 15.0, 30.0);
} completion:^(BOOL finished) {
CGFloat offset = 0;
if (self.destinationView.frame.origin.y == 0.0 && ![self respondsToSelector:@selector(setPreferredContentSize:)]) {
//In iPhone pre iOS 7 the snapshot includes the status bar but not in iPad
offset = 20.0;
}
[UIView animateWithDuration:0.5 animations:^{
destinationViewSnapshotImageView.frame = CGRectOffset(destinationViewSnapshotImageView.frame, 0, -(destinationViewSnapshotImageView.frame.size.height + 60.0 + offset));
sourceViewSnapshotImageView.frame = CGRectOffset(sourceViewSnapshotImageView.frame, 0, -(sourceViewSnapshotImageView.frame.size.height + 60.0 + offset));
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.25 animations:^{
CGRect frame = self.destinationView.frame;
frame.origin.y = -offset;
destinationViewSnapshotImageView.frame = frame;
} completion:^(BOOL finished) {
[self dismissViewControllerAnimated:NO completion:nil];
}];
}];
}];
}
- (UIImage *)cropImage:(UIImage *)image rect:(CGRect)rect
{
if (image.scale > 1.0f) {
rect = CGRectMake(rect.origin.x * image.scale,
rect.origin.y * image.scale,
rect.size.width * image.scale,
rect.size.height * image.scale);
}
CGImageRef imageRef = CGImageCreateWithImageInRect(image.CGImage, rect);
UIImage *result = [UIImage imageWithCGImage:imageRef scale:image.scale orientation:image.imageOrientation];
CGImageRelease(imageRef);
return result;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return YES;
}
@end
@implementation FRPChangeRootViewControllerSegue
- (void)perform
{
UIViewController *destinationViewController = (UIViewController *)self.destinationViewController;
[[UIApplication sharedApplication] delegate].window.rootViewController = destinationViewController;
if (!self.animationsDisabled) {
FRPChangeRootViewControllerSegueTransitionViewController *transitionViewController = [[FRPChangeRootViewControllerSegueTransitionViewController alloc] init];
transitionViewController.sourceView = ((UIViewController *)self.sourceViewController).view;
transitionViewController.destinationView = destinationViewController.view;
[destinationViewController presentViewController:transitionViewController animated:NO completion:^{
if ([self.sourceViewController presentingViewController]) {
[[self.sourceViewController presentingViewController] dismissViewControllerAnimated:NO
completion:NULL];
}
}];
}
}
@end