OC转场动画UIViewControllerTransitioningDelegate

该项目一共两个界面，第一个的只有一个SystemAnimationViewController只有UICollecitonView，第二个界面ImgDetailViewController只有一个UIImageView，代码简单，这里不做陈述

下面是转场动画的所有代码：

//

//  ModelAnimationDelegate.m

//  Demo

//

//  Created by Apple on 2018/11/8.

//  Copyright © 2018年 cqytjr. All rights reserved.

//

#import "ModelAnimationDelegate.h"

#import "SystemAnimationViewController.h"

#import "SystemAnimaitonCollectionViewCell.h"

#import "ImgDetailViewController.h"

/*

 1.描述ViewController转场的：

 UIViewControllerTransitioningDelegate自定义模态转场动画时使用

 ,UINavigationControllerDelegate  自定义navigation转场动画时使用。,

 UITabBarControllerDelegate  自定义tab转场动画时使用。

 2.定义动画内容的

 UIViewControllerAnimatedTransitioning,UIViewControllerInteractiveTransitioning

 3.表示动画上下文的

 UIViewControllerContextTransitioning

 */

@interface ModelAnimationDelegate ()< UIViewControllerAnimatedTransitioning,UIViewControllerTransitioningDelegate>

 @property (nonatomic, assign) BOOL isPresentAnimationing;

@end

@implementation ModelAnimationDelegate

#pragma mark UIViewControllerAnimatedTransitioning

//  视图弹出

- (void)presentViewAnimation:(id <UIViewControllerContextTransitioning>)transitionContext {

    // 获取容器view

    UIView *containerView = [transitionContext containerView];

    // 获取目标view

    UIView *destinationView = [transitionContext viewForKey:UITransitionContextToViewKey];

    destinationView.alpha = 0;

    // 将目标view添加到容器view

    [containerView addSubview:destinationView];

    // 获取目标vc

    ImgDetailViewController *destinationVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

    NSIndexPath *indexPath = destinationVC.indexPath;

    // 获取来源vc

    UINavigationController *naVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

    SystemAnimationViewController *sourceVC = (SystemAnimationViewController *)naVC.topViewController;

    // 获取来源view

    UICollectionView *collectionView = sourceVC.collectionView;

    SystemAnimaitonCollectionViewCell *selectedCell = (SystemAnimaitonCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];

    // 获取动画开始位置大小

    CGRect startFrame = [collectionView convertRect:selectedCell.frame toView:[UIApplication sharedApplication].keyWindow];

    UIImageView *animationImgView = [[UIImageView alloc] initWithFrame:startFrame];

    animationImgView.image = selectedCell.img.image;

    animationImgView.contentMode = UIViewContentModeScaleAspectFit;

    animationImgView.clipsToBounds = YES;

    [containerView addSubview:animationImgView];

    // 获取动画结束位置大小

    CGRect endFrame = destinationVC.img.frame;

    // 执行过渡动画

    [UIView animateWithDuration:1.0 animations:^{

        animationImgView.frame = endFrame;

        NSLog(@"-----:%f   %f   %f   %f",startFrame.origin.x,startFrame.origin.y,startFrame.size.width,startFrame.size.height);

        NSLog(@"-----:%f   %f   %f   %f",endFrame.origin.x,endFrame.origin.y,endFrame.size.width,endFrame.size.height);

    } completion:^(BOOL finished) {

        [transitionContext completeTransition:YES];

        [UIView animateWithDuration:1.0 animations:^{

            destinationView.alpha = 1.0;

        } completion:^(BOOL finished) {

            [animationImgView removeFromSuperview];

        }];

    }];

}

//  视图消失

- (void)dismissViewAnimation:(id <UIViewControllerContextTransitioning>)transitionContext {

    // 获取容器view

    UIView *containerView = [transitionContext containerView];

    // 获取目标view

    UIView *destinationView = [transitionContext viewForKey:UITransitionContextToViewKey];

    destinationView.alpha = 0;

    // 将目标view添加到容器view

    [containerView addSubview:destinationView];

    UINavigationController *naVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

    // 获取目标vc

    SystemAnimationViewController *destinationVC = naVC.topViewController;

    //         NSIndexPath *indexPath = destinationVC.indexPath;

    //

    // 获取来源vc

    ImgDetailViewController *sourceVC = (ImgDetailViewController *)[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

    NSIndexPath *indexPath = sourceVC.indexPath;

    // 获取来源view

    UICollectionView *collectionView = destinationVC.collectionView;

    SystemAnimaitonCollectionViewCell *selectedCell = (SystemAnimaitonCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];

    // 获取动画开始位置大小

    CGRect startFrame = sourceVC.img.frame;

    UIImageView *animationImgView = [[UIImageView alloc] initWithFrame:startFrame];

    animationImgView.image = selectedCell.img.image;

    animationImgView.contentMode = UIViewContentModeScaleAspectFill;

    animationImgView.clipsToBounds = YES;

    [containerView addSubview:animationImgView];

    animationImgView.contentMode = UIViewContentModeScaleAspectFit;

    animationImgView.clipsToBounds = YES;

    // 获取动画结束位置大小

    CGRect endFrame =  [collectionView convertRect:selectedCell.frame toView:[UIApplication sharedApplication].keyWindow];

    // 执行过渡动画

    [UIView animateWithDuration:1.0 animations:^{

        animationImgView.frame = endFrame;

        NSLog(@"-----:%f   %f   %f   %f",startFrame.origin.x,startFrame.origin.y,startFrame.size.width,startFrame.size.height);

        NSLog(@"-----:%f   %f   %f   %f",endFrame.origin.x,endFrame.origin.y,endFrame.size.width,endFrame.size.height);

        sourceVC.view.hidden = YES;

    } completion:^(BOOL finished) {

        [transitionContext completeTransition:YES];

    }];

    [UIView animateWithDuration:1.0 animations:^{

        destinationView.alpha = 1.0;

    } completion:^(BOOL finished) {

        [animationImgView removeFromSuperview];

    }];

}

- (NSTimeInterval)transitionDuration:(nullable id <UIViewControllerContextTransitioning>)transitionContext {

    return 10.0;

}

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext {

    _isPresentAnimationing ?  [self presentViewAnimation:transitionContext] : [self dismissViewAnimation:transitionContext];

}

#pragma mark UIViewControllerTransitioningDelegate

- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {

    _isPresentAnimationing = YES;

    return self;

}

- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {

    _isPresentAnimationing = NO;

    return self;

}

@end