UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning

#import "ModelAnimationDelegate.h"
#import <UIKit/UIKit.h>
#import "MapVC.h"
#import "MapLiuLanViewController.h"
#import "MapCollectionViewCell.h"

@interface ModelAnimationDelegate ()<UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning>

@property (nonatomic, assign) BOOL isPresentAnimationing;

@end

@implementation ModelAnimationDelegate

//  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
    MapLiuLanViewController *destinationVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    NSIndexPath *indexPath = destinationVC.indexPath;
    
    // 获取来源vc
    UINavigationController *naVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    MapVC *sourceVC = (MapVC *)naVC.topViewController;
    // 获取来源view
    UICollectionView *collectionView = sourceVC.collectionView;
    MapCollectionViewCell *selectedCell = (MapCollectionViewCell *)[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.imgView.image;
    animationImgView.contentMode = UIViewContentModeScaleAspectFill;
    animationImgView.clipsToBounds = YES;
    [containerView addSubview:animationImgView];
    
    // 获取动画结束位置大小
    CGFloat w = WIDTH;
    CGFloat h = w / animationImgView.image.size.width * animationImgView.image.size.height;
    CGFloat x = 0;
    CGFloat y = (HEIGHT - h) / 2.0;
    CGRect endFrame = CGRectMake(x, y, w, h);
        
    // 执行过渡动画
    [UIView animateWithDuration:1.0 animations:^{
        animationImgView.frame = endFrame;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
        [UIView animateWithDuration:0.5 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];
    
    // 获取目标vc
    MapLiuLanViewController *destinationVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    NSIndexPath *indexPath = destinationVC.indexPath;
    
    // 获取来源vc
    UINavigationController *naVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    MapVC *sourceVC = (MapVC *)naVC.topViewController;
    // 获取来源view
    UICollectionView *collectionView = sourceVC.collectionView;
    MapCollectionViewCell *selectedCell = (MapCollectionViewCell *)[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.imgView.image;
    animationImgView.contentMode = UIViewContentModeScaleAspectFill;
    animationImgView.clipsToBounds = YES;
    [containerView addSubview:animationImgView];
    
    // 获取动画结束位置大小
    CGFloat w = WIDTH;
    CGFloat h = w / animationImgView.image.size.width * animationImgView.image.size.height;
    CGFloat x = 0;
    CGFloat y = (HEIGHT - h) / 2.0;
    CGRect endFrame = CGRectMake(x, y, w, h);
    
    // 执行过渡动画
    [UIView animateWithDuration:1.0 animations:^{
        animationImgView.frame = endFrame;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
        [UIView animateWithDuration:0.5 animations:^{
            destinationView.alpha = 1.0;
        } completion:^(BOOL finished) {
            [animationImgView removeFromSuperview];
        }];
    }];
}

#pragma mark ----- UIViewControllerTransitioningDelegate协议方法 -----

- (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;
}


#pragma mark ----- UIViewControllerAnimatedTransitioning协议方法 -----

- (NSTimeInterval)transitionDuration:(nullable id <UIViewControllerContextTransitioning>)transitionContext {
    return 1.0;
}

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext {
    _isPresentAnimationing ? [self presentViewAnimation:transitionContext] : [self dismissViewAnimation:transitionContext];
}

@end