1、CATransition介绍：

2、简单使用：

2-1、在storyboard中搭建界面：

2-2、实现转场动画：

1.#import "ViewController.h"
2.
3.@interface ViewController ()
4.@property (weak, nonatomic) IBOutlet UIImageView *imageView;
5.
6./** 图片索引 */
7.@property (assign, nonatomic) NSInteger index;
8.@end
9.
10.@implementation ViewController
11.
12.- (void)viewDidLoad {
13.    [super viewDidLoad];
14.    self.imageView.image = [UIImage imageNamed:@"girl1"];
15.
16.}
17.
18.- (IBAction)next {
19.    self.index++;
20.    if (self.index == 9) {
21.        self.index = 0;
22.    }
23.    NSString *imageName = [NSString stringWithFormat:@"girl%zd", self.index + 1];
24.    self.imageView.image = [UIImage imageNamed:imageName];
25.
26.    // 1. 创建动画
27.    CATransition *anim = [CATransition animation];
28.
29.//    anim.type = kCATransitionMoveIn;
30.    anim.type = @"cube";
31.
32.    anim.duration = 1.0;
33.
34.    // 2. 添加动画
35.    [self.imageView.layer addAnimation:anim forKey:nil];
36.}
37.
38.- (IBAction)forward {
39.    self.index--;
40.    if (self.index == -1) {
41.        self.index = 8;
42.    }
43.    NSString *imageName = [NSString stringWithFormat:@"girl%zd", self.index + 1];
44.    self.imageView.image = [UIImage imageNamed:imageName];
45.
46.    // 1. 创建动画
47.    CATransition *anim = [CATransition animation];
48.
49.    //    anim.type = kCATransitionMoveIn;
50.    anim.type = @"cube";
51.    anim.subtype = kCATransitionFromLeft;
52.    anim.duration = 1.0;
53.
54.    // 2. 添加动画
55.    [self.imageView.layer addAnimation:anim forKey:nil];
56.}
57.@end

效果示例图：