iconView.backgroundColor = [UIColor greenColor];
self.iconView = iconView;
// 设置为圆角图片
self.iconView.layer.cornerRadius = self.iconView.frame.size.width * 0.5;
self.iconView.clipsToBounds = YES;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
// UIView自带的转场动画
[UIView transitionWithView:self.iconView duration:1.0 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{ /** 执行左翻转动画，*/
// 从左边翻转 ， 之前设置显示图片1，翻转后显示图2 -》图片1 左翻转到最后显示图片2
self.iconView.image = [UIImage imageNamed:@"2"];
} completion:^(BOOL finished) {
NSLog(@"completion");
/** 左翻转动画 结束后， 停 1 秒后，再执行 右翻转动画 */
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ // 停 1 秒后，再执行 右翻转动画
[UIView transitionWithView:self.iconView duration:1.0 options:UIViewAnimationOptionTransitionFlipFromRight animations:^{ // 然后，从右边翻转，翻转时显示图片1 -》图片2 右翻转最后显示图片1
self.iconView.image = [UIImage imageNamed:@"1"];
} completion:nil];
});
}];
}
@end
3、视图间转场动画：使用UIView自带双视图间的转场动画函数实现
复制代码
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
/**< imageView1 */
@property (nonatomic, strong) UIView *view1;
/**< imageView2 */
@property (nonatomic, strong) UIView *view2;
@end
@implementation ViewController
- (void)viewDidLoad{
[super viewDidLoad];
self.view.backgroundColor = [UIColor blackColor];
// 1. scrollView 添加 view2 子控件
UIView *view2 = [[UIView alloc] init];
view2.backgroundColor = [UIColor greenColor];
