IOS第18天(8,核心动画转场动画）

***翻页效果

#import "HMViewController.h"

@interface HMViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@property (nonatomic, assign) int index;

@end

@implementation HMViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    _index = ;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    _index++;

    if (_index == ) {
        _index = ;
    }
    NSString *fileName = [NSString stringWithFormat:@"%d",_index];
    _imageView.image = [UIImage imageNamed:fileName];

    CATransition *anim = [CATransition animation];

    anim.type = @"pageCurl";

    anim.subtype = kCATransitionFromLeft;
//    anim.startProgress = 0.5;

    anim.duration = ;

    [_imageView.layer addAnimation:anim forKey:nil];
}

@end