#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imageV;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

}

static int _i = ;

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

    //转场代码与转场动画必须得在同一个方法当中.

    //转场代码

//    _i++;

//    if (_i == 4) {

//        _i = 1;

//    }

//

//    NSString *imageName = [NSString stringWithFormat:@"%d",_i];

//    self.imageV.image = [UIImage imageNamed:imageName];

//

//

//    //添加转场动画

//    CATransition *anim = [CATransition animation];

//    anim.duration  = 1;

//    //设置转场的类型

//    anim.type = @"pageCurl";

//

//    //设置动画的起始位置

//    anim.startProgress = 0.3;

//    //设置动画的结束位置

//    anim.endProgress = 0.5;

//

//

//

//    [self.imageV.layer addAnimation:anim forKey:nil];

//    

    [UIView transitionWithView:self.imageV duration:0.5 options:UIViewAnimationOptionTransitionCurlUp animations:^{

        //转场 代码

        _i++;

        if (_i == ) {

            _i = ;

        }

        NSString *imageName = [NSString stringWithFormat:@"%d",_i];

        self.imageV.image = [UIImage imageNamed:imageName];

    } completion:^(BOOL finished) {

    }];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end