#import "ViewController.h"#define IMAGE_COUNT 4@interface ViewController (){    CATransition *_transaction;    UIImageView *_image;    int _currentImage;//图片名称}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    _image=[[UIImageView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];    _image.contentMode=UIViewContentModeScaleAspectFill;//按比例填满屏幕    _image.image=[UIImage imageNamed:[NSString stringWithFormat:@"%i",_currentImage]];    [self.view addSubview:_image];        //添加手势---左划    UISwipeGestureRecognizer *left=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(leftSwipe:)];    left.direction=UISwipeGestureRecognizerDirectionLeft;//设置手势方向    [self.view addGestureRecognizer:left];//添加到屏幕上        //添加手势---右划    UISwipeGestureRecognizer *right=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(rightSwipe:)];    right.direction=UISwipeGestureRecognizerDirectionRight;    [self.view addGestureRecognizer:right];}- (void) leftSwipe : (UISwipeGestureRecognizer *) swipeGesture{    [self transitionAnimation:YES];}- (void) rightSwipe : (UISwipeGestureRecognizer *) swipeGesture{    [self transitionAnimation:NO];}- (void) transitionAnimation:(BOOL) isNext{    //1.创建动画对象    _transaction=[[CATransition alloc]init];    //2.设置动画类型，对于苹果官方没有公开的动画类型只能使用字符串    //cube  立方体翻转效果    //oglFlip 翻转效果    //suckEffect 收缩效果    //rippleEffect 水滴波纹效果    //pageCurl 向上翻页效果    //pageUnCurl  向下翻页效果    //cameralTrisHollowOpen 摄像头打开效果    //cameraIrisHollowClose 摄像头关闭效果    _transaction.type=@"rippleEffect";    if (isNext) {        _transaction.subtype=kCATransitionFromLeft;    }else{        _transaction.subtype=kCATransitionFromRight;    }    //设置动画时间    _transaction.duration=4;    //设置翻转后的图片    if (isNext) {        _currentImage=(_currentImage+1) % IMAGE_COUNT;    }else{        _currentImage=(_currentImage- 1 + IMAGE_COUNT) %IMAGE_COUNT;    }    //添加动画    _image.image=[UIImage imageNamed:[NSString stringWithFormat:@"%i",_currentImage]];    [_image.layer addAnimation:_transaction forKey:@"YC"];    }- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end