iOS转场动画CATransition

#define IMAGE_COUNT 5

@interface PictureViewController ()

{

    UIImageView *_imageView;

    int _currentIndex;

}

@property (nonatomic,strong)NSArray * imageArr;

@property (nonatomic,strong)NSArray * animationImage;

@end

@implementation PictureViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    self.view.backgroundColor=[UIColorwhiteColor];

    // Do any additional setup after loading the view.

    

    //定义图片控件

    _imageView=[[UIImageViewalloc]init];

    _imageView.frame=CGRectMake(10,0, self.view.frame.size.width-20,self.view.frame.size.height);

    _imageView.contentMode=UIViewContentModeScaleAspectFit;

    _imageView.image=[UIImageimageNamed:self.imageArr[0]];//默认图片

    [self.viewaddSubview:_imageView];

    //添加手势

    UISwipeGestureRecognizer *leftSwipeGesture=[[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(leftSwipe:)];

    leftSwipeGesture.direction=UISwipeGestureRecognizerDirectionLeft;

    [self.viewaddGestureRecognizer:leftSwipeGesture];

    

    UISwipeGestureRecognizer *rightSwipeGesture=[[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(rightSwipe:)];

    rightSwipeGesture.direction=UISwipeGestureRecognizerDirectionRight;

    [self.viewaddGestureRecognizer:rightSwipeGesture];

}

// 向左滑动浏览下一张图片

-(void)leftSwipe:(UISwipeGestureRecognizer *)gesture{

    [selftransitionAnimation:YES];

}

// 向右滑动浏览上一张图片

-(void)rightSwipe:(UISwipeGestureRecognizer *)gesture{

    [selftransitionAnimation:NO];

}

//转场动画

-(void)transitionAnimation:(BOOL)isNext{

    //1.创建转场动画对象

    CATransition *transition=[[CATransitionalloc]init];

    //2.设置动画类型,注意对于苹果官方没公开的动画类型只能使用字符串，并没有对应的常量定义

    transition.type=self.animationImage[arc4random()%12];

    //设置子类型

    if (isNext) {

        transition.subtype=kCATransitionFromRight;

    }else{

        transition.subtype=kCATransitionFromLeft;

    }

    //设置动画时常

    transition.duration=0.5f;

    //3.设置转场后的新视图添加转场动画

    _imageView.image=[selfgetImage:isNext];

    

    //key任意值，用来存储动画对象

    [_imageView.layeraddAnimation:transition forKey:@"myAnimation"];

    

}

// 取得当前图片

-(UIImage *)getImage:(BOOL)isNext{

    if (isNext) {

        _currentIndex=(_currentIndex+1)%IMAGE_COUNT;

    }else{

        _currentIndex=(_currentIndex-1+IMAGE_COUNT)%IMAGE_COUNT;

    }

    NSString *imageName=[NSStringstringWithFormat:@"%@",self.imageArr[_currentIndex]];

    return [UIImageimageNamed:imageName];

}

//懒加载

-(NSArray *)imageArr

{

    

    if (!_imageArr) {

        //图片

       _imageArr=@[@"0.jpg",@"1.jpg",@"2.jpg",@"3.jpg",@"4.jpg"];

    }

    return_imageArr;

}

-(NSArray *)animationImage

{

    

    if (!_animationImage) {

        //动画效果

        //@"交叉淡化过度",@"新视图把旧视图推出去",@"新视图移到旧视图上面",@"将旧视图移开，显示下面的新视图",@"立方体翻滚效果",@"上下左右翻转效果",@"收缩效果，如一块布被抽走",@"水滴效果",@"向上翻页效果",@"向下翻页效果",@"相机镜头打开效果",@"相机镜头关闭效果"

        _animationImage=@[@"fade",@"push",@"moveIn",@"reveal",@"cube",@"oglFlip",@"suckEffect",@"rippleEffect",@"pageCurl",@"pageUnCurl",@"cameraIrisHollowOpen",@"cameraIrisHollowClose"];

    }

    return_animationImage;

}

@end