#pragma mark 点击事件
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
    UITouch *touch = touches.anyObject;
    CGPoint location = [touch locationInView:self.view];
    
    /**
     创建弹性动画
     damping：阻尼，范围0-1，阻尼月接近于0，弹性效果越明显
     velocity: 弹性复位的速度
     */
    
    [UIView animateWithDuration:5.0 delay:0 usingSpringWithDamping:0.1 initialSpringVelocity:1.0 options:UIViewAnimationOptionCurveLinear animations:^{
        _imageView.center = location;
    } completion:nil];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
//    UITouch *touch = touches.anyObject;
//    CGPoint location = [touch locationInView:self.view];
    
    /**
     关键帧动画
     options:
     delay:延期
     */
    
    [UIView animateKeyframesWithDuration:0.5 delay:0 options:UIViewKeyframeAnimationOptionCalculationModeCubicPaced animations:^{
        
        //第二个关键帧（准确的说第一个关键帧是开始位置）：从0秒开始持续50%的时间，也就是5.0*0.5=2.5秒
        [UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.5 animations:^{
            _imageView.center = CGPointMake(80.0, 220.0);
        }];
        
        //第三个关键帧，从0.5*5.0秒开始，持续5.0*0.25=1.25秒
        [UIView addKeyframeWithRelativeStartTime:0.5 relativeDuration:0.25 animations:^{
            _imageView.center = CGPointMake(45.0, 300);
        }];
        
        //第四个关键帧：从0.75*5.0秒开始，持所需5.0*0.25=1.25秒
        [UIView addKeyframeWithRelativeStartTime:0.75 relativeDuration:0.25 animations:^{
            _imageView.center = CGPointMake(55.0, 400.0);
        }];
        
    } completion:^(BOOL finished) {
        NSLog(@"动画结束");
    }];
}

#import "ViewController.h"

#define IMAGE_COUNT 5

@interface ViewController () {
    UIImageView *_imageVeiw;
    int _currentIndex;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //定义图片控件
    _imageVeiw = [[UIImageView alloc] init];
    _imageVeiw.frame = CGRectMake(0, 60, self.view.frame.size.width, self.view.frame.size.height-120);
    
    _imageVeiw.contentMode = UIViewContentModeScaleAspectFit;
    _imageVeiw.image = [UIImage imageNamed:@"0"];
    [self.view addSubview:_imageVeiw];
    
    //添加手势
    UISwipeGestureRecognizer *leftSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipe:)];
    leftSwipeGesture.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.view addGestureRecognizer:leftSwipeGesture];
    
    UISwipeGestureRecognizer *rightSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipe:)];
    rightSwipeGesture.direction = UISwipeGestureRecognizerDirectionRight;
    [self.view addGestureRecognizer:rightSwipeGesture];
    
}

#pragma mark 向左划
- (void)leftSwipe:(UISwipeGestureRecognizer *)gesture {
    [self transitionAnimation:YES];
}

#pragma mark 向右划
- (void)rightSwipe:(UISwipeGestureRecognizer *)gesture {
    [self transitionAnimation:NO];
}

#pragma mark 转场动画
- (void)transitionAnimation:(BOOL)isNext {
    
    UIViewAnimationOptions option;
    if (isNext) {
        option = UIViewAnimationOptionCurveLinear|UIViewAnimationOptionTransitionFlipFromBottom;
    } else {
        option = UIViewAnimationOptionCurveLinear|UIViewAnimationOptionTransitionFlipFromLeft;
    }
    
    [UIView transitionWithView:_imageVeiw duration:1.0 options:option animations:^{
        _imageVeiw.image = [self getImage:isNext];
    } completion:nil];
    
}

#pragma mark 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 = [NSString stringWithFormat:@"%d",_currentIndex];
    
    return [UIImage imageNamed:imageName];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

+ (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^)(BOOL finished))completion NS_AVAILABLE_IOS(4_0)