IOS第18天(9,核心动画-动画组）

****动画组

// 核心动画都是假象，不能改变layer的真实属性的值
// 展示的位置和实际的位置不同。实际位置永远在最开始位置

#import "HMViewController.h"

@interface HMViewController ()
@property (weak, nonatomic) IBOutlet UIView *redView;

@end

@implementation HMViewController

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

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

    CABasicAnimation *rotation = [CABasicAnimation animation];

    rotation.keyPath = @"transform.rotation";

    rotation.toValue = @M_PI_2;

    CABasicAnimation *position = [CABasicAnimation animation];

    position.keyPath = @"position";

    position.toValue = [NSValue valueWithCGPoint:CGPointMake(, )];
    CABasicAnimation *scale = [CABasicAnimation animation];
    scale.keyPath = @"transform.scale";
    scale.toValue = @0.5;
    CAAnimationGroup *group = [CAAnimationGroup animation];

    group.animations = @[rotation,position,scale];

    group.duration = ;

    // 取消反弹
    group.removedOnCompletion = NO;
    group.fillMode = kCAFillModeForwards;

    [_redView.layer addAnimation:group forKey:nil];
}

@end