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