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@interface CZViewController ()

@property ( nonatomic , strong ) UIView *myView;

@end

@implementation CZViewController

/**

  动画组：一组动画同时执行

 

  动画是调出来的！

 */

- ( UIView *)myView

{

    if ( _myView == nil ) {

        _myView = [[ UIView alloc ] initWithFrame : CGRectMake ( 110 , 100 , 100 , 100 )];

        _myView . backgroundColor = [ UIColor redColor ];

       

        [ self . view addSubview : _myView ];

    }

    return _myView ;

}

- ( void )viewDidLoad

{

    [ super viewDidLoad ];

    [ self myView ];

}

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

{

    [ self groupAnim ];

}

#pragma mark - 动画组

- ( void )groupAnim

{

    CAAnimationGroup *group = [[ CAAnimationGroup alloc ] init ];

   

    // 向动画组中添加动画

    // 路径动画

    CAKeyframeAnimation *anim1 = [ CAKeyframeAnimation animationWithKeyPath : @"position" ];

    anim1. path = [ UIBezierPath bezierPathWithOvalInRect : CGRectMake ( 60 , 100 , 200 , 200 )]. CGPath ;

   

    // 旋转动画

    CABasicAnimation *anim2 = [ CABasicAnimation animationWithKeyPath : @"transform.rotation" ];

    anim2. toValue = @( M_PI * 10) ;

   

    // 缩放动画

    CABasicAnimation *anim3 = [ CABasicAnimation animationWithKeyPath : @"transform.scale" ];

    anim3. fromValue = @(1.0f) ;

    anim3. toValue = @(0.1f) ;

   

    group. animations = @[ anim1, anim2, anim3 ] ;

   

    // 动画时长，一组动画整体完成的时间

    group. duration = 2.0f ;

    [ self . myView . layer addAnimation :group forKey : nil ];

}

@end

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