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#import "CZViewController.h"

@interface CZViewController ()

@property ( nonatomic , strong ) UIView *myView;

@end

@implementation CZViewController

- ( 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 ];

}

// 点击屏幕时调用

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

{

    [ self positionAnim1 ];

}

#pragma mark - 关键帧动画

/** 摇晃动画 */

- ( void )shake

{

    if ([ self . myView . layer animationForKey : @"shake" ]) return ;

   

    CAKeyframeAnimation *anim = [ CAKeyframeAnimation animationWithKeyPath : @"transform.rotation" ];

   

    anim. values = @[@( - M_PI / 36) , @( M_PI / 36) , @( - M_PI / 36)] ;

//    anim.duration = 0.5f;

    anim. repeatCount = MAXFLOAT ;

   

    [ self . myView . layer addAnimation :anim forKey : @"shake" ];

}

// 图层在指定的路径上运动

- ( void )positionAnim1

{

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

    // 绘制圆形路径

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

    // 持续时间

    anim. duration = 2.0f ;

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

}

// 在指定的几个点上运动

- ( void )positionAnim

{

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

   

    NSValue *p1 = [ NSValue valueWithCGPoint : CGPointMake ( 50 , 50 )];

    NSValue *p2 = [ NSValue valueWithCGPoint : CGPointMake ( 50 , 300 )];

    NSValue *p3 = [ NSValue valueWithCGPoint : CGPointMake ( 250 , 300 )];

    NSValue *p4 = [ NSValue valueWithCGPoint : CGPointMake ( 250 , 50 )];

    NSValue *p5 = [ NSValue valueWithCGPoint : CGPointMake ( 50 , 50 )];

    anim. values = @[ p1, p2, p3, p4, p5 ] ;

    // 图层会保持显示动画执行后的状态

    // 设置保存动画的最新状态

    anim. fillMode = kCAFillModeForwards ;

    // 设置动画执行完毕之后不删除动画

    anim. removedOnCompletion = NO ;

   

    anim. duration = 2.0f ;

   

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

}

@end

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