- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    UIView  *view =[[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];

    view.backgroundColor =[UIColor redColor];

    [self.view addSubview:view];

    [self heartbeatView:view duration:100];

}

-(void)heartbeatView:(UIView *)view duration:(CGFloat)fDuration

{

    [[self class] heartbeatView:view duration:fDuration maxSize:1.4f durationPerBeat:0.5f];

}

+(void)heartbeatView:(UIView *)view duration:(CGFloat)fDuration maxSize:(CGFloat)fMaxSize durationPerBeat:(CGFloat)fDurationPerBeat

{

    if (view && (fDurationPerBeat > 0.1f))

    {

        CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];

        

        CATransform3D scale1 = CATransform3DMakeScale(0.8, 0.8, 1);

        CATransform3D scale2 = CATransform3DMakeScale(fMaxSize, fMaxSize, 1);

        CATransform3D scale3 = CATransform3DMakeScale(fMaxSize - 0.3f, fMaxSize - 0.3f, 1);

        CATransform3D scale4 = CATransform3DMakeScale(1.0, 1.0, 1);

        

        NSArray *frameValues = [NSArray arrayWithObjects:

                                [NSValue valueWithCATransform3D:scale1],

                                [NSValue valueWithCATransform3D:scale2],

                                [NSValue valueWithCATransform3D:scale3],

                                [NSValue valueWithCATransform3D:scale4],

                                nil];

        

        [animation setValues:frameValues];

        

        NSArray *frameTimes = [NSArray arrayWithObjects:

                               [NSNumber numberWithFloat:0.05],

                               [NSNumber numberWithFloat:0.2],

                               [NSNumber numberWithFloat:0.6],

                               [NSNumber numberWithFloat:1.0],

                               nil];

        [animation setKeyTimes:frameTimes];

        

        animation.fillMode = kCAFillModeForwards;

        animation.duration = fDurationPerBeat;

        animation.repeatCount = fDuration/fDurationPerBeat;

        

        [view.layer addAnimation:animation forKey:@"heartbeatView"];

    }else{}

}