How to animate layer shadowOpacity?

Question

I have a view on which I\'ve set the layerOpacity to 1.

    theView.layer.shadowOpacity = 1.0;

This looks fine when the view is farther down th

Answer 1

The below code work for me

1)Add QuartzCore frame work 2)Import QuartzCore frame work

Add the following Code in the required place

UIImageView * glowimageview = [[[UIImageView alloc]init]autorelease];
    [glowimageview setFrame:CGRectMake(500,400,200,200)];
    [glowimageview setImage:[UIImage imageNamed:@"144.png"]];
    [sender addSubview:glowimageview];

    glowimageview.layer.shadowColor = [UIColor redColor].CGColor;
    glowimageview.layer.shadowRadius = 10.0f;
    glowimageview.layer.shadowOpacity = 1.0f;
    glowimageview.layer.shadowOffset = CGSizeZero;

    CABasicAnimation *shadowAnimation = [CABasicAnimation animationWithKeyPath:@"shadowOpacity"];
    shadowAnimation.duration=1.0;
    shadowAnimation.repeatCount=HUGE_VALF;
    shadowAnimation.autoreverses=YES;
    shadowAnimation.fromValue = [NSNumber numberWithFloat:1.0];
    shadowAnimation.toValue = [NSNumber numberWithFloat:0.0];
    [glowimageview.layer addAnimation:shadowAnimation forKey:@"shadowOpacity"];

It will works. Change the format of the code as per your requirement