如何在 UIButton-iOS 上做一个本地的“脉冲效应”动画

小开

最佳答案

CABasicAnimation *theAnimation;


theAnimation=[CABasicAnimation animationWithKeyPath:@"opacity"];
theAnimation.duration=1.0;
theAnimation.repeatCount=HUGE_VALF;
theAnimation.autoreverses=YES;
theAnimation.fromValue=[NSNumber numberWithFloat:1.0];
theAnimation.toValue=[NSNumber numberWithFloat:0.0];
[theLayer addAnimation:theAnimation forKey:@"animateOpacity"]; //myButton.layer instead of

Swift

let pulseAnimation = CABasicAnimation(keyPath: #keyPath(CALayer.opacity))
pulseAnimation.duration = 1
pulseAnimation.fromValue = 0
pulseAnimation.toValue = 1
pulseAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
pulseAnimation.autoreverses = true
pulseAnimation.repeatCount = .greatestFiniteMagnitude
view.layer.add(pulseAnimation, forKey: "animateOpacity")

See the article "Animating Layer Content"

小开

Here is the swift code for it ;)

let pulseAnimation = CABasicAnimation(keyPath: "transform.scale")
pulseAnimation.duration = 1.0
pulseAnimation.fromValue = NSNumber(value: 0.0)
pulseAnimation.toValue = NSNumber(value: 1.0)
pulseAnimation.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
pulseAnimation.autoreverses = true
pulseAnimation.repeatCount = .greatestFiniteMagnitude
self.view.layer.add(pulseAnimation, forKey: nil)

小开

The swift code is missing a fromValue, I had to add it in order to get it working.

pulseAnimation.fromValue = NSNumber(value: 0.0)

Also forKey should be set, otherwise removeAnimation doesn't work.

self.view.layer.addAnimation(pulseAnimation, forKey: "layerAnimation")

小开

func animationScaleEffect(view:UIView,animationTime:Float)
{
UIView.animateWithDuration(NSTimeInterval(animationTime), animations: {


view.transform = CGAffineTransformMakeScale(0.6, 0.6)


},completion:{completion in
UIView.animateWithDuration(NSTimeInterval(animationTime), animations: { () -> Void in


view.transform = CGAffineTransformMakeScale(1, 1)
})
})


}




@IBOutlet weak var perform: UIButton!


@IBAction func prefo(sender: AnyObject) {
self.animationScaleEffect(perform, animationTime: 0.7)
}