如何在 UIButton 上制作原生“脉冲效果”动画 - iOS
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How to do a native "Pulse effect" animation on a UIButton - iOS
提问by Johann
I would like to have some kind of pulse animation (infinite loop "scale in - scale out") on a UIButton so it gets users' attention immediately.
我想在 UIButton 上有某种脉冲动画（无限循环“缩小 - 缩小”），以便立即引起用户的注意。
I saw this link How to create a pulse effect using -webkit-animation - outward ringsbut I was wondering if there was any way to do this only using native framework?
我看到了这个链接如何使用 -webkit-animation - 外环创建脉冲效果，但我想知道是否有任何方法可以仅使用本机框架来做到这一点？
回答by beryllium
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
迅速
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")
回答by Ravi Sharma
Here is the swift code for it ;)
这是它的快速代码;)
let pulseAnimation:CABasicAnimation = CABasicAnimation(keyPath: "transform.scale")
pulseAnimation.duration = 1.0
pulseAnimation.toValue = NSNumber(value: 1.0)
pulseAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
pulseAnimation.autoreverses = true
pulseAnimation.repeatCount = .greatestFiniteMagnitude
self.view.layer.add(pulseAnimation, forKey: nil)
回答by Bassebus
The swift code is missing a fromValue, I had to add it in order to get it working.
swift 代码缺少一个fromValue，我必须添加它才能使其正常工作。
pulseAnimation.fromValue = NSNumber(float: 0.0)
Also forKeyshould be set, otherwise removeAnimationdoesn't work.
也forKey应该设置，否则removeAnimation不起作用。
self.view.layer.addAnimation(pulseAnimation, forKey: "layerAnimation")
回答by Ahmad ELkhwaga
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)
}
