xcode 迅捷脉冲动画
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Swift Pulse Animation
提问by nikagar4
i'm trying to make a pulse animation, i've found this:
ios - how to do a native "Pulse effect" animation on a UIButtonand it was useful, but i need something else,
so i have textfield, UITextFieldwhich has border,
when you focus on it i want the border to change color, but in specific way
i want it to start from center and then spread, i could not find the animation so i will try to demonstrate it by text:B = Black
Y = Yellow.
this is border:
我正在尝试制作一个脉冲动画，我发现了这个：
ios - 如何在 UIButton 上做一个原生的“脉冲效果”动画，它很有用，但我需要别的东西，所以我有文本UITextField框，它有边框，当你专注于它时，我希望边框改变颜色，但在特定方式中我希望它从中心开始然后展开，我找不到动画所以我会尝试通过文本来演示它：B = Black Y =黄色。这是边界：
BBBBBBB
BBBBBB
border gets focused:
边框变得聚焦：
BBBYBBB
BBBYBBB
BBYYYBB
BBYYYBB
BYYYYYB
BYYYYYB
YYYYYYY
YYYYYY
animation is over, focuse lost:
动画结束，焦点丢失：
BYYYYYB
BYYYYYB
BBYYYBB
BBYYYBB
BBBYBBB
BBBYBBB
BBBBBBB
BBBBBB
my code looks something like this:
我的代码看起来像这样：
let pulseAnimation = CABasicAnimation(keyPath: "borderColor")
pulseAnimation.duration = 3
pulseAnimation.fromValue = UIColor.darkGrayColor().CGColor
pulseAnimation.toValue = UIColor.yellowColor().CGColor
pulseAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEasInEaseOut)
pulseAnimation.autoreverses = true
//pulseAnimation.repeatCount = FLT_MAX
x.layer.sublayers![0].addAnimation(pulseAnimation, forKey: nil)
it works but i need it to do something else
它有效，但我需要它做其他事情
回答by BilalReffas
Here you go
干得好
let pulseAnimation = CABasicAnimation(keyPath: "opacity")
pulseAnimation.duration = 30
pulseAnimation.fromValue = 0
pulseAnimation.toValue = 1
pulseAnimation.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
pulseAnimation.autoreverses = true
pulseAnimation.repeatCount =.greatestFiniteMagnitude
self.view.layer.add(pulseAnimation, forKey: nil)
