Swift Pulse Animation
12,975
This animation continually pulses from 0 to 1 opacity over 3 seconds:
let pulseAnimation = CABasicAnimation(keyPath: "opacity")
pulseAnimation.duration = 3
pulseAnimation.fromValue = 0
pulseAnimation.toValue = 1
pulseAnimation.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
pulseAnimation.autoreverses = true
pulseAnimation.repeatCount = .greatestFiniteMagnitude
self.view.layer.add(pulseAnimation, forKey: nil)
Author by
nikagar4
Updated on June 04, 2022Comments
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nikagar4 almost 2 years
i'm trying to make a pulse animation, i've found this: How to do a native "Pulse effect" animation on a UIButton - iOS and it was useful, but i need something else, so i have textfield,
UITextField
which has border, when you focus on it i want the border to change color, but in specific wayI want it to start from center and then spread, I could not find the animation so i will try to demonstrate it via text:
B = Black
,Y = Yellow
.this is the border:
BBBBBBB
border gets focused:
BBBYBBB BBYYYBB BYYYYYB YYYYYYY
animation is over, focus lost:
BYYYYYB BBYYYBB BBBYBBB BBBBBBB
my code looks something like this:
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
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TylerJames about 4 yearsThis is useful but isn't it something other than what was asked for? Or was the question modified?