Problems rotating view - ios

I want to animate a UIImageView. The image should only spin clockwise. When the image is spinning, I want to speed it up. When I do speed it up, it goes counterclockwise and the start position is not correct as well. This is my code:
func rotateAnimation(theView: UIView, duration: CFTimeInterval = 2.0, repeatCount: Float = 1, toValue: CGFloat = CGFloat(.pi * 2.0), linear: Bool = false, animation: String = "transform.rotation") {
let rotateAnimation = CABasicAnimation(keyPath: animation)
let currentLayer = (theView.layer.presentation())
var currentAngle = CFloat((currentLayer?.value(forKeyPath: "transform.rotation") as? NSNumber)!)
currentAngle = roundf(currentAngle * 180 / Float(Double.pi))
print(currentAngle)
rotateAnimation.fromValue = currentAngle
if !linear{
rotateAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
}
rotateAnimation.toValue = toValue
rotateAnimation.duration = duration
rotateAnimation.repeatCount = repeatCount
theView.layer.add(rotateAnimation, forKey: nil)
}
The print shows me to correct angle.
I am calling this method below twice. The second time I am calling it, the image is spinning counterclock:
rotateAnimation(theView: star, duration: 15.0, repeatCount: Float.infinity, toValue: CGFloat(Double.pi * 2), linear: true)
delay(delay: 3.5, closure: {
self.rotateAnimation(theView: self.star, duration: 7, repeatCount: Float.infinity, toValue: CGFloat(Double.pi * 2), linear: true)
})

Related

Swift: Pause an animation that is moving along a path?

I have an animation of a bubble, like so:
func bubblePoint(_ value: CGFloat, midX: CGFloat) -> CGPoint {
let startY: CGFloat = UIScreen.main.bounds.height
let endY: CGFloat = -100
let rangeX: CGFloat = UIScreen.main.bounds.width * 0.1
let y = startY + (endY - startY) * value
let x = sin(value * 4 * .pi) * rangeX * (0.1 + value * 0.9) + midX * UIScreen.main.bounds.width
let point = CGPoint(x: x, y: y)
return point
}
func bubblePath(midX: CGFloat) -> UIBezierPath {
let path = UIBezierPath()
path.move(to: bubblePoint(0, midX: midX))
for value in stride(from: CGFloat(0.01), through: 1, by: 0.01) {
path.addLine(to: bubblePoint(value, midX: midX))
}
return path
}
func createAnimation(midX: CGFloat, duration: CFTimeInterval) -> CAKeyframeAnimation {
let animation = CAKeyframeAnimation(keyPath: "position")
animation.path = bubblePath(midX: midX).cgPath
animation.duration = duration
animation.repeatCount = Float.infinity
return animation
}
func createBubble(midX: CGFloat, duration: CFTimeInterval) -> (UIImageView, CAKeyframeAnimation) {
return (
view: UIImageView().then {
$0.image = image
},
animation: createAnimation(midX: midX, duration: duration)
)
}
let bubbles = createBubble(midX: 100, duration: 11, )
bubble.layer.add(animation, forKey: nil)
I want to pause the bubble when the user goes to another screen (and then resume the animation when the user comes back). I have looked into a solution like this, but I would have no idea how to do this with an animation that uses a path like mine. Is it practical to do this?

There are two main ways to pause (freeze) an animation. One is to set the layer speed to zero. The other is to wrap the animation in a UIViewPropertyAnimator and pause the animator (you can do this even with a keyframe animation).
Notice, however, that when "user goes to another screen" the animation may be removed entirely. You may thus need to store info about where in the animation we were and start from there when your view controller comes back on screen.

Swift 4 Rotation Jumps Back

I'm rotating a the minute pointer on my watch icon, but at the end of the animation, it jumps back to the starting position. How can I have it stay where it stopped?
let rotation: CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
rotation.toValue = Double.pi
rotation.duration = 0.5 // or however long you want ...
rotation.isCumulative = true
watchIconMin.layer.add(rotation, forKey: "rotationAnimation")

Use UIView animation if watchIconMin is a subclass or class of UIView.
UIView.animate(withDuration: 0.5, animations: {
self.watchIconMin.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
}) { (success) in
self.watchIconMin.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
}

How to shake the text field in swift 4? [duplicate]

I am trying to figure out how to make the text Field shake on button press when the user leaves the text field blank.
I currently have the following code working:
if self.subTotalAmountData.text == "" {
let alertController = UIAlertController(title: "Title", message:
"What is the Sub-Total!", preferredStyle: UIAlertControllerStyle.Alert)
alertController.addAction(UIAlertAction(title: "Okay", style: UIAlertActionStyle.Default,handler: nil))
self.presentViewController(alertController, animated: true, completion: nil)
} else {
}
But i think it would be much more appealing to just have the text field shake as an alert.
I can't find anything to animate the text field.
Any ideas?
Thanks!

You can change the duration and repeatCount and tweak it. This is what I use in my code. Varying the fromValue and toValue will vary the distance moved in the shake.
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 4
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: viewToShake.center.x - 10, y: viewToShake.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: viewToShake.center.x + 10, y: viewToShake.center.y))
viewToShake.layer.add(animation, forKey: "position")

The following function is used in any view.
extension UIView {
func shake() {
let animation = CAKeyframeAnimation(keyPath: "transform.translation.x")
animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
animation.duration = 0.6
animation.values = [-20.0, 20.0, -20.0, 20.0, -10.0, 10.0, -5.0, 5.0, 0.0 ]
layer.add(animation, forKey: "shake")
}
}

EDIT: using CABasicAnimation cause the app to crash if you ever trigger the animation twice in a row. So be sure to use CAKeyframeAnimation. Bug has been fixed, thanks to the comments :)
Or you can use this if you want more parameters (in swift 5) :
public extension UIView {
func shake(count : Float = 4,for duration : TimeInterval = 0.5,withTranslation translation : Float = 5) {
let animation = CAKeyframeAnimation(keyPath: "transform.translation.x")
animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
animation.repeatCount = count
animation.duration = duration/TimeInterval(animation.repeatCount)
animation.autoreverses = true
animation.values = [translation, -translation]
layer.add(animation, forKey: "shake")
}
}
You can call this function on any UIView, UIButton, UILabel, UITextView etc. This way
yourView.shake()
Or this way if you want to add some custom parameters to the animation:
yourView.shake(count: 5, for: 1.5, withTranslation: 10)

I think all of these are dangerous.
If your shake animation is based on a user action and that user action is triggered while animating.
CRAAAAAASH
Here is my way in Swift 4:
static func shake(view: UIView, for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
view.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
view.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.startAnimation()
}
Maybe not the cleanest, but this method can be triggered repeatedly and is easily understood
Edit:
I am a huge proponent for usage of UIViewPropertyAnimator. So many cool features that allow you to make dynamic modifications to basic animations.
Here is another example to add a red border while the view is shaking, then removing it when the shake finishes.
static func shake(view: UIView, for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
view.layer.borderColor = UIColor.red.cgColor
view.layer.borderWidth = 1
view.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
view.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.addCompletion { (_) in
view.layer.borderWidth = 0
}
propertyAnimator.startAnimation()
}

Swift 5.0
extension UIView {
func shake(){
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x - 10, y: self.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: self.center.x + 10, y: self.center.y))
self.layer.add(animation, forKey: "position")
}
}
To use
self.vwOffer.shake()

Swift 5
Safe (non crash) shake extension for Corey Pett answer:
extension UIView {
func shake(for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
self.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.startAnimation()
}
}

extension CALayer {
func shake(duration: NSTimeInterval = NSTimeInterval(0.5)) {
let animationKey = "shake"
removeAnimationForKey(animationKey)
let kAnimation = CAKeyframeAnimation(keyPath: "transform.translation.x")
kAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
kAnimation.duration = duration
var needOffset = CGRectGetWidth(frame) * 0.15,
values = [CGFloat]()
let minOffset = needOffset * 0.1
repeat {
values.append(-needOffset)
values.append(needOffset)
needOffset *= 0.5
} while needOffset > minOffset
values.append(0)
kAnimation.values = values
addAnimation(kAnimation, forKey: animationKey)
}
}
How to use:
[UIView, UILabel, UITextField, UIButton & etc].layer.shake(NSTimeInterval(0.7))

I tried some of the available solutions but none of them were handling the full shake animation: moving from left to right and get back to the original position.
So, after some investigation I found the right solution that I consider to be a successful shake using UIViewPropertyAnimator.
func shake(completion: (() -> Void)? = nil) {
let speed = 0.75
let time = 1.0 * speed - 0.15
let timeFactor = CGFloat(time / 4)
let animationDelays = [timeFactor, timeFactor * 2, timeFactor * 3]
let shakeAnimator = UIViewPropertyAnimator(duration: time, dampingRatio: 0.3)
// left, right, left, center
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 20, y: 0)
})
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: -20, y: 0)
}, delayFactor: animationDelays[0])
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 20, y: 0)
}, delayFactor: animationDelays[1])
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: animationDelays[2])
shakeAnimator.startAnimation()
shakeAnimator.addCompletion { _ in
completion?()
}
shakeAnimator.startAnimation()
}
Final result:

func shakeTextField(textField: UITextField)
{
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: textField.center.x - 10, y: textField.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: textField.center.x + 10, y: textField.center.y))
textField.layer.add(animation, forKey: "position")
textField.attributedPlaceholder = NSAttributedString(string: textField.placeholder ?? "",
attributes: [NSAttributedStringKey.foregroundColor: UIColor.red])
}
//write in base class or any view controller and use it

This is based on CABasicAnimation, it contain also an audio effect :
extension UIView{
var audioPlayer = AVAudioPlayer()
func vibrate(){
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.05
animation.repeatCount = 5
animation.autoreverses = true
animation.fromValue = NSValue(CGPoint: CGPointMake(self.center.x - 5.0, self.center.y))
animation.toValue = NSValue(CGPoint: CGPointMake(self.center.x + 5.0, self.center.y))
self.layer.addAnimation(animation, forKey: "position")
// audio part
do {
audioPlayer = try AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(mySoundFileName, ofType: "mp3")!))
audioPlayer.prepareToPlay()
audioPlayer.play()
} catch {
print("∙ Error playing vibrate sound..")
}
}
}

func addShakeAnimation(duration: CGFloat = 0.3, repeatCount: Float = 4, angle: Float = Float.pi / 27, completion: (() -> Void)? = nil) {
let rotationAnimation = CABasicAnimation.init(keyPath: "transform.rotation.z")
rotationAnimation.duration = TimeInterval(duration/CGFloat(repeatCount))
rotationAnimation.repeatCount = repeatCount
rotationAnimation.autoreverses = true
rotationAnimation.fromValue = -angle
rotationAnimation.toValue = angle
rotationAnimation.isRemovedOnCompletion = true
CATransaction.begin()
CATransaction.setCompletionBlock {
if let completion = completion {
completion()
}
}
layer.add(rotationAnimation, forKey: "shakeAnimation")
CATransaction.commit()
}

How to control animation rotation direction in Swift past 180º?

According to the documentation for rotated(by:):
angle
The angle, in radians, by which to rotate the affine transform. In iOS, a positive value specifies counterclockwise rotation and a negative value specifies clockwise rotation.
This has caused much confusion and has been partly answered, but even if we accept that the coordinate system is flipped (and just do the opposite of what the documentation says), it still provides inconsistent results when animating.
The direction of rotation -- clockwise or counterclockwise -- depends on the proximity of the target rotation to the current rotation:
<= 180º animates clockwise
> 180º animates counter-clockwise
Using UIView.animate or UIViewPropertyAnimator shows the inconsistency:
// Animates CLOCKWISE
UIView.animate(withDuration: 2.0) {
let radians = Angle(179).radians // 3.12413936106985
view.transform = view.transform.rotated(by: CGFloat(radians))
}
// Animates COUNTER-CLOCKWISE
UIViewPropertyAnimator(duration: 2, curve: .linear) {
let radians = Angle(181).radians // 3.15904594610974
view.transform = view.transform.rotated(by: CGFloat(radians))
}
// Does not animate
UIViewPropertyAnimator(duration: 2, curve: .linear) {
let radians = Angle(360).radians // 6.28318530717959
view.transform = view.transform.rotated(by: CGFloat(radians))
}

Try this:
let multiplier: Double = isSelected ? 1 : -2
let angle = CGFloat(multiplier * Double.pi)
UIView.animate(withDuration: 0.4) {
self.indicatorImageView.transform = CGAffineTransform(rotationAngle: angle)
}

The answer is to use CABasicAnimation for rotations past 180º, keeping in mind that positive values are clockwise and negative values are counterclockwise.
// Rotate 360º clockwise.
let rotate = CABasicAnimation(keyPath: "transform.rotation")
rotate.fromValue = Angle(0).radians
rotate.toValue = Angle(360).radians
rotate.duration = 2.0
self.layer.add(rotate, forKey: "transform.rotation")

if sender.isSelected {
/// clockwise
let rotate = CABasicAnimation(keyPath: "transform.rotation")
rotate.fromValue = 0
rotate.toValue = CGFloat.pi
rotate.duration = 0.25
rotate.fillMode = CAMediaTimingFillMode.forwards
rotate.isRemovedOnCompletion = false
self.arrowButton.layer.add(rotate, forKey: "transform.rotation")
} else {
/// anticlockwise
let rotate = CABasicAnimation(keyPath: "transform.rotation")
rotate.fromValue = CGFloat.pi
rotate.toValue = 0
rotate.duration = 0.25
rotate.fillMode = CAMediaTimingFillMode.forwards
rotate.isRemovedOnCompletion = false
self.arrowButton.layer.add(rotate, forKey: "transform.rotation")
}

The third option allows you to rotate over 180º in the desired direction:
// #1 This rotates 90º clockwise
UIView.animate(withDuration: 0.25, animations:{
view.transform = CGAffineTransform(rotationAngle: -CGFloat.pi/2)
})
// #2 This rotates 90º counter clockwise back to #1
UIView.animate(withDuration: 0.25, animations:{
view.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
})
// #3 This rotates 270º clockwise back to #1
UIView.animate(withDuration: 0.1875, animations:{
view.transform = CGAffineTransform(rotationAngle: CGFloat.pi/2)
}, completion: { _ in
UIView.animate(withDuration: 0.0625, animations:{
view.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
})
})

Shake Animation for UITextField/UIView in Swift

I am trying to figure out how to make the text Field shake on button press when the user leaves the text field blank.
I currently have the following code working:
if self.subTotalAmountData.text == "" {
let alertController = UIAlertController(title: "Title", message:
"What is the Sub-Total!", preferredStyle: UIAlertControllerStyle.Alert)
alertController.addAction(UIAlertAction(title: "Okay", style: UIAlertActionStyle.Default,handler: nil))
self.presentViewController(alertController, animated: true, completion: nil)
} else {
}
But i think it would be much more appealing to just have the text field shake as an alert.
I can't find anything to animate the text field.
Any ideas?
Thanks!

You can change the duration and repeatCount and tweak it. This is what I use in my code. Varying the fromValue and toValue will vary the distance moved in the shake.
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 4
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: viewToShake.center.x - 10, y: viewToShake.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: viewToShake.center.x + 10, y: viewToShake.center.y))
viewToShake.layer.add(animation, forKey: "position")

The following function is used in any view.
extension UIView {
func shake() {
let animation = CAKeyframeAnimation(keyPath: "transform.translation.x")
animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
animation.duration = 0.6
animation.values = [-20.0, 20.0, -20.0, 20.0, -10.0, 10.0, -5.0, 5.0, 0.0 ]
layer.add(animation, forKey: "shake")
}
}

EDIT: using CABasicAnimation cause the app to crash if you ever trigger the animation twice in a row. So be sure to use CAKeyframeAnimation. Bug has been fixed, thanks to the comments :)
Or you can use this if you want more parameters (in swift 5) :
public extension UIView {
func shake(count : Float = 4,for duration : TimeInterval = 0.5,withTranslation translation : Float = 5) {
let animation = CAKeyframeAnimation(keyPath: "transform.translation.x")
animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
animation.repeatCount = count
animation.duration = duration/TimeInterval(animation.repeatCount)
animation.autoreverses = true
animation.values = [translation, -translation]
layer.add(animation, forKey: "shake")
}
}
You can call this function on any UIView, UIButton, UILabel, UITextView etc. This way
yourView.shake()
Or this way if you want to add some custom parameters to the animation:
yourView.shake(count: 5, for: 1.5, withTranslation: 10)

I think all of these are dangerous.
If your shake animation is based on a user action and that user action is triggered while animating.
CRAAAAAASH
Here is my way in Swift 4:
static func shake(view: UIView, for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
view.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
view.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.startAnimation()
}
Maybe not the cleanest, but this method can be triggered repeatedly and is easily understood
Edit:
I am a huge proponent for usage of UIViewPropertyAnimator. So many cool features that allow you to make dynamic modifications to basic animations.
Here is another example to add a red border while the view is shaking, then removing it when the shake finishes.
static func shake(view: UIView, for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
view.layer.borderColor = UIColor.red.cgColor
view.layer.borderWidth = 1
view.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
view.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.addCompletion { (_) in
view.layer.borderWidth = 0
}
propertyAnimator.startAnimation()
}

Swift 5.0
extension UIView {
func shake(){
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x - 10, y: self.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: self.center.x + 10, y: self.center.y))
self.layer.add(animation, forKey: "position")
}
}
To use
self.vwOffer.shake()

Swift 5
Safe (non crash) shake extension for Corey Pett answer:
extension UIView {
func shake(for duration: TimeInterval = 0.5, withTranslation translation: CGFloat = 10) {
let propertyAnimator = UIViewPropertyAnimator(duration: duration, dampingRatio: 0.3) {
self.transform = CGAffineTransform(translationX: translation, y: 0)
}
propertyAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: 0.2)
propertyAnimator.startAnimation()
}
}

extension CALayer {
func shake(duration: NSTimeInterval = NSTimeInterval(0.5)) {
let animationKey = "shake"
removeAnimationForKey(animationKey)
let kAnimation = CAKeyframeAnimation(keyPath: "transform.translation.x")
kAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
kAnimation.duration = duration
var needOffset = CGRectGetWidth(frame) * 0.15,
values = [CGFloat]()
let minOffset = needOffset * 0.1
repeat {
values.append(-needOffset)
values.append(needOffset)
needOffset *= 0.5
} while needOffset > minOffset
values.append(0)
kAnimation.values = values
addAnimation(kAnimation, forKey: animationKey)
}
}
How to use:
[UIView, UILabel, UITextField, UIButton & etc].layer.shake(NSTimeInterval(0.7))

I tried some of the available solutions but none of them were handling the full shake animation: moving from left to right and get back to the original position.
So, after some investigation I found the right solution that I consider to be a successful shake using UIViewPropertyAnimator.
func shake(completion: (() -> Void)? = nil) {
let speed = 0.75
let time = 1.0 * speed - 0.15
let timeFactor = CGFloat(time / 4)
let animationDelays = [timeFactor, timeFactor * 2, timeFactor * 3]
let shakeAnimator = UIViewPropertyAnimator(duration: time, dampingRatio: 0.3)
// left, right, left, center
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 20, y: 0)
})
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: -20, y: 0)
}, delayFactor: animationDelays[0])
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 20, y: 0)
}, delayFactor: animationDelays[1])
shakeAnimator.addAnimations({
self.transform = CGAffineTransform(translationX: 0, y: 0)
}, delayFactor: animationDelays[2])
shakeAnimator.startAnimation()
shakeAnimator.addCompletion { _ in
completion?()
}
shakeAnimator.startAnimation()
}
Final result:

func shakeTextField(textField: UITextField)
{
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: textField.center.x - 10, y: textField.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: textField.center.x + 10, y: textField.center.y))
textField.layer.add(animation, forKey: "position")
textField.attributedPlaceholder = NSAttributedString(string: textField.placeholder ?? "",
attributes: [NSAttributedStringKey.foregroundColor: UIColor.red])
}
//write in base class or any view controller and use it

This is based on CABasicAnimation, it contain also an audio effect :
extension UIView{
var audioPlayer = AVAudioPlayer()
func vibrate(){
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.05
animation.repeatCount = 5
animation.autoreverses = true
animation.fromValue = NSValue(CGPoint: CGPointMake(self.center.x - 5.0, self.center.y))
animation.toValue = NSValue(CGPoint: CGPointMake(self.center.x + 5.0, self.center.y))
self.layer.addAnimation(animation, forKey: "position")
// audio part
do {
audioPlayer = try AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(mySoundFileName, ofType: "mp3")!))
audioPlayer.prepareToPlay()
audioPlayer.play()
} catch {
print("∙ Error playing vibrate sound..")
}
}
}

func addShakeAnimation(duration: CGFloat = 0.3, repeatCount: Float = 4, angle: Float = Float.pi / 27, completion: (() -> Void)? = nil) {
let rotationAnimation = CABasicAnimation.init(keyPath: "transform.rotation.z")
rotationAnimation.duration = TimeInterval(duration/CGFloat(repeatCount))
rotationAnimation.repeatCount = repeatCount
rotationAnimation.autoreverses = true
rotationAnimation.fromValue = -angle
rotationAnimation.toValue = angle
rotationAnimation.isRemovedOnCompletion = true
CATransaction.begin()
CATransaction.setCompletionBlock {
if let completion = completion {
completion()
}
}
layer.add(rotationAnimation, forKey: "shakeAnimation")
CATransaction.commit()
}

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