I'm trying to make UIAlert shake when the textfield in the alert is empty, I use this textfield to add items to my array, and with the code I've used it doesn't add any empty values to my list but nor stay on UIAlertAction, so obviously the shaking animation doesn't show too, this is my code:
let action = UIAlertAction(title: "Add Item", style: .default) { (action) in
if textField.text?.isEmpty ?? true {
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 4
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")
} else {
self.itemArray.append(textField.text!)
self.tableView.reloadData()
}
}
Two things here, first just to help you here i'm adding a extension to shake functionality:
extension UIView {
func shake(duration timeDuration: Double = 0.07, repeat countRepeat: Float = 3){
let animation = CABasicAnimation(keyPath: "position")
animation.duration = timeDuration
animation.repeatCount = countRepeat
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")
}
}
So for you to use can be easy like, "your view".shake() it's more simple.
Second and most important is, you can't use this, or even the way that you were trying, because UITextField inherit from UIControl, and need to be from UIView, so the adjust for you is, just put your UITextFiel inside a UIView and add the shake functionality to the UIView and them will shake everything inside :D
If like up vote :D :D
I'm trying to create an animation where when the user drags a UIView then release it, the UIView return to it's initial position. Problems is, I have CAShapeLayer connected to that UIView that I want to stay connected while the UIView return to it's place. CAShapeLayer uses CABasicAnimation and the UIView uses UIView.animate.
How can I get the same timing between the two if I want the same EaseOut deceleration? Right now both animation are way off...
let destinations = self.myAspectDestination[self.viewToDrag.accessibilityIdentifier!] ?? []
for destination in destinations {
if let link: CAShapeLayer = self.myAspects["\(self.viewToDrag.accessibilityIdentifier!):\(destination)"] {
let newPath = UIBezierPath()
newPath.move(to: (self.myPlanets[destination]?.center)!)
newPath.addLine(to: self.originalLocation)
let animation = CABasicAnimation(keyPath: "path")
animation.duration = 1
animation.isRemovedOnCompletion = true
animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
animation.fillMode = kCAFillModeBoth // keep to value after finishing
animation.fromValue = link.path
animation.toValue = newPath.cgPath
animation.timingFunction = CAMediaTimingFunction(name: "easeInEaseOut")
link.path = newPath.cgPath
link.add(animation, forKey: animation.keyPath)
}
}
UIView.animate(withDuration: 1, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIViewAnimationOptions.curveEaseOut, animations: {
self.viewToDrag.center = self.originalLocation
}) { (result) in
self.viewToDrag = nil
}
I've been using the following UIView extension to shake a view:
func shake(count: Float = 4, for duration: TimeInterval = 0.5,
withTranslation translation: CGFloat = 5) {
let animation: CABasicAnimation = CABasicAnimation(keyPath: "transform.translation.x")
animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
animation.repeatCount = count
animation.duration = duration / TimeInterval(animation.repeatCount)
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: -translation, y: self.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: translation, y: self.center.y))
layer.add(animation, forKey: "shake")
}
And the usage:
view.shake(count: 3, for: 0.2, withTranslation: 8)
This works well for shaking a view (in my case I'm shaking some buttons, UIView's, and a few image views).
The problem arises when I try clicking on one of the views during the shake animation.
I receive a:
Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[NSConcreteValue doubleValue]:
unrecognized selector sent to instance 0x600000442640'
In the case of the buttons, if I disable the button then initiate the shake animation it seems to prevent the error from occurring.
Unfortunately, this does not seems to work for the image views and UIViews.
I also disabled user interaction on the image views / UIView's to no avail.
I feel like this has something to do with the wrong coordinate being passed to the lower layers during a hit test check while the view is being animated.
Any insight into this error would be greatly appreciated.
You can try this code. It should be helpful:
extension UIView {
func shakeByX() {
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x - 6, y: self.center.y))
animation.toValue = NSValue(cgPoint: CGPoint(x: self.center.x + 6, y: self.center.y))
self.layer.add(animation, forKey: "position")
}
func shakeByY() {
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.07
animation.repeatCount = 3
animation.autoreverses = true
animation.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x, y: self.center.y - 6))
animation.toValue = NSValue(cgPoint: CGPoint(x: self.center.x, y: self.center.y + 6))
self.layer.add(animation, forKey: "position")
}
}
I'm trying to implement two consecutive transformation animations. When the first animation ends, the second animation is called through the completion handler. Because this is a transformation animation, my issue is that when the first animation finishes, the layer resizes back to the original size, and then the second animation begins. I'd like for the second animation to begin with the new layer size after the first transformation animation. This post Objective-C - CABasicAnimation applying changes after animation? says I have to resize/transform the layer before beginning the first animation, so that when the first animation ends, the layer is actually the new size. I've tried to do that by changing the bounds or actually applying the transform to the layer but its still not working.
override func viewDidAppear(_ animated: Bool) {
buildBar()
}
func buildBar(){
progressBar1.bounds = CGRect(x: 0, y: 0, width: 20, height: 5)
progressBar1.position = CGPoint(x: 0, y: 600)
progressBar1.backgroundColor = UIColor.white.cgColor
view.layer.addSublayer(progressBar1)
extendBar1()
}
func extendBar1(){
CATransaction.begin()
let transform1 = CATransform3DMakeScale(10, 1, 1)
let anim = CABasicAnimation(keyPath: "transform")
// self.progressBar1.bounds = CGRect(x: 0, y: 0, width: 200, height: 5)
// self.progressBar1.transform = transform1
anim.isRemovedOnCompletion = false
anim.fillMode = kCAFillModeForwards
anim.toValue = NSValue(caTransform3D:transform1)
anim.duration = 5.00
CATransaction.setCompletionBlock {
self.extendBar2()
}
progressBar1.add(anim, forKey: "transform")
CATransaction.commit()
}
func extendBar2(){
let transform1 = CATransform3DMakeScale(2, 1, 1)
let anim = CABasicAnimation(keyPath: "transform")
anim.isRemovedOnCompletion = false
anim.fillMode = kCAFillModeForwards
anim.toValue = NSValue(caTransform3D:transform1)
anim.duration = 5.00
progressBar1.add(anim, forKey: "transform")
}
Because you are modifying the transform property of the layer in both animation, it will be easier here to use CAKeyframeAnimation, which will handle the chaining of the animations for you.
func extendBar(){
let transform1 = CATransform3DMakeScale(10, 1, 1)
let transform2 = CATransform3DMakeScale(2, 1, 1)
let anim = CAKeyframeAnimation()
anim.keyPath = "transform"
anim.values = [progressBar1.transform, transform1, transform2] // the stages of the animation
anim.keyTimes = [0, 0.5, 1] // when they occurs, 0 being the very begining, 1 the end
anim.duration = 10.00
progressBar1.add(anim, forKey: "transform")
progressBar1.transform = transform2 // we set the transform property to the final animation's value
}
A word about the content of values and keyTimes:
We set the first value to be the current transform of progressBar1. This will make sure we start in the current layer's state.
In keyTimes, we say that at the begining, the first value in the values array should be used. We then say at animation's half time, the layer should be transformed in values second value. Hence, the animation between the initial state and the second one will occurs during that time. Then, between 0.5 to 1, we'll go from tranform1 to transform2.
You can read more about animations in this very nice article from objc.io.
If you really need two distinct animations (because maybe you want to add subviews to progressBar1 in between, here's the code that will do it
func extendBar1() {
CATransaction.begin()
CATransaction.setCompletionBlock {
print("side effects")
extendBar2()
}
let transform1 = CATransform3DMakeScale(5, 1, 1)
let anim = CABasicAnimation(keyPath: "transform")
anim.fromValue = progressBar1.transform
anim.toValue = transform1
anim.duration = 2.00
progressBar1.add(anim, forKey: "transform")
CATransaction.setDisableActions(true)
progressBar1.transform = transform1
CATransaction.commit()
}
func extendBar2() {
CATransaction.begin()
let transform2 = CATransform3DMakeScale(2, 1, 1)
let anim = CABasicAnimation(keyPath: "transform")
anim.fromValue = progressBar1.transform
anim.toValue = transform2
anim.duration = 2.00
progressBar1.add(anim, forKey: "transform")
CATransaction.setDisableActions(true)
progressBar1.transform = transform2
CATransaction.commit()
}
What happens here? Basically, we setup a first "normal animation". So we create the animation, that will modify the presentation layer and set the actual layer to the final first animation's transform.
Then, when the first animation completes, we call extendBar2 which will in turn queue a normal animation.
You also want to call CATransaction.setDisableActions(true) before explicitly updating the transform, otherwise, core animation will create an implicit one, which will override the one created just before.
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()
}