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")