Animation With Spring (Bounce)

Code Example

 
 
UIView.animate(withDuration: 0.2, 
    delay: 0, 
    usingSpringWithDamping: 0.5, 
    initialSpringVelocity: 0.5, 
    options: .curveEaseOut, 
    animations: {
    // Your animation
}, completion: nil)
 

Parameters

• withDuration - How long the animation should last
• delay - How long to wait until starting the animation
• usingSpringWithDamping - Applies damping to the spring (bounce). Using 1 will completely damp out the spring so the animation just slides into place and stops. Lower the damping for more bounce (example: 0.1 - 0.9).
• initialSpringVelocity - How fast you want the initial animation to happen. Using 1 will start it fast, 0 is normal. Apple says, "You'll typically want to pass 0 for the velocity."
• options:
  • curveEaseInOut - Start slow, speed up, then slow down
  • curveEaseIn - ("In" specifies the start of the animation) Start slow, speed up, then suddenly stop
  • curveEaseOut - ("Out" specifies the end of the animation) start fast, then slow down until stop
  • curveLinear - Constant speed throughout animation

(Xcode 8, Swift 3.0)