A customizable animated button built with Facebook's Pop animation library. Inspired by the familiar button stack from Tinder.

• Lightweight and highly customizable
• Animations for multiple UIControlEvents
• Pure Swift 4

To run the example project, clone the repo and run the PopBounceButton-Example target.

• iOS 9.0+
• Xcode 9.0+
• Swift 4.0+

PopBounceButton is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'PopBounceButton'

1. Download and drop the PopBounceButton directory into your project.
2. Install Facebook's Pop library.

• If you found a bug, open an issue and tag as bug.
• If you have a feature request, open an issue and tag as feature.
• If you want to contribute, submit a pull request.
  • In order to submit a pull request, please fork this repo and submit a pull request from your forked repo.
  • Have a detailed message as to what your pull request fixes/enhances/adds.

1. Add a PopBounceButton to your view.

   let frame = CGRect(origin: .zero, size: CGSize(width: 100, height: 100))
   let button = PopBounceButton(frame: frame)
   view.addSubview(button)

2. Attach a target to your button to handle any events.

   button.addTarget(self, action: #selector(handleTap), for: .touchUpInside)

   @objc func handleTap(_ sender: PopBounceButton) {
       //do something
   }

Because PopBounceButton is a subclass of UIButton, it can be customized in the same way. The button's animations can be changed by modifying the following variables exposed by PopBounceButton:

var springBounciness: CGFloat = 19.0
var springSpeed: CGFloat = 10.0
var springVelocity: CGFloat = 6.0

var cancelTapScaleDuration: TimeInterval = 0.3

var longPressScaleFactor: CGFloat = 0.7
var longPressScaleDuration: TimeInterval = 0.1
var minimumPressDuration: TimeInterval = 0.2

• Pop: Facebook's iOS animation framework.

Mac Gallagher, [email protected]

PopBounceButton is available under the MIT License, see LICENSE for more infomation.