Creating Custom UIButton Animations in Swift
Article Summary
Timotius Leonardo Lianoto from IDN Engineering tackles a common iOS pain point: UIButton animations feel lifeless compared to Android's satisfying touch feedback. His solution? A custom ripple effect that transforms user interactions.
Standard UIButton animations in UIKit are limited to basic opacity changes, which can make iOS apps feel less responsive. This tutorial walks through building a RippleButton subclass that creates Android-style ripple animations using CAShapeLayer and CABasicAnimation, complete with proper touch state management.
Key Takeaways
- Custom UIButton subclass uses CAShapeLayer with UIBezierPath for smooth ripple animations
- Three state flags (isTouching, isHolding, isRefreshing) prevent animation glitches during rapid taps
- CAAnimationDelegate handles cleanup when animation completes or user releases touch
- ClipsToBounds ensures ripple effect stays within button boundaries during expansion
- Approach enables fully customizable design system for color, size, and position
Building custom button animations with CAShapeLayer and proper state management creates polished, Android-quality touch feedback in iOS apps without third-party dependencies.
About This Article
UIButton's built-in animations only change opacity when you press and release, which doesn't feel as satisfying as the touch feedback Android users get. This limits how polished iOS apps can look.
Timotius Leonardo Lianoto built a RippleButton subclass that uses CABasicAnimation to create a ripple effect. The animation runs for 0.5 seconds with an easeInEaseOut timing function, scaling a circular CAShapeLayer from 0.1 to 1 and expanding outward from where you tap.
The ripple animation stays smooth even when you tap quickly or hold down the button. Three state flags (isTouching, isHolding, isRefreshing) prevent the animation from getting interrupted or glitching. You get polished Android-quality feedback without needing any third-party libraries.