Question 1

How to implement custom view controller transitions with Motion?

Accepted Answer

Use the `motionIdentifier` property on views in both source and destination controllers, then enable transitions with `isMotionEnabled`. Add animations via the `transition` method, like `view.transition(.translate(x: -100))` for specific effects.

Question 2

Motion vs Lottie for iOS animations: which should I use?

Accepted Answer

Motion is best for programmatic, code-driven animations in UIKit, while Lottie excels at rendering pre-designed vector animations from After Effects. Choose Motion for dynamic UI transitions; Lottie for complex, static graphics.

Question 3

Can I use Motion with SwiftUI in my app?

Accepted Answer

Motion is designed for UIKit, so integration with SwiftUI requires bridging through UIViewControllerRepresentable or similar methods, adding complexity and potential performance overhead.

Question 4

How to add spring animations in Motion?

Accepted Answer

Use the `.spring` animation type in the `animate` method, such as `view.animate(.spring(damping: 0.5))` to apply spring physics. Refer to the MotionAnimation API for configuration options.

Question 5

Is Motion still actively maintained?

Accepted Answer

The README shows last version 3.1.0 and requirements for older tools, so check the GitHub repo for recent commits or issues. It may have limited updates compared to newer animation libraries.

Question 6

Motion performance on older iPhones?

Accepted Answer

Since Motion abstracts Core Animation, performance is generally good, but complex animations with many layers or transitions might cause lag on older devices. Profile with Instruments for optimization.

Question 7

How to animate CALayer properties with Motion?

Accepted Answer

Motion supports direct layer animations; use the `animate` method on CALayer instances with MotionAnimation structs, like animating border color or corner radius for advanced effects.

Motion

What is Motion?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions