NumberMorphView
A Swift iOS view for displaying numbers with smooth animated transitions using number tweening/morphing.
What is NumberMorphView?
NumberMorphView is an iOS library that provides a custom UIView for displaying numbers with animated transitions between digits. It solves the problem of creating visually appealing number changes in apps, such as counters, timers, or score displays, by implementing number tweening/morphing techniques.
iOS developers building apps that require animated numeric displays, such as fitness trackers, finance apps, games, or any interface with dynamic numbers.
Developers choose NumberMorphView for its simplicity, smooth animations out-of-the-box, and flexibility to customize interpolation and duration, avoiding the need to manually implement complex animation logic.
Overview
A label view for displaying numbers which can transition or animate using a technique called number tweening or number morphing.
Use Cases
Best For
- Animating score counters in games
- Creating smooth transitions in financial or data dashboard apps
- Building fitness trackers with animated metrics
- Implementing countdown timers with visual flair
- Enhancing numeric displays in educational or utility apps
- Adding polished animations to iOS UI components
Not Ideal For
- Apps requiring animations for non-numeric text or formatted strings like currency or dates
- Projects built with SwiftUI that prioritize native declarative UI over UIKit components
- Teams needing high-performance animations for rapidly changing numbers in real-time data streams
- Developers using modern Swift versions (Swift 5+) without legacy support, as it targets Swift 2.2
Pros & Cons
Pros
Implements number tweening for fluid transitions between digits, as shown in the sample GIF with seamless animations from one digit to another.
Offers multiple built-in interpolators like Spring and Bounce, and allows custom ones via InterpolatorProtocol, enabling varied animation styles without manual keyframing.
Can be dragged into storyboards and configured with IBOutlet, simplifying visual design workflows for iOS developers.
Works with or without Auto Layout using intrinsic content size, making it adaptable to different coding approaches, as demonstrated in the code examples.
Cons
Targets Swift 2.2, which is obsolete and may require significant migration efforts or cause compatibility issues with modern iOS projects using Swift 5+.
The README is brief and lacks examples for advanced scenarios, such as animating multi-digit numbers or handling edge cases like negative values or decimals.
Adds a CocoaPods dependency for a single-purpose component, which might be excessive for apps with minimal animation needs or those avoiding third-party libraries.
Frequently Asked Questions
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