AHKBendableView
A UIView subclass that bends its edges during position change animations, creating a fluid visual effect.
What is AHKBendableView?
AHKBendableView is a custom iOS UIView subclass that bends its edges when its position or size changes during animations. It solves the problem of creating fluid, visually engaging interface feedback by dynamically adjusting a CAShapeLayer's path to simulate bending while keeping subviews intact.
iOS developers building apps with custom animations and visual effects, particularly those wanting to add subtle physics-based feedback to view transitions.
Developers choose AHKBendableView for its simple API that adds sophisticated bending effects with minimal code, independent control over bending parameters, and seamless integration with standard UIView animations.
Overview
UIView subclass that bends its edges when its position changes.
Use Cases
Best For
- Adding subtle physics-based feedback to modal transitions
- Creating fluid action sheet animations like Skype's interface
- Enhancing view movement animations with edge deformation effects
- Building custom alert dialogs with unique visual feedback
- Implementing draggable UI elements with bending visual cues
- Adding playful animation effects to onboarding screens
Not Ideal For
- Apps built with SwiftUI requiring native animation effects without UIKit dependencies
- Performance-critical applications like games or heavy UI lists where animation overhead must be minimal
- Teams wanting drop-in animated components with pre-built interactions and gestures
Pros & Cons
Pros
Uses CAShapeLayer to dynamically adjust the view's path during animations, creating a unique bending effect as demonstrated in the demo GIF and blog posts.
Offers damping and initialSpringVelocity properties to fine-tune bending independently from the main animation, with example code showing how to set them for optimal effect.
Keeps subviews intact while the background layer bends, ensuring content stability during animations, as highlighted in the README's description.
With only three public properties and compatibility with standard UIView animations, it's easy to add bending effects with minimal code, as shown in the usage example.
Cons
Designed solely for UIKit and not natively compatible with SwiftUI, making it less suitable for modern iOS projects adopting declarative UI frameworks.
Dynamic CAShapeLayer path manipulation during animations can add computational cost, potentially affecting performance on older devices or in complex scenes.
Last updated in 2014 with no recent activity, it may not be optimized for recent iOS versions or Swift updates, risking compatibility issues.
Frequently Asked Questions
Related Projects
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AdvancePhysics-based animations for iOS, tvOS, and macOS.
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