circularscroller's Introduction

CircularScroller

Efficient and Lightweight endless UIScrollView implementation in Swift

Introduction

CircularScroller is a very lightweight (less than 400LoC) and memory efficient implementation of an endless/circular UIScrollView for iOS.
It's written in pure Swift with Auto-Layout in mind.

	Features Highlights
🗜	Lightweight implementation: single source code, no dependencies, all in less than 400 lines of code.
🚀	It's efficient; it only allocates three holder pages at time and allows you to limit avoid unecessary allocations (see the doc).
🌈	Auto-Layout since the beginning.
🧬	It uses standard UIKit components at its core. No magic, just a `UIScrollView` on sterioids.
🐦	Fully made in Swift 5 from Swift ❥ lovers

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circularscroller's Issues

Great component with a few issues...

On line 318 it should be 'break' instead of 'return'
There is a flickering when scrolling from left to right because images are first removed with removeFromSuperView() and then added again with addSubview(). I solved this by inserting the subviews at index 0 and after recenterScrollOffset(), remove the subviews with an index > 0
the first time the CircularScroller shows a scrollable image it's in the wrong size on small devices -> on line 375 [let centerOffsetX = CGFloat(centerPageIndex - 1) * bounds.size.width] the bounds are incorrect. For now I fixed this by replacing self.layoutIfNeeded() with self.layoutSubviews() ...

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