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CALayers: A Guide For Swift
CALayers: A guide
Before we start
This is an easy guide, intended to go into detail about CALayers and even something about the performance of the same.
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Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.2, and Swift 5.3
Keywords and Terminology
CALayer: A layer manages images and allows you to perform animations on those images
CAShapeLayer: A layer that draws a cubic Bezier spline in its coordinate space
CATextLayer: A layer that provides simple text layout and rendering of plain or attributed strings
UIView: An object that manages the content for a rectangular area on the screen
The Repo
I’ve prepared a Repo which should help you follow along with this article!
The Theory
Within a view, a backing layer is used to process bitmap information about those views. Therefore UIView instances have a root CALayer, and a programmer can add further layers to a particular UIView instance and these are actually sublayers of the root…
