Welcome! This article will teach you about a key topic in iOS: layers. You probably already know about views in iOS, but you might not know that every single view is backed by something called layer. Layers are part of the Core Animation framework. You may be wondering, “What’s the point? I never used a layer before so it might not be that important.” Whether you know it or not, your app uses laye
![A Beginner's Guide to CALayer](https://cdn-ak-scissors.b.st-hatena.com/image/square/755d9ba9ee5811be015abaec4c550d5c93a070d7/height=288;version=1;width=512/https%3A%2F%2Fwww.appcoda.com%2Fcontent%2Fimages%2Fwordpress%2F2016%2F08%2Fcalayer-featured.jpg)