Kristaps Grinbergs

In previous articles, we discussed how to [get started](/graphql-ios-swift/) with and use [subscriptions](/graphql-subscriptions/) with GraphQL in iOS (and iPadOS, tvOS, and macOS) using Swift programming language.

GraphQL main functionality is to fetch and update data from the server.

Apple [PassKit](https://developer.apple.com/documentation/passkit) framework is responsible for Apple Pay and managing user passes in Wallet app.

I am an Apple fanboy and I admit that.

GraphQL is an alternative to the commonly used REST API approach.

Websockets in iOS 13, macOS 10.15, tvOS 13, watchOS 6 and Mac Catalyst have gained first-class citizen status in networking stack.

This year I finally had a chance to attend [WWDC](https://developer.apple.com/wwdc19/) (Apple Worldwide Developers Conference).

Here's something useful to know - [UIView’s](https://developer.apple.com/documentation/uikit/uiview) are backed by [CALayer’s](https://developer.apple.com/documentation/quartzcore/calayer).

Animation has been an important part of the Mac OS X user interface since the very beginning.

Animating a UIBezierPath drawing is a pretty trivial task.

WebSockets allow for extremely fast two-way networking communication, which lets you send and receive updates quicker and more often, not to mention securely.