FREE TRIAL: Accelerate your app development career with Hacking with Swift+! >>

Drawing: Introduction

Paul Hudson    @twostraws   

In this technique project we’re going to take a close look at drawing in SwiftUI, including creating custom paths and shapes, animating your changes, solving performance problems, and more – it’s a really big topic, and deserves close attention.

Behind the scenes, SwiftUI uses the same drawing system that we have on the rest of Apple’s frameworks: Core Animation and Metal. Most of the time Core Animation is responsible for our drawing, whether that’s custom paths and shapes or UI elements such as TextField, but when things really get complex we can move down to Metal – Apple’s low-level framework that’s optimized for complex drawing. One of the neat features of SwiftUI is that these two are almost interchangeable: we can move from Core Animation to Metal with one small change.

Anyway, we have lots to cover so please create a new App project called Drawing and let’s dive in…

Hacking with Swift is sponsored by Essential Developer

SPONSORED Join a FREE crash course for iOS devs who want to become complete senior developers — from October 18th to 24th. Learn how to apply iOS app architecture patterns through a series of lectures and practical coding sessions.

Learn more

Sponsor Hacking with Swift and reach the world's largest Swift community!

Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.6/5

Unknown user

You are not logged in

Log in or create account

Link copied to your pasteboard.