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

How to blend views together

Paul Hudson    @twostraws   

Updated for Xcode 13.0

When placing one view over another, you can control the way they overlap by using the blendMode() modifier. This contains a variety of ways you can mix colors together, such as using their difference or using a color burn – these will be familiar if you’ve used Core Graphics or something like Photoshop before.

To demonstrate this we could create a ZStack with two overlapping circles inside, where the second has a .multiply blend mode so that it darkens the colors behind it:

ZStack {
    Circle()
        .fill(Color.red)
        .frame(width: 200, height: 200)
        .offset(x: -50)
        .blendMode(.screen)

    Circle()
        .fill(Color.blue)
        .frame(width: 200, height: 200)
        .offset(x: 50)
        .blendMode(.screen)
}
.frame(width: 400)

Download this as an Xcode project

Hacking with Swift is sponsored by Sentry

SPONSORED With Sentry’s error and performance monitoring for iOS you see mobile vitals that actually matter, can solve any latency issues quickly, and learn how each release is performing over time.

Get started

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

Similar solutions…

BUY OUR BOOKS
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: 4.7/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.