How to used a named UIColor in code and Interface Builder
Swift version: 5.1
Since Xcode 9.0 we’ve been able to create named colors directly inside asset catalogs, which means it’s possible to select a precise color once then use it uniformly across all code and storyboards.
To try this out, open your asset catalog, click the + button, then choose New Color Set from the menu that appears. Select the new color that got created – it will be a large white square – then press Alt+Cmd+4 to activate the attributes inspector so that you can customize it.
Named colors are comprised of two rather obvious parts: a name (e.g. “PayPal blue”) and a color, which you can specify as ranges from 0-1, ranges from 0-255, or hexadecimal.
Once a named color is in place you can use it code like this:
myView.backgroundColor = UIColor(named: "Chartreuse")You can also use it inside storyboards by selecting it from the color dropdown menu – all your named colors will automatically be shown in their own section of the menu.
SPONSORED Instabug helps you identify and resolve severe crashes quickly. You can retrace in-app events and know exactly which line of code caused the crash along with environment details, network logs, repro steps, and the session profiler. Ask more questions or keep users up-to-date with in-app replies straight from your dashboard. Instabug takes data privacy seriously, so no one sees your data but you! See more detailed features comparison and try Instabug's crash reporting SDK for free.
Available from iOS 11.0
Similar solutions…
- How to create live playgrounds in Xcode
- SwiftUI tips and tricks
- How to use Instruments to profile your SwiftUI code and identify slow layouts
- SwiftUI vs Interface Builder and storyboards
- How to create a random terrain tile map using SKTileMapNode and GKPerlinNoiseSource
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
