How to use Dynamic Type to resize your app's text
Swift version: 5.4
Ever since iOS 7.0 users can set a system-wide preferred font size for all apps, but many programmers ignore this setting much to user's annoyance. You're not one of those developers, are you? Of course not! So here's how to honor a user's font settings using UIFont:
let headlineFont = UIFont.preferredFont(forTextStyle: .headline)
let subheadFont = UIFont.preferredFont(forTextStyle: .subheadline)And that's it! This technology is called Dynamic Type, and it's powerful because that code will return correctly sized fonts for the user's preference, which means your app's text will shrink or grow as needed.
Note that it is technically possible for users to change their Dynamic Type setting while your app is running. If you want to cover this corner case, use NotificationCenter to subscribe to the UIContentSizeCategoryDidChange notification then refresh your user interface if you receive it.
SPONSORED Spend less time managing in-app purchase infrastructure so you can focus on building your app. RevenueCat gives everything you need to easily implement, manage, and analyze in-app purchases and subscriptions without managing servers or writing backend code.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 7.0 – see Hacking with Swift tutorial 32
Similar solutions…
- How to run code when your app is terminated
- SwiftUI tips and tricks
- How to localize your iOS app
- How to change your app icon dynamically with setAlternateIconName()
- All SwiftUI property wrappers explained and compared
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
