How to use Dynamic Type to resize your app's text
Swift version: 5.0
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.
LEARN SWIFTUI FOR FREE I wrote a massive, free SwiftUI tutorial collection, and also have a growing list of free SwiftUI tutorials on YouTube – get started today!
Available from iOS 7.0 – see Hacking with Swift tutorial 32
Did this solution work for you? Please pass it on!
Other people are reading…
- How to set the tabs in a UITabBarController
- How to activate multiple Auto Layout constraints using activate()
- How to add a bar button to a navigation bar
- How to make UICollectionView headers stay fixed using sectionHeadersPinToVisibleBounds
- What is a UIViewController
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
