How do I support Dynamic Type in UILabel
and UITextView
in iOS 7? I\'m adapting one of our projects for iOS 7 and would like to support this accessibil
In Swift 3 and iOS 10 you can use
headline.font = UIFont.preferredFont(forTextStyle: UIFontTextStyleHeadline)
headline.adjustsFontForContentSizeCategory = true
See this excellent post for more information, especially how to support pre iOS 10.
If you use the new UIFont
methods then you're pretty much there - you just need to add the observer to listen for changes.
Rather than setting a specific font size, you should use the preferredFontForTextStyle:
and related methods when styling your labels (if you're using Interface Builder you can select a style directly in the inspector). For example:
self.label.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
Once you've done that you should listen for the UIContentSizeCategoryDidChangeNotification
. When you receive this notification you should layout your labels to support the newly selected size (if you're using autolayout this is normally as simple as sending invalidateIntrinsicContentSize
to your views).
If you're looking for official documentation then take a look at the Text Programming Guide.