One of the major shortcommings of Dynamic Type in iOS is the inability to use custom fonts.

To implement custom dynamic type for a project I wrote this code.

The app that currently uses this code in the store is availible here: www.appstore.com/QEDC.

This will only work for iOS 7. I will test with iOS 8 as its release date approaches.

Clone this repository and drag UIFont+RSCustom.h/.m and customFont.plist to your project.

Adding a Custom Font is a easy but an error can be hard to diagnose if done incorrectly.

Drag your font file to the project and make sure you add the font to the target

You can specify which fonts you want to use for which category in a pList called customFonts. Below is a example.

After importing UIFont+RSCustom.h in the necessary file, you can assign a custom font to any font instance like this:

 self.labelBody.font = [UIFont customFontForTextStyle:UIFontTextStyleBody];

Unfortunately, this font will not automatically update if the user changes their preferred text size after you set the font. You need to observe for UIContentSizeCategoryDidChangeNotification in case this unlikely event occurs.

in viewDidLoad/WillAppear/DidAppear add

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(sizeChanged:)
                                             name:UIContentSizeCategoryDidChangeNotification
                                           object:nil];

Then implement sizeChanged:

-(void) sizeChanged:(id) sender {

   self.labelBody.font = [UIFont customFontForTextStyle:UIFontTextStyleBody];

   // call invalidateIntrinsicContentSize if using Auto Layout
   [self.labelBody invalidateIntrinsicContentSize];
}

Please open an issue for bugs and feature requests. I would prefer to to have a discussion about the bug/feature request and then we can discuss who will submit the pull request for the issue.

I will be watching out for updates to XCode 6 and Interface Builder to render the fonts at the right time.

MIT License