How to use a custom font with dynamic text sizes in iOS7

Question

In iOS7 there are new API\'s for getting a font that is automatically adjusted to the text size the user has set in their preferences.

It looks something like this to

Answer 1

This is how I update the font of a prefferedFontForTextStyle:

UIFont *font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
UIFontDescriptor *fontDesc = [font fontDescriptor];
fontDesc = [fontDesc fontDescriptorByAddingAttributes:@{UIFontDescriptorNameAttribute : @"Helvetica",
                                                        UIFontDescriptorSizeAttribute : @16}];

font = [UIFont fontWithDescriptor:fontDesc
                             size:[fontDesc pointSize]];