Text Programming Guide for iOS

You can also turn a view of your app into a miniature web browser capable of understanding and displaying HTML, CSS, and JavaScript content. You do this using a UIWebView object.

When Users Edit Text, Your App Must Manage the Keyboard

Draw and Manage Text Directly

Has a Range of Options for the Input and Editing of Data

For most apps, you can use the high-level text display classes and Text Kit for all their text handling. For smaller amounts of text and special needs requiring custom solutions, you can use alternate, lower level technologies, such as the programmatic interfaces from the Core Text, Core Graphics, and Core Animation frameworks as well as other APIs in UIKit itself.