This document provides developer-level information about features that were introduced in different versions of iPhone OS.
This document is not intended as a complete list of features for each new version of iPhone OS. Instead, it focuses on those features that affect the creation of third-party iPhone applications, providing overviews of each feature along with insight as to how and when you might use them to create your own software. Wherever possible, this document also provides links to other Apple conceptual and reference documentation for that feature. For a complete list of iPhone OS features, see iPhone OS Technology Overview.
This document includes the following article:
“iPhone OS 3.x” describes the new and updated features in iPhone OS 3.0 and iPhone OS 3.1.
Development of iPhone applications requires an Intel-based Macintosh computer running Mac OS X v10.5 or later. You must also download and install the iPhone SDK. For information about how to get the iPhone SDK, go to http://developer.apple.com/iphone/.
Last updated: 2009-08-27
