Understanding UIWebView

UIWebView is a user-interface element that displays web content. This not only includes Hypertext Markup Language (HTML) and static pictures, but also PDFs and documents in Microsoft Office (Excel .xls, Word .doc, and Powerpoint .ppt) and iWork formats (Keynote .key.zip, Numbers .numbers.zip, and Pages .pages.zip). However, Flash and Java are not supported.

To be displayed, a web view must be added to the view hierarchy. Conceptually displaying web content involves two phases. First, the data must be downloaded from a server. Second, it must be parsed and rendered.