How to print an image in iOS 4.2?

I find the Apple documentation difficult to read through. Perhaps someone ou开发者_运维百科t there is willing to share some code on how to easily print a JPG or PNG file in iOS 4.2?

There are three basic steps:

1. Instantiate an NSData object from your file.
2. Create a UIPrintInfo object that contains the job specs.
3. Send the data to a UIPrintInteractionController, which will begin the process.

See this article for a code sample.