iPad PDF FAQ: How do I transfer a PDF file onto my iPad, iPhone, or iPod? (Or, "How can I read a PDF on my iPhone, iPad, or iPod?)
Since the iPod, iPhone, and iPad all use the Apple iOS operating system, the process of getting a PDF file onto these devices is identical (or nearly identical) for each device. In this article I'll generally refer to the iPad, as it's actually hard to read most PDF documents on an iPhone of iPod.)
There are several ways to get a PDF file onto an iPad, but in general, the plan is to (a) get the PDF to your device, (b) open the PDF in the iBooks app, and (c) read it from there. Let's look at the different ways to get a PDF onto your iPad, iPhone, or iPod.
Assuming you have the PDF on your computer, one of the easiest ways to get the PDF onto an iPad is to mail the PDF file to yourself. Then, check the mail from your iPad, select your email message, and tap the PDF attachment to open it. Once the PDF is open, tap the "Open in iBooks" button at the top of the screen. The iBooks app will open, place the PDF on your bookshelf, and you'll be able to read it from there.
If you see a link for a PDF online that you want to read, just tap that URL, and the PDF should open properly on your iPad. Again, once you're viewing the PDF, just tap the "Open in iBooks" button to copy the PDF document onto your iBooks bookshelf.
I keep wanting it to be really easy to get a PDF document from my computer onto my iPhone, but I find the current approach surprisingly cumbersome, and also hidden. I guess if you keep thinking "iTunes is the gateway to my iPhone/iPad/iPod", you'll eventually find this trick.
This last "iPad PDF" approach goes something like this:
To me, this is a much more cumbersome process than mailing the PDF file to myself. I hope one day Apple will make things like the iBooks bookshelf more transparent, so you can see your iPhone filesystem from your computer, and just drag and drop the PDF from your computer to an iBooks folder on your iPhone or iPad, but until then, just keep thinking of iTunes as the interface to your iPhone, iPad, or iPod.
(One obvious thing here: "iTunes" needs to be renamed. Since it's the interface to your iPhone, iPad, and iPod, and is now responsible for all sorts of media -- music, videos, and now books -- it needs to be called iGateway, iMedia, or some other name.)
I hope these iPhone/iPad PDF tips have been helpful. As mentioned, because the iPad, iPod, and iPhone all use the same iOS operating system, the same iPad PDF reading techniques will work on the iPod and iPhone. If I find any new ways to get PDF files onto these devices and read them there, I'll be glad to share them. For now, these approaches, and using iBooks as a PDF reader, seem to be the way to go.