I want to start learning Xcode,

My personal advice: don't wait, there is enough to learn with IOS 5. Otherwise, you will never start.

Ideally, you want the source of instruction to be teaching IOS 5 (or 6) development skills while using Xcode 4.2 or later as the IDE platform. Make sure you have the relevant development libraries and documentation downloaded from Xcode preferences.

iOS 6 is already out. You can still develop for iOS 5, but your apps will be outdated. Also, Beginning iOS 5 Development is for current iOS programmers looking to upgrade their skills to iOS 5.

For complete beginners to XCode and Objective-C (the programming language used to make iPhone apps) I would reccomend Team Treehouse (click here to get 50% off for your first month).

Hope this helps!

Just so you know, "Beginning iOS 6 Development" is out! Well, almost. You can buy the digital "alpha book" right now, which contains almost everything, and then you'll automatically get the final digital version within the next week.

http://www.apress.com/9781430245124

Or, if you want a paper book, you can pre-order it from Amazon and have it in a couple of weeks.

http://www.amazon.com/Beginning-iOS-Development-Exploring-SDK/dp/1430245123

The old version is fine of course, but the new version covers some new material, matches the latest Xcode (which has really changed quite a bit in a year) and has improvements all over the place.

//jack