beginner to xcode why is it so hard

Beginner to Xcode - Why is it so hard?
location: macrumors.com - date: September 15, 2012
Hello, I started learning Xcode with the Big Nerd Ranch Guide 3rd edition, which I ordered from Amazon. It had very good reviews. I come from the background of web development: php, ajax, mysql, js etc. I'm already 1/5 of my way in the book (it has 569 pages) and jesus, it is quite hard! I can handle the objective c syntax, as I learned c in high school, but I can't figure out where do all the methods, function, delegations and stuff come from. It's like there are million of functions and nothing is really systematic. What's with the + and - before functions, and with the stretching lines thingy? Should I give up or should I continue until I finish the book? I know a guy who did a course of an year in a professional school, and I don't think he knows any other programming languages. I really, really want to learn how to develop for iPhone. What should I d
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