macOS A book for iOS for who already knows Mac OS X programming

I suggest any book where you can download the code for every chapter, already typed in, with the accompanying Xcode project files. Most books should have that, usually at the website accompanying the book.

How do you find the website accompanying a book? Usually the URL is given in the introduction of the book, or sometimes on the back cover, in the book's index, etc. Or you can google the book's title and author, and see what websites come up. It's not that hard if you have reasonable search skills.

Given that you have all the code that's presented in the book, I suggest the following strategy. First, compile it as-is, browse through it, and see if you understand what the code is doing, just by reading the code and its comments. Second, try the first exercise at the end of the chapter. If you succeed easily, try a harder exercise. If you don't succeed easily at the exercise, study the chapter and the code more thoroughly.

Focusing on the exercises instead of typing every line of the book's code means you spend more time thinking about your own code and how it uses the presented concepts, rather than getting mired in the trivial details of loops, methods, or whatever basic building-block is being presented.

ramy1989 said:

Thank you both for the answers, btw my book has the solutions, but till now I always typed personally the code (it's a suggest from the author of the book).I'll try that way, and see if I can go ahead this way or by O'Reilly 's book instead.

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I recommend typing it in, too, for those who've never programmed before. It's how you get familiar with the patterns of words and punctuation (syntax), which are so markedly different from normal writing.

For those who already know the language, though, it makes little sense to type it all in. You're already familiar with what the language syntax looks like.