The structure of an Objective-C program

Let's cover what we'll see in every Objective-C program.…I'm going to open Xcode and create another example project.…Again, going to the application section under…OS X and selecting a command line tool.…I'm going to call this one SecondApp.…We shouldn't need to do anything with the…organization name and company identifier this time around.…It should just remember what you put in previously.…And again, just double checking, making sure the type is Foundation.…I'll click Next and go through and just save this into My Documents folder.…Going onto this left-hand side, into the navigators, I'll…just expand all the folders that I have here.…

But there's not a lot to see.…We've got a few files I can single-click on, like this PCH and this .1 file.…But I'm looking for Objective-C, and we have that…in this one main.m file, just a little Objective-C here.…Let's take this line by line.…Lines 1 through 7 are just comments.…We've got the two forward slashes at the start, so everything else…after that is ignored and Xcode makes it show up in green.…