So now that you have gotten your hands a bit dirty in the code, lets learn about Interface Builder. If you noticed when you launched your application, there was a blue/white gradient that was blank. So lets do a quick tutorial on how to populate that in Interface Builder.
So in the files section in xcode you will see a MainWindow.xib. If you double click that it will launch Interface Builder.
It looks like the following
If you do not see all the dialogues make sure they are in view.
So now that all is working if you click on the blue bar on top of the View on the Navigation Controller box on the right dialog.
On the Inspector if you select the first tab you will see
You can set a title here and then File -> Save
Go back into Xcode and build the code and you will see that the bar now has your title you put in. I did Photoblog so mine looks like the following.
I am not including any source code into this since its mostly Interface Builder here.