Developing an iOS App : Stanford Course and Notes

Here is an excellent resource to start learning iOS development.
Its a Stanford University Course that reaches iOS development.

Here it is on iTunesU:

https://itunes.apple.com/us/course/developing-ios-7-apps-for/id733644550

Also,

a viewController's variables or properties can be accessed in two ways:

self.<propertyName>
or
_<propertyName>

I will compile similar notes on Objective C and post them in a later blog post.