Cocoa versus Cocoa Touch - What is the difference?

Question

I am learning iOS development in Objective-C, and I have found a lot of code examples.

Some of them, though, say that they are only for Mac OS X (not iOS).

C

Answer 1

Application Framework For
i) Cocoa is the application framework for Mac OS X.
ii) Cocoa Touch is the application framework for iPhone and iPod Touch.

Frameworks
i) Cocoa: Foundation and AppKit.
ii) Cocoa Touch: Foundation and UIKit

Absence of certain classes
Cocoa has NSHost and Cocoa Touch doesn't

API
i) Cocoa: All the classes used in Cocoa have the NS prefix Ex: NSTextField
ii) Cocoa Touch: classes used in Cocoa have the UI prefix Ex: UITextField

MVC patterns
i) Cocoa: Cocoa has multiple alternative design patterns – in addition to MVC
ii) Cocoa Touch: The iPhone SDK has a reinforced MVC system, which performs better than the default MVC in Cocoa

Other Differences
There Are also Differences In App Lifecycle, Sandboxing ,Memory Footprint

Links:
http://teks.co.in/site/blog/cocoa-vs-cocoa-touch-beginners-guide/ http://iphonenativeapp.blogspot.in/2011/02/difference-between-cocoacocoa-touch-and.html https://iphonecodecenter.wordpress.com/tag/difference-between-cocoa-cocoa-touch/