By: Aaron Hillegass in Cocoa Tutorials on 2010-09-03
A framework is a collection of classes that are intended to be used together. In other words, the classes are compiled together into a reusable library of code. Any related resources are put into a directory with the library. The directory is renamed with the extension .framework. You can find the built-in frameworks for your machine in /System/Library/Frameworks.
Cocoa is made up of three frameworks:
- Foundation: Every object-oriented programming language needs the standard value, collection, and utility classes. Strings, dates, lists, threads, and timers are in the Foundation framework.
- AppKit: All things related to the user interface are in the AppKit framework. Windows, buttons, text fields, events, and drawing classes are in the AppKit. You will also see this framework called the ApplicationKit.
- Core Data: Core Data makes it easy to save your objects to a file and then reload them into memory. We say that Core Data is a persistence framework.
Numerous other frameworks handle such duties as encryption, QuickTime, and CD burning. Foundation, AppKit, and Core Data are the most commonly used. Once you have mastered these, the other frameworks will be easier to understand.
You can also create your own frameworks from the classes that you create. Typically, if a set of classes is used in several applications, you will want to turn them into a framework.
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Most Viewed Articles (in Cocoa )
Latest Articles (in Cocoa)
- Data Science
- React Native
- Cloud Computing
- Java Beans
- Mac OS X
- Office 365
- Tech Reviews