Exploring the Foundation framework – iPhone

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The Foundation framework defines a base layer of Objective-C classes. In addition to providing a set of useful primitive object classes, it introduces several paradigms that define functionality not covered by the Objective-C language. The Foundation framework is designed with these goals in mind:

  • Provide a small set of basic utility classes.

  • Make software development easier by introducing consistent conventions for things such as deallocation.

  • Support Unicode strings, object persistence, and object distribution.

  • Provide a level of OS independence, to enhance portability.

The Foundation framework includes the root object class, classes representing basic data types such as strings and byte arrays, collection classes for storing other objects, classes representing system information such as dates, and classes representing communication ports.

The Foundation framework introduces several paradigms to avoid confusion in common situations, and to introduce a level of consistency across class hierarchies. This consistency is done with some standard policies, such as that for object ownership (that is, who is responsible for disposing of objects), and with abstract classes like NSEnumerator. These new paradigms reduce the number of special and exceptional cases in an API and allow you to code more efficiently by reusing the same mechanisms with various kinds of objects.

It is a base framework for MAC OSX, IOS application development, this is written in objective C languages. All the classes in this framework start with NS(NEXT STEP)

EX:- NSArray, NSString etc.

Foundation classes:-

1)  NSString                                             2) NSMutable String

3) NS Array                                             4) NSMutableArray

5) NSSet                                                 6) NSMutable Set

7) NS Data                                                8) NS Mutable Dictionary

9) NS Dictionary                                    10) NS Mutable Dictionary

11) NS Date                                            12) NS  Date Formatter

13) NS Timer                                        14) NS  User Defaults

15) NS Thread                                      16) NS URL

17) NS URL Request                             18) NS URL Connection

19) NS Notification Center                   20) NS  Notification

21) NS Object                                          22) NS Number

23) NS Decimal Number                       24) NS Value

25) NS Null                                             26) NS Exception

27) NS File Manager                              28) NS Range

29) NS XML Parser                                30) NS Operation





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