Classes General

Objects are defined in classes and therefore these two terms are often used interchangeably.  Each object is actually an instance of a class.

Creating A Class Object

	NSMutableArray *arrayInstance = [[NSMutableArray alloc] init;

‘alloc’ allocates the memory for the object and ‘init’ initialises it.

Instance Methods

Sent to instances of the class (objects).
Calling:

	//Simple method call:
	[MyObject1 SomeMethod:ArgumentForMethod];

	//Calling a method with multiple arguments:
	[MyObject1 SomeMethod:ArgumentForMethod
				NameOfAnArgument:Argument
				NameOfAnArgument:Argument];

Class Methods

Sent to class itself (to create new instances of the class or retreive soem global property).

Destroy An Object

	[MyObject1 release];		//Destroy the object
	MyObject1 = nil;		//Ensure the pointer to the object (that no longer exists) can't be accidentally used