Cocoa Objects

Coco Objects are actually pretty easy when you think about it. Every object has properties and or methods that can be called. When instantiating a cocoa object you have to allocate it and then initialize it. You can do that in a few ways but the most common way is to use a single line. Below is showing how you can instanciate an NSNumber Object.

PLAIN TEXT
OBJC:
  1. // Method #1 - Prefered Method
  2. NSNumber *number = [[NSNumber alloc] init];
  3.  
  4. // Method #2
  5. NSNumber *number = [NSNumber alloc];
  6. [number init];
  7.  
  8. // Method #3
  9. NSNumber *number;
  10. [number alloc];
  11. [number init];

In the code above you can see why method #1 is the preferred way, it is the easiest to read. Basically when instantiating an object in Objective-C you are saying I am creating a variable called number which is going to hold a value of type NSNumber. In the code to the right of the equals sign you are allocating and initializing the actual object. Pretty easy huh?

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