Question

Are class methods convenience methods i.e. part of the framework e.g. +(id)alloc and instance methods are those that were implemented by the developer?

I can’t seem to understand the difference between instance methods and class methods.

Answer 1

A class method is a message sent to the class object, whereas an instance method is a message sent to an instance of that class.

For instance:

[Dog allDogs]; // class method: ask the class Dog about its instances
[theDog bark]; // instance method: tell a specific instance of Dog to bark