Why CGSize doesn't use * when declaring variables?

Question

When I create an instance of a class called, say, Sprite, I do something like:

Sprite *mySprite = [[Sprite alloc]init];

But why when creati

Answer 1

The * denotes a pointer. CGSize is declared as a struct and Sprite is a class, and in Objective-C all classes are referenced by a pointer.

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You can find additional information in the Programming with Objective-C documentation. The relevant sections are Use Pointers to Keep Track of Objects and Methods Can Return Values.