Objective-C use of pointers

Question

When do you and when dont you need the * symbol (which is because in objective-c all variables like NSString are pointer variables)?

For example when do you need to do "NSString *" instead of just "NSString"?

Answer 1

In Objective-C, all object references are pointers, so you always need the pointer operator when you declare with an Objective-C object.

For other types, the use is exactly the same as in C. Use pointers when you want to pass data structures or primitive types by reference.