ivar – Tarik Billa

Property vs. ivar in times of ARC

April 9, 2023 by Tarik

If a variable: Is declared in a class using ARC. Is used solely for class implementation (not exposed as part of the class interface). Does not require any KVO. Does not require any custom getter/setter. Then it is appropriate to declare it as an ivar without a corresponding @property/@synthesize, and to refer to it directly … Read more

Why would you use an ivar?

November 18, 2022 by Tarik

Encapsulation If the ivar is private, the other parts of the program can’t get at it as easily. With a declared property, the clever people can access and mutate quite easily via the accessors. Performance Yes, this can make a difference in some cases. Some programs have constraints where they can not use any objc … Read more