Is it necessary, or even good practice, to create properties for all iVars? [duplicate]

Question

This question already has answers here:

Is there any reason to declare ivars if you're using properties exclusively in Objective-C? (4 answers)

Closed 5 years ago.

If an ivar is to be used globally within the class, but will never be accessed by other classes, are we still supposed to use properties?

Answer 1

It is generally a good idea, as the generated accessors will take care of things like memory management and KVO for you. You can put the property in a class extension so other classes can't use it.

Answer 2

For me, it depends on what the instance variable will be used for.

If it's an object representing some data, then I will always use a property.

If it's just a simple BOOL for some internal bookkeeping by a couple of methods in the class, then I won't create a property for it.