Define instance Variables without property

Question

I know that it is possible in Objective C to define an instance variable without a property when I use curly braces in the top of the interface or the implementation. But what is the advantage when I do that?

Don't look for advantages. It's archaism of objective-c. – Cy-4AH Oct 28 '14 at 11:35 — Cy-4AH, Oct 28 '14 at 11:35

score 0 · Answer 1 · edited May 23 '17 at 12:00

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The most advantage is this variables actually can be private/protected/public members according to the keyword (@private/@protected/@public) you set.

Take a look at this question

edited May 23 '17 at 12:00

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answered Oct 28 '14 at 11:30

Daniyar

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KudoCC · Accepted Answer · 2014-10-28T12:03:29.410

I think your question should be comparing to property what is the advantage of defining instance variables.

Most property is backed by a instance variables. By default, a readwrite property will be backed by an instance variable, which will be synthesized automatically by the compiler. (A readonly property won't synthesize an instance variable, it only synthesizes a getter method which a readwrite property synthesize an instance variable and a getter and a setter method)

So property provides methods that synthesized by compiler to access the instance variable. I can't say which one has any advantages, just use the one which is proper to your case.

You may need to learn more about property. Properties Encapsulate an Object’s Values

Define instance Variables without property

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