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objective-c access level?

381 Views 3 Replies Latest reply: Feb 5, 2013 10:02 AM by Febwind RSS
Febwind Level 1 Level 1 (0 points)
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Feb 5, 2013 8:10 AM

Does objective-c has the same access level as Java? For example, private, public,default and protected?

  • etresoft Level 7 Level 7 (23,895 points)
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    Feb 5, 2013 9:42 AM (in response to Febwind)

    Yes, but they are rarely used. You can specify @protected or @private if you want. That is an artifact of old-school object-oriented software which really isn't practical in the real world.

  • g_wolfman Level 4 Level 4 (1,110 points)
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    Feb 5, 2013 9:51 AM (in response to Febwind)

    You can indicate that attriburtes are public, protected or private, which will protect them from illegal access at compile-time.  Protected is the default in Objective-C.  However, becasue Objective-C is a dynamic language, you can't really control run-time access to the attributes the way you can in a static language.

     

    All methods are public, all the time, in Objective-C.  You can mark them as @interface and @implementation to indicate that they are (or aren't) supposed to part of the object's API.  Methods marked @implementation won't be exposed.  But that doesn't actually stop anyone from calling them if they know the methods exist.

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