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Re: Private Methods
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Re: Private Methods


  • Subject: Re: Private Methods
  • From: email@hidden
  • Date: Fri, 22 Feb 2008 12:23:50 +0100


On 22 Feb 2008, at 12:00, Philip Bridson wrote:

How do I make a method private?

I have tried putting @private before the method that I want to make private but the compiler flags a parse error. I read the documentation and I can only find reference to private member variables. I want to make sure that a method can only be accessed via another method in the same class. Is this possible in Objective- C or do I need to write this class in C++?


No, you can't declare methods private in an interface.

What you can do, in your .m file is declare a private interface to your object.

E.g in MyObj.h

@interface MyObj : NSObject {

}

-(void) onePublicMethod;

@end

In MyObj.m

@interface MyObj(PrivateStuff)
-(void) aPrivateMethod;
@end;

@implementation MyObj

-(void) aPrivateMethod
{
// Do something
}

-(void) onePublicMethod
{
[self aPrivateMethod];
}
@end


As with all Obj-C stuff though, if someone finds out about your method signature, then there is nothing to stop them calling it.


Matt
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