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POPrivate methods using Categories in Objective-C: calling super from a subclass
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copied!<p>I was reading how to implement private methods in Objective-C (<a href="https://stackoverflow.com/questions/172598/best-way-to-define-private-methods-for-a-class-in-objective-c">Best way to define private methods for a class in Objective-C</a>) and a question popped up in my mind:</p> <p><strong>How do you manage to implement protected methods, i.e. private methods that are visible to subclasses?</strong></p> <p>Suppose I have a MySuperClass with a Category containing all its private methods, and I want to implement a MySubclass overriding or calling super to one of the MySuperClass private methods. Is that possible (using the Categories approach towards implementing private methods)? </p> <p>Take a look at some of this code, at the bottom there is the overriden method.</p> <pre><code>// =========================== // = File: MySuperClass.h // = Interface for MySuperClass // =========================== @interface MySuperClass : Object ... @end // =========================== // = File: MySuperClass.m // =========================== #import "MySuperClass.h" // ================================= // = Interface for Private methods // ================================= @interface MySuperClass (Private) -(void) privateInstanceMethod; @end // ===================================== // = Implementation of Private methods // ===================================== @implementation MySuperClass (Private) -(void) privateInstanceMethod { //Do something } @end // ================================ // = Implementation for MySuperClass // ================================ @implementation MySuperClass ... @end // =========================== // = File: MySubClass.h // = Interface for MySubClass // =========================== @interface MySubClass : MySuperClass ... @end // ================================ // = Implementation for MySubClass // ================================ #import MySubClass.h @implementation MySubClass //OVERRIDING a Super Private method. -(void) privateInstanceMethod { [super privateInstanceMethod]; //Compiler error, privateInstanceMethod not visible! //Do something else } @end </code></pre> <p>Hopefully somebody already figured this out.</p> <p>Cheers!</p>

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