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POWhat does the Asterisk * mean in Objective-C?
 

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  1. POWhat does the Asterisk * mean in Objective-C?
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    <p>Is it true, that the Asterisk always means "Hey, that is a pointer!" And an Pointer always holds an memory adress?</p> <p>(Yes I know for the exception that a * is used for math operation)</p> <p>For Example: </p> <pre><code>NSString* myString; </code></pre> <p>or</p> <pre><code>SomeClass* thatClass; </code></pre> <p>or</p> <pre><code>(*somePointerToAStruct).myStructComponent = 5; </code></pre> <p>I feel that there is more I need to know about the Asterirsk (*) than that I use it when defining an Variable that is a pointer to a class.</p> <p>Because sometimes I already say in the declaration of an parameter that the Parameter variable is a pointer, and still I have to use the Asterisk in front of the Variable in order to access the value. That recently happened after I wanted to pass a pointer of an struct to a method in a way like [myObj myMethod:&amp;myStruct], I could not access a component value from that structure even though my method declaration already said that there is a parameter (DemoStruct*)myVar which indeed should be already known as a pointer to that demostruct, still I had always to say: "Man, compiler. Listen! It IIISSS a pointer:" and write: (*myVar).myStructComponentX = 5;</p> <p>I really really really do not understand why I have to say that twice. And only in this case.</p> <p>When I use the Asterisk in context of an NSString* myString then I can just access myString however I like, without telling the compiler each time that it's a pointer. i.e. like using *myString = @"yep".</p> <p>It just makes no sense to me.</p>
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    1. COThis is actually a C question as it is not specific to Objective-C :)
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      1. POWhat does the Asterisk * mean in Objective-C?
      1. USTamas Czinege
    2. COduplicate of http://stackoverflow.com/questions/581657/why-do-i-have-to-write-mypointervar-only-sometimes-in-objective-c
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      1. POWhat does the Asterisk * mean in Objective-C?
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    3. COwhat is specific to Objective-C is the notation @"..." for a string object. In Cocoa, the class of such string objects is NSString.
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