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iOS Objective-C Basics (Retired) Foundation Framework NSNumber

Posted by Kunakorn Puntawong
Kunakorn Puntawong
3,016 Points

Why didn't %@ print out the address that the pointer hold? Don't we need to dereference the pointer before we print it ?

Hi, I came from a C++ background. When ever we want to print out the value that the pointer is pointer to. We have to dereference it with * . In the video, Dough code is :

NSNumber * PI = @3.14; NSLog(@" PI %@", PI);

So, is there no dereferencing in Objective-C. Am I missing something here ?

1 Answer

Jarrod Taylor
Jarrod Taylor
25,619 Points
Jarrod Taylor
Jarrod Taylor
25,619 Points

I think you're looking for & instead of @. &variableName will give you the address and @variableName will give you the description.

NSLog(@"%p", &myVar) will give you the address.

The %@ formatter is used to print the object description and the %p formatter is used for pointers.