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Home/ Questions/Q 1012235
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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T09:54:55+00:00 2026-05-16T09:54:55+00:00

In Interface Builder I in Library->Classes when I select a class that I made

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In Interface Builder I in Library->Classes when I select a class that I made in XCode, then display the Actions, I can see two with the same name:

foo
foo:

What is the difference between these two foos?

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  1. Editorial Team
    Editorial Team
    2026-05-16T09:54:55+00:00Added an answer on May 16, 2026 at 9:54 am

    foo is a method that doesn’t accept any arguments. foo: passes an argument or arguments into its method.

    Example:

    -(IBAction)foo;
    

    will be shown as foo in IB.

    -(IBAction)foo:(id)sender;
    

    will be shown as foo: in IB.

    I don’t know why they have the same name, do you have them set that way?

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