NSPopUpButton placeholder value?

Question

Notice in Xcode's symbols list (the NSPopUpButton directly above the editor, to the right of the recently edited documents), it shows <No selected symbol> when you're out of scope of any symbols it lists, but then when you click on it that option is not there. Is there a trick to making this "placeholder" magic happen, or is there a setter somewhere I'm not seeing?

Answer 1

If you're using bindings, you can set null/no selection placeholders and turn on "Inserts Null placeholder" using Interface Builder's bindings inspector. If you're not using bindings, you can put whatever menu item in there you like at runtime.