cocoa - How to implement key equivalent for NSSearchField -

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i have cocoa application building contains nssearchfield control. want enable keyboard shortcut / key equivalent when uses presses command-option-f, search field gets focus.

however, after searching, not clear me best way implement is. there not option set nssearchfield in interface builder.

is solution subclass nssearchfield , listen keydown event (and see if key equivalent pressed?)

you can add menu item key equivalent of ⌘⌥f i.e. commandoptionf. in menu's action, manually make search field first responder using 

[window makefirstresponder:searchfield];

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