I've tried to 开发者_Python百科add NSPopupButton + CustomView, but it's not what I wanted. I would like to mimic "Tasks" on Xcode's toolbar.
You want to change the 'Type' of the NSPopUpButton to "Pull Down."
Here's a great video demonstration on precisely what you're looking for: http://www.youtube.com/watch?v=Qr6EX-JIZZU.
Hey Irwan, I have code that does this in my Fluidium project on GitHub.
Behavior: Standard NSToolbarItem that is an NSButton. When you click and hold on the button, it pops up an NSMenu after a short delay.
Basically identical to Xcode:
http://github.com/itod/fluidium/blob/master/Fluidium/src/FUBackForwardPopUpButton.m
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