macOS How to use panel in Cocoa

[sebastijan]

How can I make drop down panel like this in Cocoa?

Can someone explain this to me step by step?

Thanks!

 

[MacDonaldsd]

http://www.oreilly.com/pub/a/mac/2001/10/05/cocoa.html?page=2

That article may help you.

But in essence a sheet is simply a window that you attach to the window behind it.

So you create and layout the sheet how you would a normal window.