How to create DropDown in xcode?

Question

I am a very new developer for IOS, i need help, How to create dropdown box in xcode, any one provide me example to create country list in drop down?

Answer 1

just for whom searching for small simple swift combo box here in 2016 year, i've tried a few of old and new (but obj-c) libs, and at last selected this:

https://github.com/sw0906/SWCombox

here is screenshot: