Create a drop down select box with dynamic options - ios xcode

Create a drop down select box with dynamic options - ios xcode

I am trying to recreate a popular effect that all iPhone users have seen
before on their settings page. Something like when selecting a wireless
network. There is normally a title that says "Available Networks" with a
blue arrow icon to the right. onClick there is an accordion style slide
down effect to reveal the available networks.
I am trying to recreate this to use as a drop down input for my app's
settings page since iPhone does not have anything like that in their
storyboard builder interface. The other issue is the options will be
dynamic (coming from a database).
Has anyone seen a tutorial on this or maybe an open source app I can use
as reference.
I am using iOS 6.1 using Storyboards.