How to display a list of Wifi-Networks in an iPhone app?

Question

I found some private (undocumented) APIs but Apple does not allow apps to use private frameworks. So does anyone know how to do this using Apple official packages?

like:

Answer 1

If you set the UIRequiresPersistentWiFi setting in your info.plist file, the iPhone OS will know that your app needs Wifi and pop up the message for you.

As far as I know, no app actually manually displays the wifi selection alert.