Is it possible to connect to a wifi access point using iOS 4 SDK

I was wondering if it is possible to list and connect to nearby wifi access points programmatically. The Reachability sample only addresses if the device is connected to wifi or 3G/edge, and using something like the CaptiveNetwork API allows me to register if wifi authentication should be handled by a custom application but does not contain anything relating to the wifi connection aspect. Ideally I am looking for something like android.net.wifi.WifiManager from the Andro开发者_运维技巧id SDK.

This is not possible with the public API.

There used to be Apps in the App Store which did this using private methods, but they have been removed by Apple.