What’s been impossible on iOS, but easy on Android for years, has finally come (back) in iOS 8.
Wi-Fi scanning can now be performed. You can see SSIDs, even hidden ones, and view RSSI. For now, it’s only available via the Apple Airport Utility and it needs to be manually enabled in settings.
Sorry, no API access for 3rd party developers (yet), but at least WLAN aficionados can finally scan wi-fi on iOS devices!
Download Apple Airport Utility: