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Is there an API in CocoaTouch/iOS for detecting wireless networks? I want to write an app that saves a list of networks the phone can see at a given moment.
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On iOS devices there is no public API for scanning WiFi networks.
After your Surface restarts, sign in to Windows. Go to Start, and select Settings > Network & internet > Wi-Fi > Show available networks, and see whether your wireless network name appears in the list of available networks. If you see your wireless network name, select it and select Connect.
To do this, open System Preferences, and then click Network. Select Wi-Fi in the sidebar, and then click Advanced. In the Wi-Fi tab, you will see a list of networks. This list is mainly there so you can choose an order of preference for joining networks.
From the Wi-Fi settings, tap the new "Edit" button and authenticate yourself using Face ID, Touch ID, or your passcode. Once authenticated, you'll see a list of Known Networks, which are all of the hotspots you've saved to your iPhone or iCloud Keychain from your other Apple devices.
As far as I know you can get the information about the current connected Wi-Fi using CNCopySupportedInterfaces and CNCopyCurrentNetworkInfo of CaptiveNetwork. You can refer to: How do I use CaptiveNetwork to get the current WiFi Hotspot Name for more information.
According to iPhone get a list of all SSIDs without private library:
Without the use of private library (Apple80211) you can only get the SSID of the network your device is currently connected to.
You could have a look at iphone-wireless project if you are interested in Apple80211. There exists a sample app "Stumber" which does exactly what you want. But you cannot use this in your app if you want to publish to App Store because as it uses private APIs
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