iOS - How to programmatically connect to a WiFi network given the SSID and password

With iOS 11, Apple provided public API you can use to programmatically join a WiFi network without leaving your app.

The class you’ll need to use is called NEHotspotConfiguration.

To use it, you need to enable the Hotspot capability in your App Capabilities (Adding Capabilities). Quick working example :

NEHotspotConfiguration *configuration = [[NEHotspotConfiguration
 alloc] initWithSSID:@“SSID-Name”];
configuration.joinOnce = YES;

[[NEHotspotConfigurationManager sharedManager] applyConfiguration:configuration completionHandler:nil];

This will prompt the user to join the “SSID-Name” WiFi network. It will stay connected to the WiFi until the user leaves the app.

This doesn't work with the simulator you need to run this code with an actual device to make it work.

More informations here : https://developer.apple.com/documentation/networkextension/nehotspotconfiguration

connect wifi networks in iOS 11. You can connect wifi using ssid and password like following.

Enable Hotspot on App Id configure services

After Enable Hotspot Configuration

Swift 4.0 Code for iOS 11 Only:

import NetworkExtension

...

let configuration = NEHotspotConfiguration.init(ssid: "SSIDname", passphrase: "Password", isWEP: false)
configuration.joinOnce = true

NEHotspotConfigurationManager.shared.apply(configuration) { (error) in
    if error != nil {
        if error?.localizedDescription == "already associated."
        {
            print("Connected")
        }
        else{
            print("No Connected")
        }
    }
    else {
        print("Connected")
    }
}

Contrary to what you see here and other places, you can do it. It's hard to make pretty enough for normal users, but if doesn't have to be then it's really easy to code. It's an enterprise admin thing, but anyone can do it. Look up "Connection Profiles." Comcast does this in their iOS app to setup their hotspots for you, for example.

Basically, it's an XML document that you get the device to ingest via Safari or Mail. There's a lot of tricks to it and the user experience isn't great, but I can confirm that it works in iOS 10 and it doesn't require jailbreaking. You use Configurator to generate the XML, and I suggest this thread for serving it (but people don't find it because it's not specifically about WiFi), and this blog for querying if it's installed which is surprisingly nontrivial but does indeed work.

I've answered this question many times, but either don't have enough rep or am too dumb to figure out how to close questions as duplicate so better answers can be found more easily.

UPDATE: iOS 11 provides APIs for this functionality directly (finally!). See NEHotspotConfiguration. Our Xamarin C# code now looks like:

var config = new NEHotspotConfiguration(Ssid, Pw, false);
config.JoinOnce = false;