Thanks to the FAMOC system, you can help out the users of devices with the Wi-Fi configuration. Creating a configuration allows you to define network settings, passwords, protocol used, etc. For iOS devices, you need to create a iOS general profile configuration.
To do this go to the ADVANCED > Config Center > Configurations. Click 
to add a new configuration. Select iOS from the drop-down menu and then Configure basic iOS profile.
Click 
in the WLAN network section. Enter the network name, and then select encrypt type (WPA/WPA2, WEP, WPA/WPA2 Enterprise, WEP Enterprise).
For WPA / WPA2 and WEP settings, you can add an access password, while for Enterprise modes, protocol settings and certificate settings.
Then select whether the network is hidden and decide whether the device should automatically connect to the network. You can also add proxy settings.
The last step is to determine the type of network - Standard, Hotspot or Passpoint (HotSpot 2.0). For Passpoint mode, make additional settings.
Once everything is set save configuration. You can send it manually to the device using 
button, or add it to a policy template in Policy elements tab.