The following instructions demonstrate how to setup the OneDrive application on an Apple iOS device.
Go to the Apple App store in iOS and search for OneDrive. The OneDrive app now allows you to connect to both a OneDrive for Business and a OneDrive consumer account. (Note the "OneDrive for Business" app still appears in the App store, but it is deprecated and will no longer be available after September 2016)
In the Password field, enter your IdentiKey password, then tap the Sign in button.
The application will configure, then your OneDrive account will be setup.