The other option is to use it in the wedge mode which will then cause it to take over your entire keyboard functionality. We use one with Apple and the user has to be trained to hit a '-' button on the scanner to disable it as the keyboard and allow the device keyboard to function. Not nearly as clean as Android. You can try to build your own 'keyboard' with a panel and buttons but Apple frowns on that when trying to release it to the store.
Just pair it and when you turn it on you will most likely have to manually have them set focus to the field.