How can one get a notification when a (Smart) keyboard is connected?
Some context: I am working on a feature that automatically shows and hides my software keyboard based on whether the iPad Pro Smart Keyboard, or another external keyboard is connected or not (like Pages). I have seen this answer but that only applies when a textfield is selected. After a lot of googling, I stumbled into the Apple's ExternalAccessory class which you can ask for connected devices, and then check what these devices are.
I have tried a basic implementation of this and I can't get it to work on my iPad Pro with connected Smart Keyboard (Yes, I am sure it's connected because I can see the letters I type appear on my screen ).
First of all, the docs say that you can detect devices that are through over Bluetooth and Lightning, I can only to hope this also includes the Smart Keyboard connector. I have enabled the Wireless Accessory Configuration capability of my project.
Second, one needs to add the UISupportedExternalAccessoryProtocols key to their info.plist, then needs to specify which protocols are connected. Which protocols there are doesn't seem to be documented, also not for Apple's own devices. I ran into a tutorial that mentioned the iAP2 bluetooth protocol, so I added this and then hoped for the best.
My code
As I haven't set up my project configuration right yet, I didn't add a lot of code either. I tried:
func printAllAccessories() {
for device in EAAccessoryManager.shared().connectedAccessories {
print("connected device with name: ", device.name)
}
}
But noting seems to be connected.
Bottom line
What is the process, including project configuration, to get external keyboard notifications in an iOS App?
There doesn't seem to be any comprehensive documentation of this online so it's probably nice to get that here. Any help would be highly appreciated!
