watchOS：CBCentralManager.state 始终未授权

Question

I am trying to use CBCentralManager in watchOS to scan for BLE devices. I use the following code to start the scanning process:

centralManager = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionShowPowerAlertKey: true])

This causes the following function to be called (as expected):

internal func centralManagerDidUpdateState(_ central: CBCentralManager) {

Problem: central.state is always .unauthorized

I have included Privacy - Bluetooth Always Usage Description and Privacy - Bluetooth Peripheral Usage Description in info.plist for both the watchApp and watchAppExtention.

Is there something else that I should be doing (eg, include something in the entitlement file)? My app is not a peripheral; it is supposed to be in the "central" mode in foreground (not background).

Thanks!

Answer 1

I found the answer: The privacy permissions in the info.plist must be placed in the iOS app (not the watchOS app). Then make a dummy request in the iOS app using the following code and users gets pop up that asks for Bluetooth access permission with the reason that you've provided in the info.plist .