handsFree(_:signalStrength:)
Tells the delegate the call setup signal strength indicator of the connected Bluetooth hands-free phone or headset has changed.
Declaration
optional func handsFree(_ device: IOBluetoothHandsFreeDevice!, signalStrength: NSNumber!)Parameters
- device:
The connected Bluetooth hands-free phone or headset.
- signalStrength:
The new value of the signal strength indicator. For possible values, see Iobluetoothhandsfreeindicatorsignal.