CBBluetoothManagerDelegate Protocol Reference
| Conforms to | NSObject |
|---|---|
| Declared in | CBBluetoothManager.h CBConstant.h |
Overview
The delegate of a CBBluetoothManager object must adopt the CBBluetoothManagerDelegate protocol.
– bluetoothManagerDidUpdateState:
required method
Invoked whenever the bluetooth manager’s state has been updated. Commands should only be issued when the state is CBBluetoothStatePoweredOn. A state below CBBluetoothStatePoweredOn implies that scanning has stopped and any connected peripherals have been disconnected. If the state moves below CBBluetoothStatePoweredOff, all CBPeripheral objects obtained from this bluetooth manager become invalid and must be retrieved or discovered again.
- (void)bluetoothManagerDidUpdateState:(CBBluetoothManager *_Nonnull)managerParameters
manager |
The current bluetooth manager instance whose state has changed. |
|---|
Discussion
You implement this required method to ensure that Bluetooth low energy is supported and available to use on the central device. You should issue commands to the bluetooth manager only when the state of the bluetooth manager is powered on, as indicated by the CBBluetoothStatePoweredOn constant. A state with a value lower than CBBluetoothStatePoweredOn implies that scanning has stopped and that any connected peripherals have been disconnected. If the state moves below CBBluetoothStatePoweredOff, all CBPeripheral objects obtained from this bluetooth manager become invalid and must be retrieved or discovered again. For a complete list and discussion of the possible values representing the state of the bluetooth manager, see the CBBluetoothState enumeration in CBConstant.
See Also
Declared In
CBBluetoothManager.h