What causes CBCentralManagerStateUnknown in iOS?

Question

Why do I get CBCentralManagerStateUnknown on an iPad 2 when using this simple code?

- (BOOL)viewDidLoad {

    bluetoothManager = [[CBCentralManager         


        

Answer 1

You need to both retain the CBCentralManager instance (put it in an ivar or private property) and wait for the state change delegate to be called. (The state is always "unknown" if you check it immediately after instantiating the manager. The real state will appear momentarily in the delegate method.)