Listing Bluetooth Devices Natively In Objective-C

Using bluetooth with Objective-C can be achieved with the IOBluetooth framework.

An example of some useful classes for basic operation are:

• IOBluetoothDevice
  • connection methods
  • [IOBluetoothDevice pairedDevices] returns an NSArray of paired devices
  • alot of other stuff
• IOBluetoothDeviceInquiry
  • looks for available devices
• IOBluetoothHostController
  • the powerState property can tell you if your own bluetooth is on or off

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Here is some example code for using IOBluetoothDeviceInquiry to get the address of each bluetooth device in range. Start the inquiry process with something like:

IOBluetoothDeviceInquiry *inquirer = [IOBluetoothDeviceInquiry inquiryWithDelegate:self];
// Configure further here if necessary
[inquirer start];

Now, you can get the address of the found devices using the IOBluetoothDeviceInquiryDelegate methods:

#pragma mark - IOBluetoothDeviceInquiryDelegate Methods

- (void) deviceInquiryComplete:(IOBluetoothDeviceInquiry *)sender error:(IOReturn)error aborted:(BOOL)aborted {
    NSArray *devices = [sender foundDevices];
    for (IOBluetoothDevice *device in devices) {
        const BluetoothDeviceAddress *address = [device getAddress];
        // Do something with address
    }
    [sender performSelector:@selector(start) withObject:nil afterDelay:7];
}

The following Mac Dev Center reference maybe of interest to you. It is a little in depth but does have code examples.

Introduction to Bluetooth Device Access Guide