Corebluetooth to fetch device names using Swift

Question

I'm using CoreBluetooth framework in my iOS application to scan and connect to other bluetooth devices. I'm able to scan successfully for devices using below code:

var centralManager: CBCentralManager?
var peripherals = [CBPeripheral]()
centralManager = CBCentralManager(delegate: self, queue: DispatchQueue.main)

In the CBCentralManagerDelegate, I implemented below code:

extension ViewController: CBCentralManagerDelegate {
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        if (central.state == .poweredOn){
            self.centralManager?.scanForPeripherals(withServices: nil, options: nil)
        }
    }

    func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {

        if !peripherals.contains(peripheral) {
            let localName = advertisementData[CBAdvertisementDataLocalNameKey]
            print("\(String(describing: localName))" )
            peripherals.append(peripheral)
            tableView.reloadData()            
        }
    }
}

From above code localName is always nil. Am I missing any code?

To add more info,
When I am scanning for bluetooth devices in my Mac, I'm able to see the names of the devices. But when I am scanning for bluetooth devices on my iPhone, none of them are listed.

I cross checked and made sure that I enabled blue tooth on 4 more devices with me (iPad, 2 Android Phones and 1 Android TV)

Answer 1

I changed in your code only source of name - instead of:

let localName = advertisementData[CBAdvertisementDataLocalNameKey]

I use:

let localName = peripheral.name

and now I see name of BLE devices around me.