mDNS Discovery for AirPlay Devices

Question

I want to make an mDNS Discovery for the AirPlay devices in my network using NetService.

I need to get the device name and IP address of the Device.

func netService() {
        let service = NetService(
                         domain: "local.", 
                         type: "_airplay._tcp.", 
                         name: "Test", 
                         port: 7000)
        service.delegate = self
        service.startMonitoring()
    }