pyobjc_device_discovery_extension_subclass_with_session_events.py

1import DeviceDiscoveryExtension
2import Foundation
3
4class MyDeviceDiscoveryExtension(DeviceDiscoveryExtension.DDDiscoveryExtension):
5    def beginDiscoveryWithSession_(self, session):
6        """
7        Called by the system when a discovery session starts.
8        """
9        print(f"Discovery started with session: {session}")
10        
11        # Configure the session's event handler
12        session.setEventHandler_(self.handleSessionEvent_)
13        
14        # Start scanning (example: searching for specific service types)
15        # Note: In a real app, you would define DDDiscoveryParameters here.
16        session.start()
17
18    def handleSessionEvent_(self, event):
19        """
20        Handles events sent by the DDDiscoverySession.
21        """
22        event_type = event.eventType()
23        if event_type == DeviceDiscoveryExtension.DDEventTypeDeviceFound:
24            print(f"Device found: {event.device()}")
25        elif event_type == DeviceDiscoveryExtension.DDEventTypeDeviceLost:
26            print(f"Device lost: {event.device()}")
27
28# Note: DeviceDiscoveryExtension is typically used within an App Extension 
29# target and is managed by the system's extension host.
30if __name__ == "__main__":
31    print("DeviceDiscoveryExtension framework loaded successfully.")
32    print("Framework constants check:", DeviceDiscoveryExtension.DDEventTypeDeviceFound)