My .iig file looks like this, I need to use different class IOUserHIDEventService and IOUserClient. How to modify the class of .llg? Use two different class functions in public: DriverKit.iig #ifndef DriverKit_h #define DriverKit_h #include <Availability.h> #include <DriverKit/IOService.iig> #include <HIDDriverKit/IOUserHIDEventService.iig> class IOHIDElement; class IOHIDDigitizerCollection; class DriverKit: public IOUserHIDEventService { public:   virtual bool init() override;   virtual void free() override;   virtual kern_return_t Start(IOService * provider) override; .......   ....... #endif /* DriverKit_h */

On the same computer, using Xcode to run the APP to install DriverKit, my USB device can work, and I can see the output os_log. But using Xcode archive Export Notarized App, installing DriverKit, the USB device does not work, and the system os_log cannot be seen. Is there any difference between these two installations? Run the systemextensionsctl command-line tool with the list option from Terminal, the two are the same DriverKit [activated enabled].

I read the example "Communicating Between a DriverKit Extension and a Client App". https://developer.apple.com/documentation/driverkit/communicating_between_a_driverkit_extension_and_a_client_app But I still don't know, can I communicate with DriverKit through SwiftUI APP? Instead of using IOServiceOpen in CppUserClient, can I use IOServiceOpen in SwiftUI APP like this? Or are there other options?

I’m developing a DriverKit sample test company’s USB Controller. My example will appear in the system log: Code has restricted entitlements, but the validation of its code signature failed. Hello World is not printed. What happened? command-line systemextensionsctl list in Terminal,.dext is installed in /Library/SystemExtensions folder.