iPadOS/catalyst マウスホイールのフック方法(^^;…覚書
// notifications for keyboard (dis)connect
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(MouseDidBecomeCurrentNotification:) name:GCMouseDidBecomeCurrentNotification object:nil];
- (void)MouseDidBecomeCurrentNotification:(NSNotification *)notification {
GCMouse *mouse=notification.object;
GCMouseInput *Mi=mouse.mouseInput;