Capture swipe and tap coordinate?

[zhenghx1105]

void handle_event (void* target, void* refcon, IOHIDServiceRef service, IOHIDEventRef event) {
if (IOHIDEventGetType(event)==kIOHIDEventTypeDigitizer){
IOHIDFloat x=IOHIDEventGetFloatValue(event, (IOHIDEventField)kIOHIDEventFieldDigitizerX);
IOHIDFloat y=IOHIDEventGetFloatValue(event, (IOHIDEventField)kIOHIDEventFieldDigitizerY);
int width = [[UIScreen mainScreen] bounds].size.width;
int height = [[UIScreen mainScreen] bounds].size.height;
NSLog(@"click : %f, %f", x_width, y_height) ;
}
}
I use this code .How can I judge subevent swipe or tap ?thank for all