test.m

#import <AppKit/NSScreen.h>
#import <AppKit/AppKit.h>
#import <Foundation/NSString.h>
#import <Foundation/NSNotification.h>
#import <CoreGraphics/CoreGraphics.h>
// #include <stdio.h>
#include <pthread.h>
#include <unistd.h>



int main()
{


	for(int i=0;i<20;i++)
	{
		sleep(1);
		NSArray *screens = [NSScreen screens];
		NSLog(@"Screens=%lu",[screens count]);
		for (NSScreen *screen in screens) {
			NSLog(@"%@", [[screen deviceDescription] objectForKey:@"NSScreenNumber"]);
			NSPoint origin = [screen frame].origin;
			NSLog(@"(%d,%d):%x", (int)origin.x,(int)origin.y,[[[screen deviceDescription] objectForKey:@"NSScreenNumber"] intValue]);
		}  
	}
}