opens a basic window

window.c

// macOS

// CFLAGS += -ObjC
// LDFLAGS += -framework Cocoa

#import <Cocoa/Cocoa.h>

int main() {

	[NSApplication sharedApplication];
	[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
	[NSApp activateIgnoringOtherApps:YES];

	NSWindow *window = [[NSWindow alloc]
		initWithContentRect:NSMakeRect(0, 0, 400, 400)
		styleMask:
			0
			| NSWindowStyleMaskTitled
			| NSWindowStyleMaskClosable
			| NSWindowStyleMaskResizable
			| NSWindowStyleMaskMiniaturizable
		backing:NSBackingStoreBuffered
		defer:NO
	];

	[window setTitle:@"hi"];
	[window center];
	[window makeKeyAndOrderFront:nil];

	while (1) {

		while (1) {

			NSEvent *event = [NSApp
				nextEventMatchingMask:NSEventMaskAny
				untilDate:[NSDate distantPast]
				inMode:NSDefaultRunLoopMode
				dequeue:YES
			];

			if (event == nil) {
				break;
			}

			switch (event.type) {
				case NSEventTypeKeyDown:
					printf("down\n");
					break;
				default:
					break;
			}

			[NSApp sendEvent:event];

		}

	}

}