main.m

//
//  main.m
//  Simple iTunes
//
//  Created by Colt on 4/13/13.
//  Copyright 2013 __colt__. All rights reserved.
//

#import <Cocoa/Cocoa.h>

int main(int argc, char *argv[])
{
    return NSApplicationMain(argc,  (const char **) argv);
}

Simple iTunes.h

//
//  Simple iTunes.h
//  Simple iTunes
//
//  Created by Colt on 4/13/13.
//  Copyright 2013 __colt__. All rights reserved.
//

#import <Cocoa/Cocoa.h>


@interface Simple_iTunes : NSObject {
	
	NSStatusItem *statusItem;
	IBOutlet NSMenu *statusMenu;

}

@end

Simple iTunes.m

//
//  Simple iTunes.m
//  Simple iTunes
//
//  Created by Colt on 4/13/13.
//  Copyright 2013 __colt__. All rights reserved.
//

#import "Simple iTunes.h"


@implementation Simple_iTunes

-(void)awakeFromNib {
	
	statusItem = [[[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength] retain];
	
	[statusItem setHighlightMode:YES];
	[statusItem setTitle:@"iTunes"];
	[statusItem setMenu:statusMenu];
	
	[[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(updateTrackInfo:) name:@"com.apple.iTunes.playerInfo" object:nil];
	
	[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(iTunesTerminated:) name:NSWorkspaceDidTerminateApplicationNotification object:nil];

}

-(void)updateTrackInfo:(NSNotification *)notification {
	
	NSDictionary *information = [notification userInfo];
    
    NSLog(@"track information: %@", information);
	
	if ([information valueForKey:@"Display Line 2"]) {
		[statusItem setTitle: [NSString stringWithFormat:@"%@", [information valueForKey:@"Display Line 1"]]];
		
}
	
	if ([information valueForKey:@"Artist"] &&
        [information valueForKey:@"Name"]) {
        [statusItem setTitle: [NSString stringWithFormat:@"%@ - %@", [information valueForKey:@"Name"], [information valueForKey:@"Artist"]]];
		
}}

-(void)iTunesTerminated:(NSNotification *)notification {
	
    NSRunningApplication *runApp = [[notification userInfo] valueForKey:@"NSWorkspaceApplicationKey"];
    
	if ([runApp.bundleIdentifier isEqualToString:@"com.apple.iTunes"]) {
		[statusItem setTitle:@"iTunes"];
	
}}

-(void)dealloc {
	
    [statusItem release];
	[super dealloc];

}

@end

Simple_iTunes_Prefix.pch

//
// Prefix header for all source files of the 'Simple iTunes' target in the 'Simple iTunes' project
//

#ifdef __OBJC__
    #import <Cocoa/Cocoa.h>
#endif

Simple_iTunesAppDelegate.h

//
//  Simple_iTunesAppDelegate.h
//  Simple iTunes
//
//  Created by Colt on 4/13/13.
//  Copyright 2013 __colt__. All rights reserved.
//

#import <Cocoa/Cocoa.h>

@interface Simple_iTunesAppDelegate : NSObject <NSApplicationDelegate> {
    NSWindow *window;
}

@property (assign) IBOutlet NSWindow *window;

@end

Simple_iTunesAppDelegate.m

//
//  Simple_iTunesAppDelegate.m
//  Simple iTunes
//
//  Created by Colt on 4/13/13.
//  Copyright 2013 __colt__. All rights reserved.
//

#import "Simple_iTunesAppDelegate.h"

@implementation Simple_iTunesAppDelegate

@synthesize window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
	// Insert code here to initialize your application 
}

@end