Example Mac Notification code

AppDelegate.h

#import <Cocoa/Cocoa.h>

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

@property (assign) IBOutlet NSWindow *window;

@end

AppDelegate.m

#include <AudioToolbox/AudioToolbox.h>
#import "AppDelegate.h"

@implementation AppDelegate

@synthesize window;

- (void)downloadDataFromProvider
{
    // Connect to provider and download waiting data
    // Check in with provider when first launch and again when
    // a push notification is received
}

- (void)sendToProvider:(NSData *)message
{
    // Connect to provider and send to deviceToken
}

static void soundCompleted(SystemSoundID soundFileObject, void *clientData)
{
    // Clean up
    if(soundFileObject != kSystemSoundID_UserPreferredAlert) {
        AudioServicesDisposeSystemSoundID(soundFileObject);
    }
}

- (void)playNotificationSound:(NSDictionary *)apsDictionary
{
    // Implement preference sot aht user could specify if they want sounds/alerts
    // if(userEnabledSounds)

    NSString *soundName = (NSString *)[apsDictionary valueForKey:(id)@"sound"];
    if(soundName != nil) {
        SystemSoundID soundFileObject = kSystemSoundID_UserPreferredAlert;
        CFURLRef soundFileURLRef = NULL;

        if([soundname compare:@"default"] != NSOrderedSame) {
            CFBundleRef mainBundle = CFBundleGetMainBundle();

            // get url to sound file to play
            soundFileURLRef = CFBundleCopyResourceURL(mainBundle,
                                                      (CFStringRef) soundName,
                                                      NULL,
                                                      NULL);
            //Create a system sound object representing the file
            AudioServicesCreateSystemSoundID(soundFileURLRef, &soundFileObject);
            CFRelease(soundFileURLRef);
        }

        // Register a function to call when sound is done playing
        AudioServicesAddSystemSoundCompletion(soundFileObject, NULL, NULL, soundCompleted, NULL);

        // Play the sound
        AudioServicesPlaySystemSound(soundFileObject);
    }
}

- (void)badgeApplicationIcon:(NSDictinoary *)apsDictionary
{
    id badge = [apsDictionary valueForKey:@"badge"];
    NSDockTile *dockTile = [NSApp dockTile];

    if(badge != nil) {
        NSString *label = [NSSrting stringWithFormat:@"%@", badge];
        [dockTile setBadgeLabel: label];
    }
    else {
        [dockTile setBadgeLabel:nil];
    }
}

- (void)showNotificationAlert:(NSDictionary *) apsDictionary
{
    // Implement pref whether user want sound/alerts
    // if(userEnabledAlerts)

    // Only handle the simple case of alert property contaning string value
    NSString *message = (NSString *)[apsDictionary valueForKey:(id)@"alert"];

    NSAlert *alert = [[NSAlert alloc] init];
    [alert addButtonWithTitle:@"OK"];
    [alert setMessageText:message];
    [alert setAlertStyle:NSInformationAlertStyle];

    if([alert runModal] == NSAlertFirstButtonReturn) {
        // Processing when OK button is clicked.
    }

    [alert release];
}

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Code to initialize application

    NSLog(@"%@", NSStringFromSleector(_cmd));

    // Register for push notification
    [NSApp registerForRemoteNotificationTypes:NSRemoteNotificationTypeBadge];

    NSString *name = [aNotification name];
    NSLog(@"didFinishLaunchingWithOptions: notification name %@", name);

    // Contact the provider and download the latest data
    [self downloadDataFromProvider];

    // items downloaded, reset icon badge. Assumes badge is showing number
    // if new items not yet downloaded
    // If you are not using badge to show number of unread items, don't reset badge here
    [[NSApp dockTile] setBadgeLabel:nil];
}

- (void)application:(NSApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
    NSLog(@"%@ with error = %@", NSStringFromSelector(_cmd), error);
}

- (void)application:(NSApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    NSLog(@"%@", NSStringFromSelector(_cmd));

    NSDictionary *apsDictionary = [userInfo valueForKey:@"aps"];

    if(apsDictionary != nil) {
        // A notification arrived while the app is frontmost.
        // play the sound
        [self playNotificationSound:apsDictionary];

        // Badge the icon
        [self badgeApplicationIcon:apsDictionary];

        // Show the alert
        [self showNotificationAlert:apsDictionary];

        // Get updated content from provider
        [self downloadDataFromProvider];
    }
}

@end

notification.m

#import <Cocoa/Cocoa.h>

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