Useful when sending notifications from a worker queue.

NSNotificationCenter+GCD.h

//
//  NSNotificationCenter+GCD.h
//
//  Created by Maksym Huk on 10/30/12.
//  Copyright (c) 2012 Maksym Huk. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSNotificationCenter (GCD)

- (void)postNotificationOnMainQueueName:(NSString *)aName object:(id)anObject;
- (void)postNotificationOnMainQueueName:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo;

@end

NSNotificationCenter+GCD.m

//
//  NSNotificationCenter+GCD.m
//
//  Created by Maksym Huk on 10/30/12.
//  Copyright (c) 2012 Maksym Huk. All rights reserved.
//

#import "NSNotificationCenter+GCD.h"

@implementation NSNotificationCenter (GCD)

- (void)postNotificationOnMainQueueName:(NSString *)aName object:(id)anObject
{
    dispatch_async(dispatch_get_main_queue(), ^{
        [self postNotificationName:aName object:anObject];
    });
}

- (void)postNotificationOnMainQueueName:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo
{
    dispatch_async(dispatch_get_main_queue(), ^{
        [self postNotificationName:aName object:anObject userInfo:aUserInfo];
    });
}

@end