Why I love Obj-C blocks

// This is why I love blocks.
//  I have an async protocol to add/write a file to disk. Here's the full implementation of one call.
//  It's so much easier than managing delegates, threads, callback objects and selectors.

- (void)addStoreItemWithType:(TAStoreItemType)type 
                  identifier:(NSString *)identifier
                  properties:(NSDictionary *)properties
             completionBlock:(void (^)(BOOL success, NSError *error))completionBlock {
    dispatch_async(fileio_queue_,
                   ^(void) {
                       NSError *error = nil;
                       BOOL success = [FileStore writeProperties:properties
                                                           toURL:[FileStore _urlForType:type identifier:identifier]
                                                           error:&error];
                       dispatch_async(dispatch_get_main_queue(), ^(void) { completionBlock(success, error); });
                   });
}