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	NSString *myString = @"NSString Is A Test for NSRegularExpression";
	
	NSError *error = NULL;
	NSRegularExpression *regex = [NSRegularExpression         
								  regularExpressionWithPattern:@"(NS|UI)+(\w+)"
								  options:NSRegularExpressionCaseInsensitive
								  error:&error];
	[regex enumerateMatchesInString:myString options:0 range:NSMakeRange(0, [myString length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){
		NSLog(@"Text Range %@", match.range);
		NSLog(@"Text %@", [myString substringWithRange:match.range]);

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- (IBAction)add:(id)sender {
	UIButton *sampleButton = [[UIButton alloc] initWithFrame:CGRectMake(50.0f, 50.0f, 100.0f, 46.0f)];
	UIImage *backgroundImage = [[UIImage imageNamed:@"redButton.png"] stretchableImageWithLeftCapWidth:11.0 topCapHeight:0.0];
	[sampleButton setBackgroundImage:backgroundImage forState:UIControlStateNormal];

	[self.view addSubview:sampleButton];
}

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- (id)initWithFrame:(CGRect)frame {
    if ((self = [super initWithFrame:frame])) {
        [self setBackgroundImage:[UIImage imageWithContentsOfFile: [[NSBundle mainBundle] 
																	pathForResource:@"TransparentButtonFillN" 
																	ofType:@"png"]] 
						forState:UIControlStateNormal];
    }
    return self;
}

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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	NSLog(@"touchDown");
	UITouch *touch = [touches anyObject];
	UIView *aView = [self.view viewWithTag:1]; 
	firstTouch = [touch locationInView:self.view];
	if (CGRectContainsPoint(aView.frame, firstTouch)) {
		butContains = YES;
		NSLog(@"butContains = %d", butContains);
	}
}

SquaredTiki

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	NSLog(@"touchDown");
	UITouch *touch = [touches anyObject];
	firstTouch = [touch locationInView:self.view];
}


- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
	NSArray *array = [touches allObjects];
	UITouch *specificTouch = [array objectAtIndex:0];

SquaredTiki

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	NSLog(@"touchDown");
	UITouch *touch = [touches anyObject];
	firstTouch = [touch locationInView:self.view];
	lastTouch = [touch locationInView:self.view];
	[self.view setNeedsDisplay];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *touch = [touches anyObject];

SquaredTiki

NSNotificationCenter *nc;
nc = [NSNotificationCenter defaultCenter];
[nc removeObserver:self
name:NSManagedObjectContextObjectsDidChangeNotification
object:nil];
NSManagedObjectContext *moc = [self managedObjectContext];
[syncButton setTitle:@"Syncing..."];
NSString *dateText = (@"Last Sync : %d", [NSDate date]);
[syncDate setStringValue:dateText];
NSEntityDescription *entityDescription = [NSEntityDescription

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- (void)awakeFromNib {
	NSNotificationCenter *nc;
	nc = [NSNotificationCenter defaultCenter];
	
	[nc addObserver:self
		   selector:@selector(syncKVO:)
			   name:NSManagedObjectContextObjectsDidChangeNotification
			 object:nil];
}

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- (void)syncKVO:(NSNotification *)notification {
    NSDictionary *userInfoDictionary = [notification userInfo];
    NSSet *deletedObjects = [userInfoDictionary objectForKey:NSDeletedObjectsKey];
    NSSet *changedObjects = [userInfoDictionary objectForKey:NSUpdatedObjectsKey];

    if ([deletedObjects count]) {
          //do something if it contains objects
    } else {
          if ([changedObjects count]) {
               //do something if it contains objects

SquaredTiki

// Code in App Delegate. 

- (void) awakeFromNib {
NSNotificationCenter *nc;
nc = [NSNotificationCenter defaultCenter];
       
[nc addObserver:self
       selector:@selector(syncKVO:)
           name:NSManagedObjectContextObjectsDidChangeNotification
         object:nil];