Take images created in Dashcode and prepare them for iPhone or iPad SDK UIButtons

ButtonStyling.h

//
//  ButtonStyling.h
//
//  Created by Ian Levesque on 3/29/10.
// 

#import <UIKit/UIKit.h>

@interface UIImage(ButtonStyling)

+ (UIImage *) buttonImageNamed:(NSString *)buttonPrefix;
+ (UIImage *) buttonClickedImageNamed:(NSString *)buttonPrefix;

@end

ButtonStyling.m

//
//  ButtonStyling.m
//
//  Created by Ian Levesque on 3/29/10.
//

#import "ButtonStyling.h"

static UIImage * ConcatenateButtonImages(UIImage *leftImage, UIImage *middleImage, UIImage *rightImage) {
	UIGraphicsBeginImageContext(CGSizeMake([leftImage size].width + [middleImage size].width + [rightImage size].width, 
										   [leftImage size].height));
	
	[leftImage drawInRect:CGRectMake(0, 0, [leftImage size].width, [leftImage size].height)];
	
	[middleImage drawInRect:CGRectMake([leftImage size].width, 0, 
									 [middleImage size].width, [leftImage size].height)];
	
	[rightImage drawInRect:CGRectMake([leftImage size].width + [middleImage size].width, 0, 
									 [rightImage size].width, [leftImage size].height)];
	
	UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();	
	
	return [newImage stretchableImageWithLeftCapWidth:[leftImage size].width topCapHeight:0];	
}

@implementation UIImage(ButtonStyling)

+ (UIImage *) buttonImageNamed:(NSString *)buttonPrefix {
	UIImage *leftImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_left"]];
	UIImage *middleImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_middle"]];
	UIImage *rightImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_right"]];
	
	return ConcatenateButtonImages(leftImage, middleImage, rightImage);
}

+ (UIImage *) buttonClickedImageNamed:(NSString *)buttonPrefix {
	UIImage *leftImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_left_clicked"]];
	UIImage *middleImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_middle_clicked"]];
	UIImage *rightImage = [UIImage imageNamed:[buttonPrefix stringByAppendingString:@"_right_clicked"]];
	
	return ConcatenateButtonImages(leftImage, middleImage, rightImage);
}

@end