UIImage+Resizing.h

#import <UIKit/UIKit.h>


@interface UIImage (Resizing)

- (UIImage*)scaleToSize:(CGSize)size;

@end

UIImage+Resizing.m

#import "UIImage+Resizing.h"

@implementation UIImage (Resizing)

- (UIImage*)scaleToSize:(CGSize)size {
	
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
	if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
		UIGraphicsBeginImageContextWithOptions(size, NO, [[UIScreen mainScreen] scale]);
	} else {
		UIGraphicsBeginImageContext(size);
	}
#else
	UIGraphicsBeginImageContext(size);
#endif

	[self drawInRect:CGRectMake(0.0f, 0.0f, size.width, size.height)];
	UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();

	return scaledImage;
}

@end