Adding Properties to an Objective-C Category

Test.m

#import UIViewDHStyleManager.h"

UIView* v = [[[UIView alloc] init] autorelease];
v.styleName = @"someStyleName";
NSLog(@"v = %@",v.styleName); //Logs 'someStyleName'

UIViewDHStyleManager.h

@interface UIView (DHStyleManager)
@property (nonatomic, copy) NSString* styleName;

@end

UIViewDHStyleManager.m

#import "UIViewDHStyleManager.h"

NSString * const kDHStyleKey = @"kDHStyleKey";

@implementation UIView (DHStyleManager)

- (void)setStyleName:(NSString *)styleName
{
	objc_setAssociatedObject(self, kDHStyleKey, styleName, OBJC_ASSOCIATION_COPY);
}

- (NSString*)styleName
{
	return objc_getAssociatedObject(self, kDHStyleKey);
}

@end