Xcode6: IBDesignable and IBInspectable with Objective-C

I have an Objective-C UI component that I'd like to make inspectable in Interface Builder with Xcode 6. Swift has the `@IBDesignable` and `@IBInspectable` declaration attributes. Are they available also in Objective-C? How are they used?

Code example:

#import <UIKit/UIKit.h>
IB_DESIGNABLE
@interface LOLView : UIView
@property (nonatomic) IBInspectable UIColor *someColor;
@end

The equivalents are IB_DESIGNABLE and IBInspectable—see [the documentation for Objective C examples](

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).

Also, this year's WWDC video "What's New in Interface Builder" has its examples in Swift, but the presenter also mentions the Objective C equivalents in passing.