Implement properties using associated objects

gistfile1.m

@implementation UIViewController (RBPopoverPrivate)


- (UIPopoverController *)hiddenPopoverController {
    return objc_getAssociatedObject(self, HiddenPopoverControllerKey);
}
- (void)setHiddenPopoverController:(UIPopoverController *)hiddenPopoverController {
    objc_setAssociatedObject(self, HiddenPopoverControllerKey, hiddenPopoverController, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


- (UIViewController *)hiddenPopoverContent {
    return objc_getAssociatedObject(self, HiddenPopoverContentKey);
}
- (void)setHiddenPopoverContent:(UIViewController *)hiddenPopoverContent {
    objc_setAssociatedObject(self, HiddenPopoverContentKey, hiddenPopoverContent, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

// plus many more ...

@end