Accessing default view from a UIBarButtonItem

viewFromBarButtonItem.m

/*
UIBarButtonItem does not subclass UIView.
However, there is a way to access the UIBarButtonItem's default view without breaching 
Apple's 'Do not use private APIs' rule.
That's because said view responds to KVO, such as changing the tint-color.  
*/

/*
 After setting your UIBarButton item inside the UINavigationBar object or UIToolBar object, 
 access your view in the following fashion:
*/
UIView *view = [self.navigationItem.rightBarButtonItem valueForKey:@"view"]; // My UIBarButtonItem was previously set to the rightBarbuttonItem of a UINavigationBar/UINavigationController.

// As a check, do the following to find out if you get an object back:
NSLog(@"%@", NSStringFromClass([[self.navigationItem.rightBarButtonItem valueForKey:@"view"] class]));

/*
You'll find out that your view is actually an instance or UINavigationButton, 
which subclasses UIButton, which itself subclasses UIView.

Now, just to double check to see if it subclasses UIView, do the following:
*/
NSLog(@"%d", [[self.navigationItem.rightBarButtonItem valueForKey:@"view"] isKindOfClass:[UIView class]]);

// So, to edit the exclusiveTouch property, do the following:
UIView *view = [self.navigationItem.rightBarButtonItem valueForKey:@"view"];
view.exclusiveTouch = YES;