Tired of the UIViewController containment three-step. Adds a convenience param if the destination superview is not actually the parent VC's main view.

UIViewController+BHSContainment.m

@implementation UIViewController (BHSContainment)


- (void)bhs_addChildViewController:(UIViewController *)child {
    [self bhs_addChildViewController:child superview:self.view];
}

// Note this potentially forces view loads on both parent and child
// Not a problem if used in -viewDidLoad or later
// Use superview parameter with care. If it's not within the parent VC's hierarchy, you deserve to lose
- (void)bhs_addChildViewController:(UIViewController *)child superview:(UIView *)superview {
    if (superview == nil) {
        superview = self.view;
    }

    [self addChildViewController:child];
    [superview addSubview:child.view];
    [child didMoveToParentViewController:self];
}

- (void)bhs_removeChildViewController:(UIViewController *)child {
    [child willMoveToParentViewController:nil];
    if ([child isViewLoaded]) {
        [child.view removeFromSuperview];
    }
    [child removeFromParentViewController];
}


@end