Inserting child controllers in the Auto-Layout world.

gistfile1.m

//	##	inserting. this can be done in viewDidLoad
//	this can be any view, here I'm adding to main view
UIView *containerView = self.view;
//	load child controller
UIViewController *svc = [[UIViewController alloc] initWithNibName:nil bundle:nil];
//	kill the randomness
svc.view.translatesAutoresizingMaskIntoConstraints = NO;
//	add child VC to hierarchy
[self addChildViewController:svc];
//	set initial rect
svc.view.frame = containerView.bounds;
//	finally add the view
[containerView addSubview:svc.view];
//	now that child view is in, set constraints, as needed
NSDictionary *vd = @{@"svc" : svc.view};
[containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-0-[svc]-0-|" options:0 metrics:nil views:vd]];
[containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[svc]-0-|" options:0 metrics:nil views:vd]];
//	bring subview to front, or where needed
[containerView bringSubviewToFront:svc.view];
//	finish up
[svc didMoveToParentViewController:self];



//	##	removing, same as before
[svc willMoveToParentViewController:nil];
[svc.view removeFromSuperview];
[svc removeFromParentViewController];

I don't think you need to set the frame of the view, that is not a recommended practice for auto-layouts anyway