iOS Autolayout how to stretch out subview in superview - ios

Question

As you can see on the screenshot here is gray UIView which I use as a container. In the code I allocate a UINavigationController and add it's view as a subview to the gray container view. The UINavigationController has RootViewController (you can see the cut off table view on the left side - it is my root view controller of UINavigationController).
My question is how to pin all sides to the superview bounds. Because right now I just can see a part of the RootViewController view.
In the storyboard I have set all constraints as for gray container view as for RootViewController view of UINavigationController. If I normally PushViewController instead of adding as a subview it shows without cut off issue.
Here is a code I have in UIViewController that contains gray container view:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self)
{
KNCouponsViewController *couponsViewControllerByList = [KNInstantiateHelper instantiateViewControllerWithIdentifier:#"KNCouponsViewController"];
self.theNavigationController = [[UINavigationController alloc] initWithRootViewController:couponsViewControllerByList];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self.theContainerView addSubview:self.theNavigationController.view];
}
Here is constraints for the gray container view
Here is constraints for the view of root view controller which has cut off table:
Seems like a simple solution is to set UINavigationController view the same width and hight as the gray container has:
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect rect = self.theContainerView.frame;
rect.origin.x = 0;
rect.origin.y = 0;
[self.theNavigationController.view setFrame:rect];
[self.theContainerView addSubview:self.theNavigationController.view];
}
Then it works correct. But I think if we will not modify a frame only then it will work?

Answer 1

there are two ways.
1 way is to call addSubView code in viewDidLayoutSubview method
2nd way is to use following code for settings frame
[self.theContainerView addSubview:self.theNavigationController.view];
[self.theNavigationController.view setFrame: self.theContainerView.frame];
Note: If you use first way then add your code in
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[self.theContainerView addSubview:self.theNavigationController.view];
[self.containerView layoutIfNeeded];
});