I have a Storyboard setup with a UIViewController
with an container view so that I can embed another UIViewController
inside of it.
In a certain scenario I need to change the embedded view controller. In my storyboard I cannot have two segues from my container view (only a single embed segue). Which leads me to doing it programatically.
I have my container view in my storyboard with no connected embed segue.
Now from this point, how can I programmatically embed my chosen UIViewController
object?
You can do this by programmatically, below is the method which will take a bool value to make decision which view controller need to be added in container view and then will instantiate an object and after that will add it to containerView
- (void)addViewControllerToContainerView:(BOOL)addVC1
{
// Get storyboard
UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"<name of storyboard>" bundle:[NSBundle mainBundle]];
UIViewController *viewController = nil;
if (addVC1)
{
// get viewController with identifier
viewController = [storyBoard instantiateViewControllerWithIdentifier:@"<View Controller 1 Identifier>"];
}
else
{
viewController = [storyBoard instantiateViewControllerWithIdentifier:@"<View Controller 2 Identifier>"];
}
// lets add it to container view
[viewController willMoveToParentViewController:self];
[self.view addSubview:viewController.view];
[self addChildViewController:viewController];
[viewController didMoveToParentViewController:self];
// keep reference of viewController which may be useful when you need to remove it from container view, lets consider you have a property name as containerViewController
self.containerViewController = viewController;
}
When you need remove view controller from container view controller you can do this
[self.containerViewController willMoveToParentViewController:nil]; // 1
self.containerViewController.view removeFromSuperView];
[self.containerViewController removeFromParentViewController];//this line is updated as view is removed from parent view cotnroller istead of its viewcontroller is removed from parentViewController
self.containerViewController = nil
Apple docs about container view controllers