Calling method in parent UIViewController, after adding by addSubview

I have a UIViewController that is creating another view controller, and adding its view as a subview:

In the parent UIViewController:

SlateMoreView* subView = [[SlateMoreView alloc] initWithNibName:@"SlateMoreView" bundle:nil];
[self.view addSubview:subView.view];

I then need to call a method from the subview, in the parent view.

I have seen how to do this when I am adding the sub UIViewController using [self.navigationController pushViewController: subView animated: YES], because I can find the parent using this kind of code:

In the sub view UIViewController:

NSArray* viewControllerA开发者_如何学Pythonrray = [self.navigationController viewControllers]
int parentViewControllerIndex = [viewControllerArray count] - 2;
SlateView* slateView = [viewControllerArray objectAtIndex:parentViewControllerIndex];

...and then I can send messages to it. But since I added the sub view manually by using addSubView, I can't do this.

Can anyone think of how I can talk to my parent UIViewController?

Thanks!

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UIViews have a superview property which seems to be what you are looking for.

In addition you probably don't want to nest UIViewController's view like that unless you are very deliberately building a custom contain view controller. See http://blog.carbonfive.com/2011/03/09/abusing-uiviewcontrollers/

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You might want to consider if your problem can be solved by using NSNotifications. You could post a notification from your subview when an event happens that interested listeners (your superview) need to know about . When the superview receives the notification, it can run whatever code you wish. All the while the subview never needs to know about the superview.

This is one way to make your classes less dependant on each other.

You could also use delegation as another option.

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When you add your view as a subview to a view hierarchy, you put it in the responder chain. You can go up the responder chain to reach the view controller as a UIView controlled by a UIViewController has the UIViewController as its nextResponder.

id object = theSubview;
do {
    object = [object nextResponder];
} while ( ![object isMemberOfClass:[YourViewController class]] );

// object has the view controller you need.