UIView. How Do I Find the Root SuperView Fast?

ios uiview subview superview
dugla picture dugla · May 29, 2011 · Viewed 15.5k times · Source

I have a random child view in a view hierarchy. What is the best/fastest/cleverest way to get to the root superview?

Cheers,
Doug

Answer

Scott Forbes picture Scott Forbes · May 29, 2011

If your app only has one UIWindow (usually true), and if that window's only subview is your root controller's view (also usually true):

[randomChildView.window.subviews objectAtIndex:0]

Or you could recursively climb out of the hierarchy, by checking view.superview until you find a view whose superview is nil.

Related questions

Bringing a subview to be in front of all other views

I am working on integrating an ad provider into my app currently. I wish to place a fading message in front of the ad when the ad displays but have been completely unsuccessful. I made a function which adds a …

Read More
How to list out all the subviews in a uiviewcontroller in iOS?

I want to list out all the subviews in a UIViewController. I tried self.view.subviews, but not all of the subviews are listed out, for instance, the subviews in the UITableViewCell are not found. Any idea?

Read More
What is the correct way to remove a subview from a view hierarchy and nuke it?

I have a parent UIView with a number of subviews. Periodically I need to remove a subview and completely remove it from the system. What is the correct way to do this? I tried this: UIView *v = [self.containerView viewWithTag:[…

Read More