You are trying to present a view controller from the rootViewController. In your case I think the rootViewController is not the current ViewController. Either you presented or pushed a new UIViewController on top of it. You should present a view controller from the top most view controller itself. You need to change: UIViewController *vc = … Read more
If you want to display the view hierarchy in lldb, you do not have to add any categories or bridging headers or anything like that. When debugging Objective-C code, one would generally use the following command at the (lldb) prompt: po [[UIWindow keyWindow] recursiveDescription] If, though, you’ve paused in a Swift frame, lldb may expect … Read more
For others who come here: I got this error, because I added the constraints before I added the subviews to the hierarchy.
You have to recursively iterate the sub views. – (void)listSubviewsOfView:(UIView *)view { // Get the subviews of the view NSArray *subviews = [view subviews]; for (UIView *subview in subviews) { // Do what you want to do with the subview NSLog(@”%@”, subview); // List the subviews of subview [self listSubviewsOfView:subview]; } }
I have modified the accepted answer’s code to be more generic – it handles the cases where the view does clip subviews to its bounds, may be hidden, and more importantly : if the subviews are complex view hierarchies, the correct subview will be returned. – (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { if (self.clipsToBounds) { return … Read more