I have a bunch of subViews in my ViewController.
In the last layer I have a UIView, and from this view I want to call superview and go up until I find the UIView that belongs to my ViewController.
Is it possible to find out whether a UIView belongs to a ViewController or not?
UIView *someView = self.superView; while (true) { if (someView BELONGS TO VIEWCONTROLLER) { // Now we know this view belongs to a VIewController break; } someView = someView.superView; } If you want to find out if a certain view is in the hierarchy managed by a view controller and you have a pointer to the view controller:
BOOL belongsToController = [aView isDescendantOfView:viewController.view]; Alternatively, if you want to find out if a certain view is the root of the hierarchy managed by the view controller but you don't have a pointer to the view controller, you can traverse the responder chain. According to the UIResponder's nextResponder documentation:
UIViewimplements this method by returning theUIViewControllerobject that manages it (if it has one) or its superview (if it doesn’t)
Therefore, if the next responder of a certain view is a UIViewController, that view must be the view associated with the view controller.
if ([[aView nextResponder] isKindOfClass:[UIViewController class]]) { // aView is the root of the view hierarchy managed by the view controller } Vlad's and albertamg's approaches are correct as well. However you can also traverse the responder chain
for (UIView* next = [self superview]; next; next = next.superview) { UIResponder* nextResponder = [next nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) { UIViewController *theControllerThatYouWANT = (UIViewController*)nextResponder; } } try going up in the hierarchy of views and check if current view object is the same as your controller's view
Code would be something like this: (wrote in textEdit, don't have dev tools here, sorry if any mistakes)
-(BOOL)view:(UIView *)aView belongsToController:(UIViewController *)viewController { BOOL belongsToController = NO; UIView *someView = [aView superView]; while (someView != nil) { if (viewController.view == someView) { belongsToController = YES; } someView = [someView superView]; } return belongsToController; } just tested it and it works for me. I hope it was helpfull. Vlad
