KVO - interface orientation property

Question

I'm trying to observe interface orientation by KVO of UIViewController from other object by this code :

[((UIViewController *)self.delegate) addObserver:self forKeyPath:@"interfaceOrientation" options:NSKeyValueObservingOptionNew context:NULL];

and implementing the function :

-(void)observeValueForKeyPath:(NSString*)keyPath ofObject:(id)object change:(NSDictionary*)change context:(void*)context 
{
 if ([keyPath isEqual:@"interfaceOrientation"]) 
  {
    // do something    
  }
}

The method is called only in the first time , although i can see that the property interfaceOrientation of the delegate change while i rotating the phone .

Why?

Please help !

Thanks!!!!

score 1 · Answer 1 · answered Mar 14 '13 at 20:27

1

Why are you doing this with KVO? UIViewControllers have built in support for this. Look at

  //iOS6 only
 - (BOOL)shouldAutomaticallyForwardRotationMethods
 {
    return YES;
 }

and also addChildViewController:

answered Mar 14 '13 at 20:27

Jack Freeman

1,414
11
18

1

if it is not a subview of the view of the view controller? it is a view that is a subview of the window. – Rivka Schwartz Mar 17 '13 at 11:04

KVO - interface orientation property

1 Answers1