在什么时候将自动布局约束应用于视图？

Question

Is there any delegate or a callback to be called when autolayout constraints are added to a view and the view has been resized?

In my view hierarchy ( NSStackView<--MyContainerView<--MyView ) when i add MyView, I add it to the special ContainerViewController 's view as a subview and apply constraints to it - it should fill all the area defined by ContainerViewController 's view.

The code looks like this:

-(void)addView:(MyView*)view
{
   ContainerViewController *vc = [[ContainerViewController alloc] init];
   [vc addContentView: view]; // autolayout constraints are applied inside like "H:|[view]|" and "V:|[view]|"
   [self.stackView addView: vc.view];
}

however, after returning from addView , view's frame is still {0,0,0,0} .
How can I catch the moment when view is resized appropriately?

Answer 1

Not quite sure what you're after -

but if you want to be informed when the view's frame changes you can listen to the NSViewBoundsDidChangeNotification :

NSView Notifications

Make sure to read the comments about how to control the enablement of this notification.