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Ole Bjørn Setnes
Ole Bjørn Setnes

Reputation: 788

How to receive notification when an NSView is moved

How to receive a notification/callback when a NSView is moved - alternatively when a NSViewController is moved.

I see that there are methods for NSWindow (NSWindowDidMoveNotification) but I cannot find out how handle it with an NSView or NSViewController.

I understand that NSView has a NSWindow and that this is what has 'a coordinate' but I'm not sure how to subclass this NSWindow to overwrite the move method.

Upvotes: 1

Views: 671

Answers (1)

Ole Bjørn Setnes
Ole Bjørn Setnes

Reputation: 788

I found out. Add an observer like this:

[[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(frameDidChange:)
                                                name:NSViewFrameDidChangeNotification
                                              object:self.view];

And a selector like this:

- (void)frameDidChange:(NSNotification*)notification {

   NSView* view = [notification object];

   ...
}

Upvotes: 2

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