Question

I’m having trouble with presentViewController method and its last parameter.

[self presentViewController:navigationController animated:YES completion:nil];

I’m new in objective-c syntax and can’t find out what object should I pass to ‘completion’ parameter. (also didn’t find any examples that use it)

I want to have callback method when my presented View Controller dismisses.

Thanks,

Milos

Answer 1

That’s a place for a block.

The completion handler is called after the viewDidAppear: method is
called on the presented view controller.

For operations on dismissal you could place your code in the viewWillDisappear: or viewDidDisappear: method.