When a modal UIViewController is dismissed, Apple recommends to use the
delegate pattern to pass data back to the presenting UIViewController. I am
using that and it works just fine. But I was wondering if the same (passing
data back) can be achieved using the completion block. Right now, I just set it
to nil when showing and dismissing the modalVC:
[self presentViewController: modalVC animated: YES completion: nil];
and
[[self presentingViewController] dismissViewControllerAnimated: YES
completion: nil];
But even though it is often set to nil, that completion argument isn't there
for no reason. So, can it be used to pass values of settings back and forward
between the presentingVC and the modalVC? Or is that a misuse of the
completion block? And if so, what would be a use of the completion block when
presenting and dismissing view controllers?
Thanks,
- Koen.
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