iOS - Open/Show view swiping down from navigation bar

i would like to know if is possible open/show a new view swiping down ( or up ) from the navigation bar, just like the notification cente开发者_如何学编程r view in iOS 5 ( it appear from status bar, and i think this isn't possible for normal apps, right? ). Thanks :)

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You have to use UISwipeGestureRecognizer. Here's the code :

UISwipeGestureRecognizer *swipeUp=[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(youSelector:)];
[swipeUp setNumberOfTouchesRequired:2];
[swipeUp setDirection:UISwipeGestureRecognizerDirectionUp];
[yourView addGestureRecognizer:swipeUp];