If You know how it works, but still need a quick example, here it is! (it will become handy at least for me, when I will need copy-paste example, without trying remembering it)
UISwipeGestureRecognizer *mSwipeUpRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(doSomething)];
[mSwipeUpRecognizer setDirection:(UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight)];
[[self view] addGestureRecognizer:mSwipeUpRecognizer];
and in .h file add:
<UIGestureRecognizerDelegate>
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…