Recognize user cut/swipe gesture (UISwipeGestureRecognizer) - iphone

Question

I use below code and work for 'self.view' but doesn't work for imageview and for direction just can add one direction how to use four direction(right,left,uo,down)?
UISwipeGestureRecognizer *swipe =[[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:#selector(sr)];
swipe.direction =UISwipeGestureRecognizerDirectionRight;
[imageview addGestureRecognizer:swipe];
[swipe release];

Answer 1

Delegates
touchesBegan:
touchesEnded:

Answer 2

//--------add this code in the imageview allocation-------//
imageview.userInteractionEnabled = YES;
for four direction you have to use two UISwipeGestureRecognizer:-
UISwipeGestureRecognizer *swipeRightLeft =[[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:#selector(sr)];
[swipeRightLeft setDirection:(UISwipeGestureRecognizerDirectionRight |UISwipeGestureRecognizerDirectionLeft )];
[imageview addGestureRecognizer:swipeRightLeft];
[swipeRightLeft release];
UISwipeGestureRecognizer *swipeUpDown =[[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:#selector(sr)];
[swipeUpDown setDirection:(UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown )];
[imageview addGestureRecognizer:swipeUpDown];
[swipeUpDown release];

Answer 3

Try enabling interaction:
yourImageView.userInteractionEnabled = YES;
and add some directions, something like this:
swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft;

Answer 4

If you are OK with your app only running on iOS 3.2+, the best way to do this is to use the UIGestureRecognizer API class. In fact, there is a UISwipeGestureRecognizer subclass (docs are here).
To do what you want, do something like this:
UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(doSomething:)];
swipe.direction = UISwipeGestureRecognizerDirectionRight;
[yourImageView addGestureRecognizer:swipe];
[swipe release];
To change to any other direction, look at the docs link above - there is a constant with all four directions.