How to use Gestures on the iPhone

UIGestures recognizer is an abstract base class for concrete gesture – recognizer classes.

    A gestures- recognizer object (or, simply, a gesture recognizer) de couples the logic for recognizing a gesture and acting on that recognition.

     When one of these objects recognizes a common gesture or in same classes, a change in the gesture, it sends an action message to each designated target object

The concrete sub classes are of the following:

A:   UITapGestureRecognizer

B:   UIRotationGestureRecognizer

C:   UISwpieGestureRecognizer

D:   UIPanGestureRecognizer

E:   UILongpressGestureRecognizer.

-(void) viewDidload

{

// for tapping

UITapGestureRecognizer     *recognizer  =

[[ UITapGestureRecognizer alloc] initWithTarget: self

Action:@ selector (gesture action)];

[ self view addGestureRecognizer: recognizer];

[ recognizer release];

// for longPress:

UIlongPressGestureRecognizer    * LongPress  =

[[ UILongPressGestureRecognizer alloc] initWithTarget: self

Action : @ Selector  ( gestureAction)];

[ self view addGestureRecognize  :   long press];

[ long press release];

// for swipe left:

UISwipeGestureRecognizer       * swipe1=

[[UISwipeGestureRecognizer  alloc] initWithTarget : self

Action  : @ Selector   ( gesture Action left];

[Swipe1 setDirection : UISwipeGestureRecognizer. Direction left]

[ img view addGestureRecognizer   :  Swipe1];

[  Swipe1 release];

// for SwipeRight:

UISwipeGestureRecognizer          *Swipe r  =

[   UISwipe GestureRecognizer alloc]  initWith target  : self action:@  selector  (gestureActionRight)];

[ Swipe setDirection : UISwipeGesturRecognizerDirectionRight];

[  img view  addGestureRecognizer: swipe];

[  swipe r  release];

// for swipe up:

UISwipeGestureRecognizer          *swipe u  =

[[ UI SwipeGestureRecognizer alloc] init withTarget : self

action : @ Selector (gesture Action up)];

[SwipeU setDirection: UISwipeGestureRecognizerDirectionup];

[  imgview  addGestureRecognizer : SwipeU];

[ swipe u release];

// for swipe down:

UISwipeGestureRecognizer         *swipe D=

[[ UISwipeGestureRecognizer alloc]  initWith target:  self

action  :@ Selector   (gesture  ActionDown)];

[ SwipeD   setDirection : UISwipeGestureRecognizerDirectionDown];

[  img view addGestureRecognizer:  swipe];

[   swipeD release];

-(void) gestureAction Left

{

NSLog (  @   “  view Swiped to Left”);

}

-( void) gestureActionRight

{

NSLog  (  @   “  view Swiped to Right”);

}

-(void) gestureActionup

{

NSLog (@ “view Swiped to up”);

}

-(void) gestureActionDowns

{

NSLog (@ “view Swiped to Down”);

}

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