- (void) touchesBegan:(NSSet *) touches withEvent: (UIEvent *) event
- (void) touchesMoved:(NSSet *) touches withEvent: (UIEvent *) event
- (void) touchesEnded:(NSSet *) touches withEvent: (UIEvent *) event
을 이용하여 인식을 한다.
- (void) touchesBegan:(NSSet *) touches withEvent: (UIEvent *) event
{
finished = NO;
startPoint = [[touches anyObject] locationInView:self.view];
multitouch = (touches.count > 1);
pointCount = 1;
}
- (void) touchesMoved:(NSSet *) touches withEvent: (UIEvent *) event
{
pointCount++;
if (finished) return;
// Handle multitouch
if (touches.count > 1)
{
// get touches
UITouch *touch1 = [[touches allObjects] objectAtIndex:0];
UITouch *touch2 = [[touches allObjects] objectAtIndex:1];
// find current and previous points
CGPoint cpoint1 = [touch1 locationInView:self.view];
CGPoint ppoint1 = [touch1 previousLocationInView:self.view];
CGPoint cpoint2 = [touch2 locationInView:self.view];
CGPoint ppoint2 = [touch2 previousLocationInView:self.view];
// calculate distances between the points
CGFloat cdist = distance(cpoint1, cpoint2);
CGFloat pdist = distance(ppoint1, ppoint2);
multitouch = YES;
// The pinch has to exceed a minimum distance
if (ABS(cdist - pdist) < MIN_PINCH) return;
if (cdist < pdist)
touchtype = UITouchPinchIn;
else
touchtype = UITouchPinchOut;
finished = YES;
return;
}
else
{
// Check single touch for swipe
CGPoint cpoint = [[touches anyObject] locationInView:self.view];
float dx = DX(cpoint, startPoint);
float dy = DY(cpoint, startPoint);
multitouch = NO;
finished = YES;
if ((dx > SWIPE_DRAG_MIN) && (ABS(dy) < DRAGLIMIT_MAX)) // hswipe left
touchtype = UITouchSwipeLeft;
else if ((-dx > SWIPE_DRAG_MIN) && (ABS(dy) < DRAGLIMIT_MAX)) // hswipe right
touchtype = UITouchSwipeRight;
else if ((dy > SWIPE_DRAG_MIN) && (ABS(dx) < DRAGLIMIT_MAX)) // vswipe up
touchtype = UITouchSwipeUp;
else if ((-dy > SWIPE_DRAG_MIN) && (ABS(dx) < DRAGLIMIT_MAX)) // vswipe down
touchtype = UITouchSwipeDown;
else
finished = NO;
}
}
- (void) touchesEnded:(NSSet *) touches withEvent: (UIEvent *) event
{
// was not detected as a swipe
if (!finished && !multitouch)
{
// tap or double tap
if (pointCount < 3)
{
if ([[touches anyObject] tapCount] == 1)
touchtype = UITouchTap;
else
touchtype = UITouchDoubleTap;
}
else
touchtype = UITouchDrag;
}
// did points exceeded proper swipe?
if (finished && !multitouch)
{
if (pointCount > POINT_TOLERANCE) touchtype = UITouchDrag;
}
// Is this properly a tap/double tap?
if (multitouch || (touches.count > 1))
{
// tolerance is *very* high
if (pointCount < 10)
{
if ([[touches anyObject] tapCount] == 1)
touchtype = UITouchMultitouchTap;
else
touchtype = UITouchMultitouchDoubleTap;
}
}
NSString *whichItem = nil;
if (touchtype == UITouchUnknown) whichItem = @"Unknown";
else if (touchtype == UITouchTap) whichItem = @"Tap";
else if (touchtype == UITouchDoubleTap) whichItem = @"Double Tap";
else if (touchtype == UITouchDrag) whichItem = @"Drag";
else if (touchtype == UITouchMultitouchTap) whichItem = @"Multitouch Tap";
else if (touchtype == UITouchMultitouchDoubleTap) whichItem = @"Multitouch Double Tap";
else if (touchtype == UITouchSwipeLeft) whichItem = @"Swipe Left";
else if (touchtype == UITouchSwipeRight) whichItem = @"Swipe Right";
else if (touchtype == UITouchSwipeUp) whichItem = @"Swipe Up";
else if (touchtype == UITouchSwipeDown) whichItem = @"Swipe Down";
else if (touchtype == UITouchPinchIn) whichItem = @"Pinch In";
else if (touchtype == UITouchPinchOut) whichItem = @"Pinch Out";
//[self.vc performSelector:@selector(updateState:withPoints:) withObject:whichItem withObject:[NSNumber numberWithInt:pointCount]];
[self performSelector:@selector(updateState:pointCount:) withObject:whichItem withObject:[NSNumber numberWithInt:pointCount]];
}
-(void)updateState:(NSString*)state pointCount:(NSNumber*)count
{
NSString *outstring = [NSString stringWithFormat:@"state = %@, count = %d", state, [count intValue]];
UIAlertView *av = [[[UIAlertView alloc] initWithTitle:@"Gestures" message:outstring delegate:nil cancelButtonTitle:@"확인" otherButtonTitles:nil] autorelease];
[av show];
}
GestureRecognizerSample.zip
