UIRotationGestureRecognizer Not working (Pinch / Rotate ) Obj-C [duplicate] - ios

Question

This question already has an answer here:
Handling Multiple GestureRecognizers
(1 answer)
Closed last year.
I can select the image, however the rotate/pinch functions are not working, this is the code;
in my viewDidLoad I init like;
[self initSingleTouchGesturesOnView: self.gestureView];
[self initMultiTouchGesturesOnView: self.gestureView];
Those methods are;
-(void) initSingleTouchGesturesOnView: (UIView *) targetView {
//Pan
bool found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIPanGestureRecognizer class]])
found = TRUE;
if (!found) {
UIPanGestureRecognizer *panRecognizer = [[[UIPanGestureRecognizer alloc] initWithTarget: self action: #selector(pan:)] autorelease];
[panRecognizer setDelegate: self];
[targetView addGestureRecognizer: panRecognizer];
}
}
-(void) initMultiTouchGesturesOnView: (UIView *) targetView {
//Pinch
bool found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIPinchGestureRecognizer class]])
found = TRUE;
if (!found) {
UIPinchGestureRecognizer *pinchRecognizer = [[[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(scale:)] autorelease];
[pinchRecognizer setDelegate:self];
[targetView addGestureRecognizer:pinchRecognizer];
}
//Rotate
found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIRotationGestureRecognizer class]])
found = TRUE;
if (!found) {
UIRotationGestureRecognizer *rotationRecognizer = [[[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotate:)] autorelease];
[rotationRecognizer setDelegate:self];
[targetView addGestureRecognizer:rotationRecognizer];
}
}
For the gestures themselves;
#pragma mark - GestureDelegate
-(void)pan:(id)sender {
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView: self.gestureView];
if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
self.currentFaceView.dragFirstX = [self.currentFaceView center].x;
self.currentFaceView.dragFirstY = [self.currentFaceView center].y;
}
translatedPoint = CGPointMake(self.currentFaceView.dragFirstX+translatedPoint.x, self.currentFaceView.dragFirstY+translatedPoint.y);
[self.currentFaceView setCenter:translatedPoint];
}
-(void)scale:(id)sender {
if([(UIPinchGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
self.currentFaceView.dragLastScale = 1.0;
return;
}
CGFloat scale = 1.0 - (self.currentFaceView.dragLastScale - [(UIPinchGestureRecognizer*)sender scale]);
CGAffineTransform currentTransform = self.currentFaceView.transform;
CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale);
[self.currentFaceView setTransform:newTransform];
self.currentFaceView.dragLastScale = [(UIPinchGestureRecognizer*)sender scale];
}
-(void)rotate:(id)sender {
if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
self.currentFaceView.dragLastRotation = 0.0;
return;
}
CGFloat rotation = 0.0 - (self.currentFaceView.dragLastRotation - [(UIRotationGestureRecognizer*)sender rotation]);
CGAffineTransform currentTransform = self.currentFaceView.transform;
CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
[self.currentFaceView setTransform:newTransform];
self.currentFaceView.dragLastRotation = [(UIRotationGestureRecognizer*)sender rotation];
}
I also use;
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]];
}
But they do not seem to respond, no matter what, it's almost like when I am trying a gesture such as pinch, the screen 'taps' away, like I have lifted my fingers off without having done so.

Answer 1

So the solution in my case was actually changing this part of the code;
It now works perfectly.
-(void) initSingleTouchGesturesOnView: (UIView *) targetView {
//Pinch
bool found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIPinchGestureRecognizer class]])
found = TRUE;
if (!found) {
UIPinchGestureRecognizer *pinchRecognizer = [[[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(scale:)] autorelease];
[pinchRecognizer setDelegate:self];
[targetView addGestureRecognizer:pinchRecognizer];
}
//Rotate
found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIRotationGestureRecognizer class]])
found = TRUE;
if (!found) {
UIRotationGestureRecognizer *rotationRecognizer = [[[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotate:)] autorelease];
[rotationRecognizer setDelegate:self];
[targetView addGestureRecognizer:rotationRecognizer];
}
found = FALSE;
for (UIGestureRecognizer *recognizer in targetView.gestureRecognizers)
if ([recognizer isKindOfClass: [UIPanGestureRecognizer class]])
found = TRUE;
if (!found) {
UIPanGestureRecognizer *panRecognizer = [[[UIPanGestureRecognizer alloc] initWithTarget: self action: #selector(pan:)] autorelease];
[panRecognizer setDelegate: self];
[targetView addGestureRecognizer: panRecognizer];
}
}