Using Pan, Pinch and Rotation gestures

UIPanPinchRotationGesture.m

-(void)addGesture
{
    //: 드래그
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)];
    pan.minimumNumberOfTouches = 1;
    pan.maximumNumberOfTouches = 1;
    [someView addGestureRecognizer:pan];
    
    //: 핀치
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];
    pinch.delegate = self;
    [someView addGestureRecognizer:pinch];
    
    //: 회전
    UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotateGesture:)];
    rotate.delegate = self;
    [someView addGestureRecognizer:rotate];
}

-(void)handlePanGesture:(UIGestureRecognizer *)recognizer
{
    UIPanGestureRecognizer *pan = (UIPanGestureRecognizer*)recognizer;
    CGPoint delta = [pan translationInView:pan.view];
    [someView setCenter:CGPointMake(someView.center.x + delta.x, someView.center.y + delta.y)];
    [pan setTranslation:CGPointZero inView:someView];
}

-(void)handlePinchGesture:(UIGestureRecognizer *)recognizer
{
    static CGRect initialBounds;
    
    if (recognizer.state == UIGestureRecognizerStateBegan)
    {
        initialBounds = someView.bounds;
    }
    CGFloat factor = [(UIPinchGestureRecognizer *)recognizer scale];
    
    CGAffineTransform zoom = CGAffineTransformScale(CGAffineTransformIdentity, factor, factor);
    someView.bounds = CGRectApplyAffineTransform(initialBounds, zoom);
}

-(void)handleRotateGesture:(UIGestureRecognizer *)recognizer
{
    UIRotationGestureRecognizer *rotate = (UIRotationGestureRecognizer *)recognizer;
    CGFloat rotation = [rotate rotation]; 
    CGAffineTransform transform = CGAffineTransformRotate(someView.transform, rotation); 
    someView.transform = transform;
    [rotate setRotation:0];
}

#pragma mark -
#pragma mark UIGestureDelegate
#pragma mark -
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    if (![gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] && ![otherGestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
        return YES;
    }
    return NO;
}