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copied!<p>I wrote my own custom extension to <code>UIPinchGestureRecognizer</code> to provide an <code>xScale</code> and a <code>yScale</code>, in addition to the normal <code>scale</code>. This is a drop in replacement for <code>UIPinchGestureRecognizer</code>. You now have the option of looking at the normal <code>scale</code> or the new <code>xScale</code> and <code>yScale</code>. Use these values accordingly to scale your view based on how the user does the pinch gesture.</p> <p>RMPinchGestureRecognizer.h</p> <pre><code>#import <Foundation/Foundation.h> #import <UIKit/UIGestureRecognizerSubclass.h> @interface RMPinchGestureRecognizer : UIPinchGestureRecognizer { CGPoint _pntOrig[2]; CGFloat _lenOrigX; CGFloat _lenOrigY; CGFloat _xScale; CGFloat _yScale; } @property (nonatomic, readonly) CGFloat xScale; @property (nonatomic, readonly) CGFloat yScale; @end </code></pre> <p>RMPinchGestureRecognizer.m</p> <pre><code>#import "RMPinchGestureRecognizer.h" @implementation RMPinchGestureRecognizer @synthesize xScale = _xScale; @synthesize yScale = _yScale; - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; if (self.state == UIGestureRecognizerStateChanged) { if ([self numberOfTouches] == 2) { CGPoint pntNew[2]; pntNew[0] = [self locationOfTouch:0 inView:self.view]; pntNew[1] = [self locationOfTouch:1 inView:self.view]; CGFloat lenX = fabs(pntNew[1].x - pntNew[0].x); CGFloat lenY = fabs(pntNew[1].y - pntNew[0].y); CGFloat dX = fabs(lenX - _lenOrigX); CGFloat dY = fabs(lenY - _lenOrigY); CGFloat tot = dX + dY; CGFloat pX = dX / tot; CGFloat pY = dY / tot; CGFloat scale = [self scale]; CGFloat dscale = scale - 1.0; _xScale = dscale * pX + 1; _yScale = dscale * pY + 1; } } } - (void)setState:(UIGestureRecognizerState)state { if (state == UIGestureRecognizerStateBegan) { if ([self numberOfTouches] == 2) { _pntOrig[0] = [self locationOfTouch:0 inView:self.view]; _pntOrig[1] = [self locationOfTouch:1 inView:self.view]; } else { _pntOrig[0] = [self locationInView:self.view]; _pntOrig[1] = _pntOrig[0]; } _lenOrigX = fabs(_pntOrig[1].x - _pntOrig[0].x); _lenOrigY = fabs(_pntOrig[1].y - _pntOrig[0].y); _xScale = 1.0; _yScale = 1.0; } [super setState:state]; } @end </code></pre>

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