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POOnly increase height or width using pinch gesture
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/6759028/using-uipinchgesturerecognizer-to-scale-uiviews-in-single-direction">Using UIPinchGestureRecognizer to scale uiviews in single direction</a> </p> </blockquote> <p><strong>My code is below:</strong></p> <pre><code> UIPinchGestureRecognizer *croperViewGessture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(croperViewScale:)]; croperViewGessture.delegate=self; [croperView addGestureRecognizer:croperViewGessture]; -(void)CanvasScale:(id)sender { if([(UIPinchGestureRecognizer *)sender state]==UIGestureRecognizerStateBegan) { if ([sender numberOfTouches] == 2) { _pntOrig[0] = [(UIPinchGestureRecognizer *)sender locationOfTouch:0 inView:cropedAngle]; _pntOrig[1] = [(UIPinchGestureRecognizer *)sender locationOfTouch:1 inView:cropedAngle]; } else { _pntOrig[0] = [(UIPinchGestureRecognizer *)sender locationInView:cropedAngle]; _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; } if ([(UIPinchGestureRecognizer *)sender state] == UIGestureRecognizerStateChanged) { if ([sender numberOfTouches] == 2) { CGPoint pntNew[2]; pntNew[0] = [(UIPinchGestureRecognizer *)sender locationOfTouch:0 inView:cropedAngle]; pntNew[1] = [(UIPinchGestureRecognizer *)sender locationOfTouch:1 inView:cropedAngle]; 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 = [(UIPinchGestureRecognizer *)sender scale]; CGFloat dscale = scale - 1.0; _xScale = dscale * pX + 1; _yScale = dscale * pY + 1; } } CGAffineTransform transform = cropedAngle.transform; CGAffineTransform newTarnsform = CGAffineTransformScale(transform, _lenOrigX, _lenOrigY); [cropedAngle setTransform:newTarnsform]; </code></pre> <p>}</p> <p>But problem is that when I do Zoomin OR Zoomout then view spread on all over the screen and after it disable Please view my code and tell me what is wrong . </p> <p>Please help me in this issue i am Thankfull in advance. </p>
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    1. USBilal hussain
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    1. COyou have to implement the code in `croperViewScale:` not `CanvasScale:` or change this line `UIPinchGestureRecognizer *croperViewGessture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(croperViewScale:)];` to `UIPinchGestureRecognizer *croperViewGessture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(CanvasScale:)];`
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      1. USPratyusha Terli
    2. COSory, both or same i mean to say both are the same functions name my funtion name is canvasScale i have to implment now correct place
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    3. COdidnt get you....
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      1. USPratyusha Terli
 

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