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PODrag, scale and rotate multiple UIImageviews
 

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    <p>I've got it so far that I can move, scale and rotate all the objects, but the multiple objects all move together. I want them to move seperate. I guess I have to change the objectatIndex to 1, but it just crashes.</p> <p>I've used the following code:</p> <pre><code>- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { NSArray *allTouches = [touches allObjects]; UITouch* t; if([[event allTouches] count]==1){ if (CGRectContainsPoint([Birdie frame], [[allTouches objectAtIndex:0] locationInView:theimageView]) &amp;&amp; CGRectContainsPoint([imageViewauto frame], [[allTouches objectAtIndex:0] locationInView:theimageView])) { t=[[[event allTouches] allObjects] objectAtIndex:0]; touch1=[t locationInView:nil]; } }else{ t=[[[event allTouches] allObjects] objectAtIndex:0]; touch1=[t locationInView:nil]; t=[[[event allTouches] allObjects] objectAtIndex:1]; touch2=[t locationInView:nil]; } } -(double)distance:(CGPoint)point1 toPoint:(CGPoint)point2 { double deltaX, deltaY; deltaX = point1.x - point2.x; deltaY = point1.y - point2.y; return sqrt(deltaX * deltaX + deltaY * deltaY); } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { CGPoint currentTouch1; CGPoint currentTouch2; NSArray *allTouches = [touches allObjects]; UITouch* t; float scale,rotation; if([[event allTouches] count]==1){ t=[[[event allTouches] allObjects] objectAtIndex:0]; if (CGRectContainsPoint([Birdie frame], [[allTouches objectAtIndex:0] locationInView:theimageView]) &amp;&amp; CGRectContainsPoint([imageViewauto frame], [[allTouches objectAtIndex:0] locationInView:theimageView])) { touch2=[t locationInView:nil]; Birdie.center=CGPointMake(Birdie.center.x+touch2.x-touch1.x,Birdie.center.y+touch2.y-touch1.y); imageViewauto.center=CGPointMake(imageViewauto.center.x+touch2.x-touch1.x,imageViewauto.center.y+touch2.y-touch1.y); touch1=touch2; } } else if([[event allTouches] count]==2) { t=[[[event allTouches] allObjects] objectAtIndex:0]; currentTouch1=[t locationInView:nil]; t=[[[event allTouches] allObjects] objectAtIndex:1]; currentTouch2=[t locationInView:nil]; double distance1 = [self distance:currentTouch1 toPoint:currentTouch2]; double distance2 = [self distance:touch1 toPoint:touch2]; if (distance2 == 0) { //handle the case where distance is zero } else { scale =distance1 / distance2;} rotation=atan2(currentTouch2.y-currentTouch1.y, currentTouch2.x-currentTouch1.x)-atan2(touch2.y-touch1.y,touch2.x-touch1.x); if(isnan(scale)){ scale=1.0f; } NSLog(@"rotation %f",rotation); NSLog(@"scale %f",scale); if (CGRectContainsPoint([Birdie frame], [[allTouches objectAtIndex:0] locationInView:theimageView]) &amp;&amp; CGRectContainsPoint([imageViewauto frame], [[allTouches objectAtIndex:0] locationInView:theimageView])) { Birdie.transform=CGAffineTransformScale(Birdie.transform, scale,scale); Birdie.transform=CGAffineTransformRotate(Birdie.transform, rotation); imageViewauto.transform=CGAffineTransformScale(imageViewauto.transform, scale,scale); imageViewauto.transform=CGAffineTransformRotate(imageViewauto.transform, rotation); } else // In case of scaling or rotating the background imageView { imageView.transform=CGAffineTransformScale(imageView.transform, scale,scale); imageView.transform=CGAffineTransformRotate(imageView.transform, rotation); } touch1=currentTouch1; touch2=currentTouch2; } } </code></pre>
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