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POImage size resets to original after performing pich using UIPichGestureRecognizer in iphone
 

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  1. POImage size resets to original after performing pich using UIPichGestureRecognizer in iphone
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    <p>I have one view controller in which I have added UIScrollView &amp; UIImageView programatically. I have added UIPichGestureRecognizer to the UIImageView. My UIImageView is added to UIScrollView as a subview. </p> <p>My problem is when I try to pinch the image , it zoom in. But when I release the touches from screen it again come to its default size. I can not find the error in code. Please help me. Below is my code</p> <pre><code> - (void)createUserInterface { scrollViewForImage = [[UIScrollView alloc]initWithFrame:CGRectMake(20.0f, 60.0f, 280.0f, 200.0f)]; scrollViewForImage.userInteractionEnabled = YES; scrollViewForImage.multipleTouchEnabled = YES; scrollViewForImage.backgroundColor = [UIColor redColor]; scrollViewForImage.autoresizesSubviews = YES; scrollViewForImage.maximumZoomScale = 1; scrollViewForImage.minimumZoomScale = .50; scrollViewForImage.clipsToBounds = YES; scrollViewForImage.delegate = self; scrollViewForImage.bouncesZoom = YES; scrollViewForImage.contentMode = UIViewContentModeScaleToFill; [self.contentView addSubview:scrollViewForImage]; imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 280.0f, 200.0f)]; [imageView setBackgroundColor:[UIColor clearColor]]; imageView.userInteractionEnabled = YES; imageView.multipleTouchEnabled = YES; UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)]; [pinchRecognizer setDelegate:self]; [imageView addGestureRecognizer:pinchRecognizer]; //[self.contentView addSubview:imageView]; [self.scrollViewForImage addSubview:imageView]; scrollViewForImage.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height); } -(UIView *) viewForZoomingInScrollView:(UIScrollView *)inScroll { return imageView; } -(void)pinch:(id)sender { [self.view bringSubviewToFront:[(UIPinchGestureRecognizer*)sender view]]; if([(UIPinchGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) { lastScale = 1.0; return; } CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]); CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform; CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale); [[(UIPinchGestureRecognizer*)sender view] setTransform:newTransform]; lastScale = [(UIPinchGestureRecognizer*)sender scale]; } </code></pre>
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