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    <p>I like your idea of keeping all the pins in a view dedicated to pins (iconsView), but I decided to just add them as subviews of what you called imageViewMap.</p> <p>Import the QuartzCore.framework file to your project.</p> <p>Call your view controller MyViewController.</p> <pre><code>#import &lt;QuartzCore/QuartzCore.h&gt; @interface MyViewController : UIViewController &lt;UIScrollViewDelegate&gt; @property (retain) UIScrollView *scrollView; @property (retain) UIImageView *imageView; </code></pre> <p>// and so on</p> <pre><code>@implementation MyViewController @synthesize scrollView; @synthesize imageView; </code></pre> <p>I'll assume you have a pin view or a view controller called DropPinViewController. If you're just using an image, it can be a UIImageView, but my pins have labels, so I used a xib. The pin should point to the bottom center of the xib because we're going to put an anchor point there.</p> <p>In your viewDidLoad of your MyViewController, add your pin views as subviews of imageView. Add the imageView as a subview to the scrollView. Set the content size of scrollView.</p> <pre><code>scrollView.delegate = self; </code></pre> <p>Use these delegate methods:</p> <pre><code>- (void)scrollViewDidZoom:(UIScrollView *)aScrollView { for (UIView *dropPinView in imageView.subviews) { CGRect oldFrame = dropPinView.frame; // 0.5 means the anchor is centered on the x axis. 1 means the anchor is at the bottom of the view. If you comment out this line, the pin's center will stay where it is regardless of how much you zoom. I have it so that the bottom of the pin stays fixed. This should help user RomeoF. [dropPinView.layer setAnchorPoint:CGPointMake(0.5, 1)]; dropPinView.frame = oldFrame; // When you zoom in on scrollView, it gets a larger zoom scale value. // You transform the pin by scaling it by the inverse of this value. dropPinView.transform = CGAffineTransformMakeScale(1.0/scrollView.zoomScale, 1.0/scrollView.zoomScale); } - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { return imageView; } </code></pre>
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    1. USDavid Braun
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    1. COThis is so awesome I am kind of sick. I have many other convoluted methods that do this... So simple. I switched to this and it works great.
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