title: Infinite horizontal scrolling UIScrollView
body: <p>I have a UIScrollView whose content size is 1200x480. I have some image views on it, whose width adds up to 600. When scrolling towards the right, I simply increase the content size and set the offset so as to make everything smooth (I then want to add other images, but that's not important right now). So basically, the images currently in the viewport remain somewhere on the left, eventually to be removed from the superview.</p>
  
  <p>Now, the problem that I have happens when scrolling towards the left. What I do is I move the images to the end of the content size (so add 600 to each image view's origin.x), and then set the content offset accordingly. It works when the finger is on the screen and the user drags (scrollView.isTracking = YES). When the user scrolls towards the left and lets go (scrollView.isTracking = NO), the image views end up moving too fast towards the right and disappear almost instantly. Does anyone know how I could have the images move nicely and not disappear even when the user's not manually dragging the view and has already let go?</p>
  
  <p>Here's my code for dragging horizontally:</p>
  
  <pre><code>-(void) scrollViewDidScroll:(UIScrollView *)scrollView {
      CGPoint offset = self.scrollView.contentOffset;
      CGSize size = self.scrollView.contentSize;
  
      CGPoint newXY = CGPointMake(size.width-600, size.height-480);
  
      // this bit here allows scrolling towards the right
      if (offset.x &gt; size.width - 320) {
          [self.scrollView setContentSize:CGSizeMake(size.width+320, size.height)];
          [self.scrollView setContentOffset: offset];
      }
  
      // and this is where my problem is:
      if (offset.x &lt; 0) {
          for (UIImageView *imageView in self.scrollView.subviews) {
              CGRect frame = imageView.frame;
              [imageView setFrame:CGRectMake
                  (frame.origin.x+newXY.x, frame.origin.y, 200, frame.size.height)];
          }
          [self.scrollView setContentOffset:CGPointMake(newXY.x+offset.x, offset.y)];
      } 
  }
  </code></pre>
  
  <p>EDIT: This is now working - I had a look at StreetScroller and it's all good now.</p>
  
  <p>However, I now want to zoom in on the scrollview, but viewForZoomingInScrollView is never called. Is it not possible to zoom in on a scrollview with a large content size?</p>