I created a zoomable UIScrollView and added 100 subviews to it (tiled). The view scrolls perfectly left and right. However, I'd like to allow zooming.

To do so I read that my delegate needs to implement:

```
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return ???;
}

```

I have seen examples that have only one subview to zoom, so they return that subview in that method. In my case, however, I have a lot more. What is the proper way to do the zooming?

I tried creating another UIView and adding the 100 subviews to that one. And then return that one view on the method above, but I doesn't work (it zooms but once it stops, it's not interactive any more).