Pretty cool, thanks!
Here is some feedback:
* Overall it's great.
* The instructions on where to input the code starts out very precise, but as the piece goes on it gets sloppier. For example, "Open WebViewController.m and after the viewDidLoad method, after the comment, add this new method" is not entirely accurate, because you're adding the new method AFTER the existing method, not after the comment inside the existing method (fortunately the screenshot is there to show what you mean). And the very last code sample (for the loading indicator) doesn't actually have a code sample, just the screenshot.
* I was not able to get forward/backwards swiping to work -- but perhaps this is just a limitation of the simulator?
Definitely looking forward to seeing a more fleshed-out version. Thanks!