Earlier this month I mentioned a component called iOS-multi-back-button providing a popover allowing users to navigate through their view history.
Here’s a component submitted by Taiki Suzuki that similarly adds navigation through previously seen views called SAHistoryNavigationViewController.
Like iOS-multi-back-button users can navigate through views with a long press, but rather than bring up a popover SAHistoryNavigationViewController zooms out and allows users to swipe and choose between views.
Here’s an image showing SAHistoryNavigationViewController in action:
You can find SAHistoryNavigationViewController on Github here.
A nice enhancement for the back button.