Today we're back at it again with our YouTube application tutorial. I'll show you how to implement a couple of neat tricks in this video. First, we'll learn how to swipe away the navigation bar with a hidesBarsOnSwipe property. Next, we'll add a little horizontal slider bar using some iOS 9 anchor constraints to our menu bar. I'll then show you how to apply animation to this bar as you select different menu icons. Finally, we'll learn how to use completion blocks to abstract and clean out our controller code.