You’re probably familiar with the iPhone lock screen—it shows up when you press a button or raise the phone. When it’s active, you can see notifications and widgets, access the camera, or unlock/authenticate the phone. Pretty simple stuff, right?
As it turns out, Apple packed a bunch of complexity into this UI—little things that aren’t immediately apparent when you first think about how the lock screen works.
This video tutorial breaks down the lock screen into a system sketch. It’s a quick introduction to sketching out behavior—and how it can help you think about your product’s design.