Apple's latest design for UITabBar has been a subject of interest among developers and designers. Recently, Seb Vidal, a well-known developer, took a closer look at the new design and discovered some interesting details about its implementation. According to Seb, Apple uses a private view called _UILiquidLensView to achieve the desired effect. This view consists of multiple subviews, including _UIPortalView, CABackdropLayer, and CAFilter. It appears that multiple CAFilter instances are used to create the glass-like effect, as well as opacityPair and displacementMap. This design choice is likely intended to provide a sleek and modern look for the UITabBar. However, it's worth noting that the use of private views and custom filters may make it more challenging for developers to replicate this design in their own applications. Nevertheless, the new design of UITabBar is a testament to Apple's commitment to innovation and pushing the boundaries of what is possible with iOS development.