Understanding the SwiftUI grid layout

SwiftUI's introduction of grid layouts at Apple's 2020 Worldwide Developer’s Conference brought much-desired functionality to developers, allowing them to implement complex UI structures akin to UICollectionView. The LazyVGrid and LazyHGrid layouts enable developers to arrange views in vertical and horizontal grids, respectively, using various customizable GridItems that can be fixed, flexible, or adaptive to different screen sizes. This tutorial demonstrates the use of these grids through the development of a reminder app that categorizes reminders by due date and completion status, showcasing both vertical and horizontal grid implementations with pinned headers for improved navigation. The app's grid system is versatile, allowing users to switch between layouts, thus accommodating more data efficiently in limited space. Additionally, the tutorial touches on the use of PinnedScrollableViews to create sticky headers, enhancing the user experience by keeping category labels visible during scrolling.