XIBs
XIBs (XML Interface Builder files) are a file format used in Apple's Xcode development environment for designing user interfaces (UIs) for iOS and macOS applications. They store UI elements, layouts, and connections to code in an XML-based format, allowing developers to visually create and edit interfaces using Interface Builder. XIBs are compiled into NIB files at build time for runtime use in apps.
Developers should learn XIBs when building native iOS or macOS apps with Xcode, as they provide a visual, drag-and-drop way to design UIs, speeding up development and reducing boilerplate code. They are particularly useful for creating static or simple interfaces, such as custom views or screens, and for projects that don't require the dynamic capabilities of Storyboards. However, for complex or multi-screen apps, Storyboards are often preferred.