kUTTypePNG

kUTTypePNG is a constant representing the Uniform Type Identifier (UTI) for the Portable Network Graphics (PNG) file format within Apple's operating systems. This UTI is part of the Core Services framework and is used to identify and manage various data types, including image files. When an application or the operating system needs to work with a PNG image, it can refer to it using kUTTypePNG. This allows for a standardized way to handle file types, enabling interoperability between different applications and system services. For instance, when you share a PNG image from one app to another, the system uses the UTI to understand that it's dealing with a PNG. It's also used in conjunction with frameworks like Uniform Type Identifiers, which provide a system-wide registry of data types. This ensures that applications can correctly interpret, create, and manipulate PNG files without needing to hardcode specific file extensions or MIME types. The use of UTIs like kUTTypePNG promotes a more robust and flexible approach to data handling in macOS, iOS, and other Apple platforms.