This tag should be used only on questions that are about Objective-C features or depend on code in the language. The tags [cocoa] and [cocoa-touch] should be used to ask about Apple's frameworks or classes. Use the related tags [ios] and [osx] for issues specific to those platforms.
A late-binding, message-based, object-oriented language that is a strict superset of C and is primarily used for programming primarily on Apple's Mac OS X and iOS platforms. Objective-C can also be used on other platforms that support gcc or clang.