What is your opinion and experience working with the Objective-C language?

Objective-C is an object-oriented programming language that has long been the main language for developing iOS and macOS applications. It is based on C and adds a dynamic messaging system similar to Smalltalk.

My experience with Objective-C includes supporting and developing existing projects, where understanding memory management features (manual retain-release or ARC), working with categories, protocols, and the language's dynamic capabilities are important. Although Swift is now replacing Objective-C, knowledge of this language is useful for maintaining legacy code and integrating with libraries written in Objective-C.

Example of a method in Objective-C:

- (void)printMessage:(NSString *)message {
    NSLog(@"Message: %@", message);
}