Runtime Architecture
Keith Lee · Apress eBooks · 2013
The runtime system is a key element of the Objective-C platform. It’s what implements the dynamic features and object-oriented capabilities of the language. Its structure enables you to develop Objective-C code without being exposed to the internals of the runtime, yet also provides a public API that enables you to write code to directly invoke runtime services. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.