Looking at Model-View-Controller in Cocoa

According to Apple's documentation, the standard pattern for Cocoa applications is called Model-View-Controller. Despite the name, this pattern is quite unlike the original definition of Model-View-Controller in Smalltalk-80. Cocoa's application design pattern actually shares more in common with ideas developed at Taligent (an Apple co-developed project from the 1990s) than with the original Smalltalk origin of the term. In this article, I'll look at a little theory and history behind the primary application design pattern used in Cocoa. I'll discuss the key shortcoming of Cocoa's Model-View-Controller approach, Apple's aborted efforts to address this shortcoming and wonder from where the next major improvements will come. Smalltalk-80 Probably the widest quoted pattern in UI development is Model View Controller (MVC) - it's also the most misquoted. I've lost count of the times I've seen something described as MVC which turned out to be nothing like it. - Martin Fowler, GUI Architectures I want to quickly address what Martin Fowler means in the above quote since, by the definition Fowler uses – the definition originally used by Smalltalk-80 – the approach commonly used to develop Cocoa apps is not Model-View-Controller.

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