I have seen that Apple's HeaderDoc User Guide has been marked as "Retired Document" with this note:
Important: This document may not represent best practices for current development. Links to downloads and other resources may no longer be valid.
This document was last updated in May. So... which the best practices for documenting code now in Xcode 8 would be? I don't find further information regarding this.
Within the Quick Help information, click Open in Developer Documentation to access Xcode documentation, which includes more thorough explanations and references to related functions. (You can also access this window from the Xcode Help menu or by using the keyboard shortcut Command-Shift-0.)
Xcode provides an easy way to generate documentation. To use this feature, click on any class, property, function, or part you want to add a document. Then press ⌥ – Option + ⌘ - command + / or Editor > Structure > Add documentation from Xcode's menu. Xcode will generate a document template for you.
Swift 5, XCode 11.3+Select the code and then Right click. Save the code snippet and give the completion name as documentation. Now if we start typing documentation, the snippet will be shown in the code completion.
DocC is a documentation compiler that transforms Markdown language into rich documentation. While the Xcode builds your framework, it performs the following steps for creating DocC documentation: Compiler saves details about any public APIs on your framework and generated code.
Apple has added new features in xCode 8 to easily add documentation in your code. To do this, simply move the cursor to any symbol and select Editor > Structure > Add Documentation (Command-Option-/). Xcode scans the symbol you’ve chosen and adds a doc-comment outline including named parameters and return types if they exist.
More info on: http://ericasadun.com/2016/09/16/xcode-8-document-coding-enhancements/
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