NSDocument and states example
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DocumentStateExample.xcodeproj
DocumentStateExample
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LICENSE
README.md

README.md

NSDocument and States

An example of how to implement a central state in a NSDocument environment and use it for back and forward navigation by making use of NSUndoManager

Some bullet points

  • Reference to document is available in NSViewController via document property, which is dynamically assigned
  • On any change of document the respective setupController and cleanupController methods are called for custom document related setup
  • A state object in the document class describes UI states, it is KVO compatible
  • A helper can easily observe property changes
  • Navigation between states is managed by an NSUndoManager instance
  • A special container view class can load view controllers and pass the document reference
  • The example includes first responder mapping to the state by tag