Repository files navigation

All apps have asynchronous workflows. Apple'sNSOperation andNSOperationQueue provide a foundation for building arbitrarily complex workflows. This demo code coincides with mySTL CocoaHeads talk on techniques for building "async workflows".

The demo code shows how to:

• use dependent operations
• pass data between operations using a thread-safe key/value store (i.eSession)
• track progress usingNSProgress
• support an easy to understand cancellation policy
• allow app background execution (with just a few lines of code)

Be sure to review the CocoaHeadspresentation slides for additional notes and details.

Here's a short list of related WWDC videos

• WWDC 2015Advanced NSOperations
• WWDC 2015Best Practices In Progress Reporting
• WWDC 2017Modernizing Grand Central Dispatch Usage