Editorial question142K views1,719 votes0 answers2,070 following
AI-generatedNotificationCenter delivery order for concurrent multi-threaded posts
Apple's Foundation NotificationCenter manages the distribution of notifications to registered observers. When notifications are posted from a single thread, the delivery sequence is predictable. However, a design challenge arises when multiple threads post notifications concurrently to the same center. In environments such as iOS 17 or macOS 14, the framewor