With the increasing richness of mobile application ecology and functions,building high-performance and highly-re-sponsive applications has become a hot spot in mobile development research in recent years.Among them,the multi-threaded con-current technology can maximize the utilization rate of system resources,and thus is widely used in software development.NSOpera-tion and NSOperationQueue are based on a higher layer of GCD encapsulation,respectively corresponding to GCD tasks and queues.NSOperation can be used to establish models such as status,priority,dependency,and cancellation.Compared with GCD,the API provides finer granularity and a wider operating range.This article describes the concurrency principle of NSOperation in iOS development,and analyzes the scene characteristics of applications in practice,which is of great significance for the develop-ment of mobile applications,especially iOS applications.
mobile developmentconcurrent programmingNSOperationqueue and taskGCD
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