问题
It is always being asked in interview how many maximum threads we can run in ios iphone programming simultaneously in NSOperationQueue and through GCD async?
Please explain the answer.
回答1:
You should be using NSOperationQueueDefaultMaxConcurrentOperationCount when you create your operations to let the OS decide the maximum number of operations - it will decide this based on the hardware available and system resources. The number will of course vary depending on device.
来源：https://stackoverflow.com/questions/32023212/what-is-the-maximum-number-of-threads-we-can-run-in-nsoperationqueue-simultaneou