ios - 如何暂停 NSOperationQueue 中的 NSOperation？

Question

我需要暂停插入到 NSOperationQueue 中的正在运行的 NSOperation。目前我正在取消所有操作并重新启动它们。但这会导致在已完成的流程方面出现某种重复。我尝试使用 NSOperationQueue 的 setSuspended 标志。但它并没有暂停操作。有什么出路吗？

Answer 1

看到这个:Link

这里来自 apple docs :

Suspending and Resuming Queues If you want to issue a temporary halt to the execution of operations, you can suspend the corresponding operation queue using the setSuspended: method.

Suspending a queue does not cause already executing operations to pause in the middle of their tasks. It simply prevents new operations from being scheduled for execution. You might suspend a queue in response to a user request to pause any ongoing work, because the expectation is that the user might eventually want to resume that work.