ios - 暂停已经执行的任务 NSOperationQueue

Question

我在暂停当前正在执行的任务时遇到问题，我尝试设置 NSOperationQueue setSuspended=YES 暂停和 setSuspended=NO恢复进程。

根据 apple docs我不能暂停已经执行的任务。

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.

我的应用程序需要在互联网不可用的情况下暂停上传操作的时间，并在互联网可用后最终恢复相同的操作。有什么解决方法吗？或者我只需要从零开始当前正在执行的任务？

Answer 1

我认为你需要从零开始。否则会有两个问题。如果你恢复当前的上传，你不能保证你没有错过任何数据包。同时如果长时间连接不上，服务器可能会因为操作不完整而删除您之前上传的数据。