如何终止一个QThread？
QThread::terminate() 文档指出，不鼓励通过调用此函数来终止线程。
在我的程序中，我需要在线程完成执行之前终止它。该线程正在执行一些繁重的计算，我希望用户能够控制停止计算。
我怎样才能做到这一点而不是调用QThread::terminate()？
QThread::terminate() documentation states that it is discouraged to terminate a thread by calling this function.
In my program, I need to terminate a thread before it finishes execution. The thread is performing some heavy computation and I want the user to have control to stop calculation.
How can I do that instead of calling QThread::terminate()?
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从线程外部设置一个标志，该标志由线程内的计算检查，如果设置了标志，则停止计算。
Set a flag from outside the thread that is checked by the computation within the thread and stop the calculation if the flag is set.
使用标志是一种明显且最常见的方法，但如果您在 linux/unix 平台上工作，我建议您改用管道。我在使用标志时遇到了同样的问题（这使得代码线程不安全，并且很难跟踪由此类标志引起的错误），然后我更改了实现以使用管道，这是完成所需任务的有效方法。
如果您愿意，对于 Linux 平台，我可以向您展示如何使用管道来终止 QThread。
您可能还拥有相当于管道的Windows，但我对此不太了解，因为我没有在Windows 平台上进行过太多编程。
希望这有帮助
Using flags is an obvious and the most common way to do the trick, but if you are working on a linux/unix platform I would advise you to use pipes instead. I had the same issue where I used a flag (this makes the code threadunsafe, and bugs arising out of such a flag are hard to trace), then I changed the implementation to use pipes which were an efficient way to do the needful.
If you want, for a linux platform I can show you how to use pipes to terminate a QThread.
You may also have windows equivalent of pipes, which I don't know much about as I haven't done much of programming on Windows platform.
Hope this helps
最好是使用标志+互斥体，这将使解决方案线程安全。
Best is to use flag + mutex which will make the solution thread safe.