我应该使用 QCoreApplication::processEvents() 还是 QApplication::processEvents()? [英] Should I use QCoreApplication::processEvents() or QApplication::processEvents()?

问题描述

我有一个从 QThreads 和主线程调用的方法.这种方法有时需要很长时间才能在循环中进行计算，因此我将 QCoreApplication::processEvents() 放入其中，这可以防止 GUI 冻结.在某些时候，我已经将 QCoreApplication::processEvents() 更改为 QApplication::processEvents() 但这导致 GUI 冻结(我很确定这就是它的原因，因为因为我把 QCoreApplication::processEvents() 放回去它没有再次冻结)我认为从主线程和 QThreads 调用 QApplication::processEvents() 是否正确?冻结 GUI?

I have a method which is called from both QThreads and the main thread. this method can sometimes take a long time to do its computations in a loop so I put QCoreApplication::processEvents() and this prevents the GUI from freezing. At some point I had changed QCoreApplication::processEvents() for QApplication::processEvents() but that caused the GUI to freeze (im pretty sure thats what was fereezing it because since I put QCoreApplication::processEvents() back it hasnt frozen again) Am I right to think that calling QApplication::processEvents() from both the main thread and QThreads can freeze the GUI?

推荐答案

processEvent() 都不应仅在您有实际待处理事件要处理时调用.您可能会发现这很有用:How to make Qt work when when主线程忙吗?

Neither, processEvent() should be calld only when you have actual pending events to process. You may find this useful : How to make Qt work when main thread is busy?

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