QObject: Cannot create children for a parent that is in a different thread

最新推荐文章于 2024-10-16 19:47:32 发布

Qicz

最新推荐文章于 2024-10-16 19:47:32 发布

阅读量2.2k

点赞数

分类专栏： Qt 文章标签： thread constructor function object signal access

Qt 专栏收录该内容

65 篇文章

订阅专栏

本文探讨了Qt中QNetworkRequestManager对象在不同线程间使用导致的问题，并提供了一种解决方案：通过信号与槽机制来确保对象在正确的线程中被操作。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

http://stackoverflow.com/questions/3268073/qobject-cannot-create-children-for-a-parent-that-is-in-a-different-thread

The run() member function is executed in a different thread, rather than the thread where QNetworkRequestManager object was created.

This kind of different-thread problems happen all the time with Qt when you use multiple threads. The canonical way to solve this problem is to use signals and slots.

Create a slot in the object where QNetworkRequestManager belongs to, create a signal in ResultThread and connect both of the somewhere, the constructor of ResultThread would be a good place.

The code which is currently in ResultThread::run() goes to the new slot, and is replaced by a emit(yourSignal()). If neccessary send a pointer to your ResultThread as a parameter with your emit function to gain access to member funtions/variables.