Signal QQmlEngine::quit() emitted, but no receivers connected to handle it quit信号无法接收解决方案 Qt5.7

编程入门行业动态更新时间:2024-10-13 10:23:22

Signal QQmlEngine::quit() emitted, but no receivers connected to handle it quit<a href=https://www.elefans.com/category/jswz/34/1770365.html style= 信号无法接收解决方案 Qt5.7"/>

Signal QQmlEngine::quit() emitted, but no receivers connected to handle it quit信号无法接收解决方案 Qt5.7

问题如题，如果使用的是Rectangle，在main.cpp中include QQmlEngine库，再加上

QObject::connect(viewer.engine(), SIGNAL(quit()), &app, SLOT(quit()));

即可。&app也可以用qApp替代。qApp是一个宏。

官方帮助文档：
This function causes the QQmlEngine::quit() signal to be emitted. Within the Prototyping with qmlscene, this causes the launcher application to exit; to quit a C++ application when this method is called, connect the QQmlEngine::quit() signal to the QCoreApplication::quit() slot.

以下是修改安老师的变色矩阵的代码：

main.cpp:

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Signal QQmlEngine::quit() emitted, but no receivers connected to handle it quit信

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