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Qt 5.9插槽命名错误

[英]Qt 5.9 slot naming bug

原文 2017-10-09 10:14:08 2 1 c++/ qt/ qt-slot

I'm using Qt 5.9. 我正在使用Qt 5.9。

I've a problem declaring slots with underscore style in particular when I name it with more then 2 underscores.For example with a void on_stop_treatment() slot, even I don't make a connection, I get QMetaObject::connectSlotsByName: No matching signal for on_stop_treatment() . 我在声明带有下划线样式的插槽时遇到问题，特别是当我用两个以上的下划线void on_stop_treatment()例如，具有void on_stop_treatment()插槽），即使我没有建立连接，我QMetaObject::connectSlotsByName: No matching signal for on_stop_treatment()得到QMetaObject::connectSlotsByName: No matching signal for on_stop_treatment() 。

Anyway, making a connection, even if I get the same message, the slot signal mechanism works. 无论如何，建立连接，即使我收到相同的消息，插槽信号机制也能正常工作。 Removing the second underscore I get no error message and the mechanism works. 删除第二个下划线，我没有收到任何错误消息，并且该机制有效。 (I also tried deleting the moc file and rebuild) （我也尝试过删除moc文件并重建）

1 个解决方案

Declaring your slot with the name on_stop_treatment will clash with the Qt feature called Signal/Slot Automatic Connections 用名称on_stop_treatment声明插槽将与称为信号/插槽自动连接的Qt功能冲突

Qt will detect this specific syntax for your slot, and will try to match stop with a QObject named stop and treatment with a signal of that name declared in the class of the QObject. Qt的将检测这个特定的语法您的插槽，并会尝试将stop与一个QObject命名stop和treatment与类QObject的的声明，名称的信号。

To achieve this, Qt uses internally QMetaObject::connectSlotsByName(this); 为此，Qt在内部使用QMetaObject::connectSlotsByName(this); to perform automatic signal/slot connections. 执行自动信号/插槽连接。