关于QT中自动添加槽函数编译出错的问题

浅谈：QT       += widgets

1.当出现一下的问题的时候，在.pro文件中加上  QT       += widgets，试试看。	QObject::connect: No such slot QToolBox::showChatWidget1() in ..\qq_test_new\drawer.cpp:17	QObject::connect: No such slot QToolBox::showChatWidget2() in ..\qq_test_new\drawer.cpp:25	QObject::connect: No such slot QToolBox::showChatWidget3() in ..\qq_test_new\drawer.cpp:33	QObject::connect: No such slot QToolBox::showChatWidget4() in ..\qq_test_new\drawer.cpp:41	QObject::connect: No such slot QToolBox::showChatWidget5() in ..\qq_test_new\drawer.cpp:49	QObject::connect: No such slot QToolBox::showChatWidget6() in ..\qq_test_new\drawer.cpp:57	QObject::connect: No such slot QToolBox::showChatWidget7() in ..\qq_test_new\drawer.cpp:65	QObject::connect: No such slot QToolBox::showChatWidget8() in ..\qq_test_new\drawer.cpp:73        QObject::connect: No such slot QToolBox::showChatWidget9() in ..\qq_test_new\drawer.cpp:812.在pro文件里写”QT+=widgets”表示引入QtWidget这个module，qmake在生成makefile的时候，会设置好include path 和 lib path，在link时候设置好libs。