編寫一個類ChartView，發送信號signals 編譯失敗
1>chartview.obj : error LNK2019: unresolved external symbol "public: void __cdecl ChartView::signals_stop(void)" (?signals_stop@ChartView@@QEAAXXZ) referenced in function "protected: virtual void __cdecl ChartView::mouseReleaseEvent(class QMouseEvent *)" (?mouseReleaseEvent@ChartView@@MEAAXPEAVQMouseEvent@@@Z)
1>..\..\bin_x64\Debug\Ly52MainDialog\\Ly52MainDialog.exe : fatal error LNK1120: 1 unresolved externals
解決辦法：添加Q_OBJECT即可。