QCustomplot报错: error: LNK2019: 无法解析的外部符号 "__declspec(dllimport) public: __thiscall QPrinter::QPrinter(enum QPrinter::PrinterMode)" 添加QCustomplot报错: QPrinter@@QAE@W4PrinterMode@0@@Z),函数 "public: bool __thiscall QCustomPlot::savePdf(class QString const &,int,int,enum QCP::...