Qt报错:In member function ‘virtual void DoubleSlider:.mousePressEvent(QMouseEvent*)“:

Qt报这个错误,In member function 'virtual void DoubleSlider:.mousePressEvent(QMouseEvent*)":

Qt报错:In member function ‘virtual void DoubleSlider:.mousePressEvent(QMouseEvent*)“:_第1张图片只需要加上相对应的头文件即可:

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