PyQt5 实现字体大小自适应分辨率的方法

 if __name__ == "__main__":
  v_compare = QVersionNumber(5,6,0)
  v_current,_ = QVersionNumber.fromString(QT_VERSION_STR) #获取当前Qt版本
  if QVersionNumber.compare(v_current,v_compare) >=0 :
    QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)  #Qt从5.6.0开始，支持High-DPI
    app = QApplication(sys.argv)  #
  else:
    app = QApplication(sys.argv)
    font = QFont("宋体")
    pointsize = font.pointSize()
    font.setPixelSize(pointsize*90/72)
    app.setFont(font)
  mymainwin = Mymainwindow()
  mymainwin.show()
  sys.exit(app.exec())