pyqt5窗口居中

#QDEeskopWidget
import sys#获取参数的api
from PyQt5.QtWidgets import QMainWindow,QDesktopWidget,QApplication#因为需要创建主窗口和应用程序
from PyQt5.QtGui import QIcon#专门用来添加图标的
class CenterForm(QMainWindow):#从主窗口继承
    def __init__(self,parent = None):#把这些控件放到parent里
        super(CenterForm,self).__init__(parent)

        #设置主窗口的标题
        self.setWindowTitle("让窗口居中")

        #设置窗口尺寸
        self.resize(400,300)
    def center(self):
        #获取屏幕坐标系
        screen = QDesktopWidget().screenGeometry()#得到屏幕的坐标系
        #获取窗口坐标系
        size = self.geometry()
        newLeft = (screen.width()-size.width())/2#计算
        newTop = (screen.height()-size.height())/2

        self.move(newLeft,newTop)
if __name__ == "__main__":
    app = QApplication(sys.argv)

    main = CenterForm()
    main.show()

    sys.exit(app.exec_())