窗口居中显示

"""主窗口居中"""
from PyQt5.QtWidgets import QDesktopWidget, QApplication, QMainWindow
import sys

class Winform(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowTitle('主窗口放在屏幕中间例子')
        self.resize(370, 250)
        self.center()


    def center(self):
        # 计算屏幕的大小
        screen = QDesktopWidget().screenGeometry()
        # 获取窗口的大小
        size = self.geometry()
        # 将窗口移动到屏幕的中央
        self.move((screen.width() - size.width())/2, (screen.height() - size.height()) /2 )

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = Winform()
    win.show()
    sys.exit(app.exec_())