DeprecationWarning: QDesktopWidget.availableGeometry(int screen) const 已弃用 centerPoint = QDesktopWidget().availableGeometry().center()

Question

还有什么选择呢？如何使用 QGuiApplication 和 QScreen 将我的 QMainWindow 放置在屏幕中央。

Answer 1

您只需使用QGuiApplication.primaryScreen()（或者QGuiApplication.screens()[i]如果您想在 i-esima 屏幕上居中），如下所示：

from PyQt5 import QtCore, QtGui, QtWidgets
# or
# from PySide2 import QtCore, QtGui, QtWidgets


def center_window(widget):
    window = widget.window()
    window.setGeometry(
        QtWidgets.QStyle.alignedRect(
            QtCore.Qt.LeftToRight,
            QtCore.Qt.AlignCenter,
            window.size(),
            QtGui.QGuiApplication.primaryScreen().availableGeometry(),
        ),
    )


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    w = QtWidgets.QMainWindow()
    w.resize(640, 480)
    w.show()

    QtCore.QTimer.singleShot(0, lambda: center_window(w))

    sys.exit(app.exec_())