我正在制作 QMessageBox，但无法将弹出窗口中的文本和按钮居中。
这是我的消息框代码：
def update_msgbox(self):
self.msg = QMessageBox(self.centralwidget)
self.msg.setWindowTitle(" Software Update")
self.msg.setText("A software update is available. \nDo you want to update now?")
self.msg.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
self.msg.setStyleSheet("QLabel{min-width: 200px;}")
self.msg.exec_()
这是弹出窗口当前的样子：
有没有办法让文本居中并使按钮居中？
一种可能的解决方案是移除（或在必要时删除）元素并将它们添加回布局：
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication,QMessageBox,QLabel,QDialogButtonBox
class MessageBox(QMessageBox):
def __init__(self,parent=None):
super().__init__(parent)
grid_layout = self.layout()
qt_msgboxex_icon_label = self.findChild(QLabel,"qt_msgboxex_icon_label")
qt_msgboxex_icon_label.deleteLater()
qt_msgbox_label = self.findChild(QLabel,"qt_msgbox_label")
qt_msgbox_label.setAlignment(Qt.AlignCenter)
grid_layout.removeWidget(qt_msgbox_label)
qt_msgbox_buttonbox = self.findChild(QDialogButtonBox,"qt_msgbox_buttonbox")
grid_layout.removeWidget(qt_msgbox_buttonbox)
grid_layout.addWidget(qt_msgbox_label,alignment=Qt.AlignCenter)
grid_layout.addWidget(qt_msgbox_buttonbox,1,alignment=Qt.AlignCenter)
def main():
app = QApplication([])
msg = MessageBox()
msg.setWindowTitle("Software Update")
msg.setText("A software update is available.<br>Do you want to update now?")
msg.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
msg.setStyleSheet("QLabel{min-width: 200px;}")
msg.exec_()
if __name__ == "__main__":
main()