关于Qt使用样式表shezhiQLabel样式后应用到QMessageBox不自动换行

QMessageBox box;
QLabel *labelMessage = new QLabel();
labelMessage->setWordWrap(true);
labelMessage->setAlignment(Qt::AlignCenter);
labelMessage->setText("这是一段很长很长很长很长很长很长很长很长很长很长很长很长的测试文字");
labelMessage->setStyleSheet("QLabel{min-width:200px;min-height:200px;font-size:15pt;}QPushButton{font-size:15pt;}");
box.setWindowTitle("测试测试");
box.setIcon(QMessageBox::Critical);
box.layout()->setAlignment(Qt::AlignRight);
box.layout()->addWidget(labelMessage);
box.setStandardButtons(QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel);
box.exec();