pyqt5中QFileDialog程序崩溃，跪求大神指导！！！

返回上一步 / in 0

self.bt_located.clicked.connect(self.located)
按钮调用located函数
def located(self):
directory = QFileDialog.getExistingDirectory(self,"选取文件夹","C:/")
# self.lineEdit.setText(directory)
点击按钮后程序崩溃，显示python已停止工作

百思不得其解，跪求解决方法！！！

因为要传入的参数必须是widget，换成directory = QFileDialog.getExistingDirectory(self.centralwidget,"选取文件夹","C:/")