标签：
http://stackoverflow.com/questions/24831431/qt-dialog-close-and-deletehttp://stackoverflow.com/questions/24831431/qt-dialog-close-and-delete
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
qt 子 widget如果想干净的close 需要先delete wa
原文地址：http://my.oschina.net/zsjasper/blog/467086
