我有这个简单的程序。它有一个按钮,按下它时会出现第二个窗口。
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
import urllib.request
class second_window(QDialog):
def __init__(self, parent=None):
QDialog.__init__(self)
super(second_window, self).__init__(parent)
layout = QVBoxLayout()
button = QPushButton("close")
button.clicked.connect(self.button_clicked)
layout.addWidget(button)
self.setLayout(layout)
def button_clicked(self):
self.close()
class Main_window(QDialog):
def __init__(self):
QDialog.__init__(self)
layout = QVBoxLayout()
button = QPushButton("Second Window")
self.sec_window = second_window(self)
layout.addWidget(button)
button.clicked.connect(self.button_clicked)
self.setLayout(layout)
def button_clicked(self):
self.sec_window.exec_()
if __name__ == "__main__":
app = QApplication(sys.argv)
dl = window()
dl.show()
app.exec()
但有时如果你在关闭second_window之后关闭Main_window它会崩溃并且我收到一条消息“Python.exe已经停止工作”。 有人可以帮忙吗?
答案 0 :(得分:1)
第一个解决方案:将self.sec_window = second_window(self)
更改为self.sec_window = second_window()
,因为没有必要进行清理,因为second_window
和Main_window
之间没有任何关系。如下面的代码所示
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
class second_window(QDialog):
def __init__(self, parent=None):
QDialog.__init__(self)
super(second_window, self).__init__(parent)
layout = QVBoxLayout()
button = QPushButton("close")
button.clicked.connect(self.button_clicked)
layout.addWidget(button)
self.setLayout(layout)
def button_clicked(self):
self.close()
class Main_window(QDialog):
def __init__(self):
QDialog.__init__(self)
layout = QVBoxLayout()
button = QPushButton("Second Window")
self.sec_window = second_window()
layout.addWidget(button)
button.clicked.connect(self.button_clicked)
self.setLayout(layout)
def button_clicked(self):
self.sec_window.exec_()
if __name__ == "__main__":
app = QApplication(sys.argv)
dl = Main_window()
dl.show()
app.exec()
第二个解决方案:在self.sec_window.deleteLater()
上添加closeEvent(self, event)
,以便能够删除second_window
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
class second_window(QDialog):
def __init__(self, parent=None):
QDialog.__init__(self)
super(second_window, self).__init__(parent)
layout = QVBoxLayout()
button = QPushButton("close")
button.clicked.connect(self.button_clicked)
layout.addWidget(button)
self.setLayout(layout)
def button_clicked(self):
self.close()
class Main_window(QDialog):
def __init__(self):
QDialog.__init__(self)
layout = QVBoxLayout()
button = QPushButton("Second Window")
self.sec_window = second_window(self)
layout.addWidget(button)
button.clicked.connect(self.button_clicked)
self.setLayout(layout)
def button_clicked(self):
self.sec_window.exec_()
def closeEvent(self, event):
self.sec_window.deleteLater()
super().closeEvent(event)
if __name__ == "__main__":
app = QApplication(sys.argv)
dl = Main_window()
dl.show()
app.exec()