Python PyQT：如何打开新窗口
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PyQT: how to open new window
提问by user3060854
First of all, similar questions have been answered before, yet I need some help with this one.
首先，之前已经回答过类似的问题，但我需要一些帮助。
I have a window which contains one button (Class First)and I want on pressed, a second blank window to be appeared (Class Second).
我有一个包含一个按钮（Class First）的窗口，我想在按下时出现第二个空白窗口（Class Second）。
I fiddled with the code copied from this question: PyQT on click open new window, and I wrote this code:
我摆弄了从这个问题复制的代码：PyQT on click open new window，我写了这段代码：
# -*- coding: utf-8 -*-
from PyQt4 import QtGui, QtCore
import sys
import design1, design2
class Second(QtGui.QMainWindow, design2.Ui_MainWindow):
def __init__(self, parent=None):
super(Second, self).__init__(parent)
self.setupUi(self)
class First(QtGui.QMainWindow, design1.Ui_MainWindow):
def __init__(self, parent=None):
super(First, self).__init__(parent)
self.setupUi(self)
self.pushButton.clicked.connect(self.on_pushButton_clicked)
self.dialog = Second(self)
def on_pushButton_clicked(self):
self.dialog.exec_()
def main():
app = QtGui.QApplication(sys.argv)
main = First()
main.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
but on_pressed, this error message appears:
但是 on_pressed 时，会出现此错误消息：
AttributeError: 'Second' object has no attribute 'exec_'
(design1 and design2 have been derived from the Qt designer.)
（design1 和 design2 源自 Qt 设计器。）
Any thought would be appreciated.
任何想法将不胜感激。
回答by salomonderossi
I think you should use the showmethod.
我认为您应该使用该show方法。
Here ist a working example (derivated from yours):
这是一个工作示例（源自您的示例）：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from PyQt4 import QtGui, QtCore
import sys
class Second(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Second, self).__init__(parent)
class First(QtGui.QMainWindow):
def __init__(self, parent=None):
super(First, self).__init__(parent)
self.pushButton = QtGui.QPushButton("click me")
self.setCentralWidget(self.pushButton)
self.pushButton.clicked.connect(self.on_pushButton_clicked)
self.dialog = Second(self)
def on_pushButton_clicked(self):
self.dialog.show()
def main():
app = QtGui.QApplication(sys.argv)
main = First()
main.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
If you need a new window every time you click the button, you can change the code that the dialog is created inside the on_pushButton_clickedmethod
如果每次点击按钮都需要一个新窗口，可以修改the on_pushButton_clicked方法里面创建对话框的代码
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from PyQt4 import QtGui, QtCore
import sys
class Second(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Second, self).__init__(parent)
class First(QtGui.QMainWindow):
def __init__(self, parent=None):
super(First, self).__init__(parent)
self.pushButton = QtGui.QPushButton("click me")
self.setCentralWidget(self.pushButton)
self.pushButton.clicked.connect(self.on_pushButton_clicked)
self.dialogs = list()
def on_pushButton_clicked(self):
dialog = Second(self)
self.dialogs.append(dialog)
dialog.show()
def main():
app = QtGui.QApplication(sys.argv)
main = First()
main.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
