PyQT:如何打开新窗口

时间:2016-04-21 11:20:24

标签: python pyqt pyqt4

首先,之前已经回答了类似的问题,但我需要一些帮助。

我有一个窗口,其中包含一个按钮(第一类)我想要按下,第二个空白窗口将出现(第二类)

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()  

但是on_pressed,会出现此错误消息:

AttributeError: 'Second' object has no attribute 'exec_'

(design1和design2来自Qt设计师。)

任何想法都会受到赞赏。

1 个答案:

答案 0 :(得分:18)

我认为你应该使用show方法。

这是一个工作示例(源自你的):

#!/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()

如果每次单击按钮都需要新窗口,则可以在the on_pushButton_clicked方法

中更改创建对话框的代码
#!/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()