最近做个软件，用PyQT写的，在实现菜单栏点击弹出新窗口的时候严重被卡壳，发现用WxPython的思想和方式来做完全无法实现。PyQT的中文资料实在是太少了。看了点英文资料和QT的资料，逆推PyQT的实现方法，总算搞定。下面是一个小demo。

主界面的代码如下所示：

# -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui from dialog1 import Dialog1 from dialog2 import Dialog2 import sys try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: def _fromUtf8(s): return s try: _encoding = QtGui.QApplication.UnicodeUTF8 def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig, _encoding) except AttributeError: def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig) class MainWindow(QtGui.QWidget): dialog1_signal = QtCore.pyqtSignal() #定义一个无参数的信号，串口设定与子站初始化信号 dialog2_signal = QtCore.pyqtSignal() #定义一个无参数的信号，串口设定与子站初始化信号 exit_signal = QtCore.pyqtSignal() #定义一个无参数的信号，串口设定与子站初始化信号 def __init__(self): super(MainWindow,self).__init__() def setupUi(self, Form): Form.setObjectName(_fromUtf8("Form")) Form.resize(400, 300) self.form = Form self.pushButton = QtGui.QPushButton(Form) self.pushButton.setGeometry(QtCore.QRect(70, 90, 75, 23)) self.pushButton.setObjectName(_fromUtf8("pushButton")) self.pushButton_2 = QtGui.QPushButton(Form) self.pushButton_2.setGeometry(QtCore.QRect(240, 90, 75, 23)) self.pushButton_2.setObjectName(_fromUtf8("pushButton_2")) self.pushButton_3 = QtGui.QPushButton(Form) self.pushButton_3.setGeometry(QtCore.QRect(150, 160, 75, 23)) self.pushButton_3.setObjectName(_fromUtf8("pushButton_3")) self.label = QtGui.QLabel(Form) self.label.setGeometry(QtCore.QRect(170, 40, 54, 16)) self.label.setObjectName(_fromUtf8("label")) self.retranslateUi(Form) QtCore.QMetaObject.connectSlotsByName(Form) #信号连接到指定槽 self.pushButton.clicked.connect(self.on_pushButton_clicked) self.pushButton_2.clicked.connect(self.on_pushButton_2_clicked) self.pushButton_3.clicked.connect(self.on_pushButton_3_clicked) def retranslateUi(self, Form): Form.setWindowTitle(_translate("Form", "Form", None)) self.pushButton.setText(_translate("Form", "进入dialog1", None)) self.pushButton_2.setText(_translate("Form", "进入dialog2", None)) self.pushButton_3.setText(_translate("Form", "退出", None)) self.label.setText(_translate("Form", "主窗体", None)) def on_pushButton_clicked(self): self.form.hide() Form1 = QtGui.QDialog() ui = Dialog1() ui.setupUi(Form1) Form1.show() Form1.exec_() self.form.show() def on_pushButton_3_clicked(self, Form): #QtCore.QObject.connect( self.pushButton_3, QtCore.SIGNAL("clicked()"), self, QtCore.SLOT(quit())) #也可以这样 self.form.close() def on_pushButton_2_clicked(self): self.form.close() Form1 = QtGui.QDialog() ui = Dialog2() ui.setupUi(Form1) Form1.show() Form1.exec_() self.form.show() if __name__ == '__main__': app = QtGui.QApplication(sys.argv) Form = QtGui.QWidget() window = MainWindow() window.setupUi(Form) Form.show() sys.exit(app.exec_()) pass

Dialog1界面的代码如下：

# -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: def _fromUtf8(s): return s try: _encoding = QtGui.QApplication.UnicodeUTF8 def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig, _encoding) except AttributeError: def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig) class Dialog1(QtGui.QWidget): def setupUi(self, Dialog): Dialog.setObjectName(_fromUtf8("Dialog")) Dialog.resize(400, 300) self.form = Dialog self.label = QtGui.QLabel(Dialog) self.label.setGeometry(QtCore.QRect(180, 50, 54, 12)) self.label.setObjectName(_fromUtf8("label")) self.dialog1_pushButton = QtGui.QPushButton(Dialog) self.dialog1_pushButton.setGeometry(QtCore.QRect(160, 130, 75, 23)) self.dialog1_pushButton.setObjectName(_fromUtf8("pushButton")) self.retranslateUi(Dialog) QtCore.QMetaObject.connectSlotsByName(Dialog) #信号连接到指定槽 self.dialog1_pushButton.clicked.connect(self.on_dialog1_pushButton_clicked) def retranslateUi(self, Dialog): Dialog.setWindowTitle(_translate("Dialog", "Dialog", None)) self.label.setText(_translate("Dialog", "dialog1", None)) self.dialog1_pushButton.setText(_translate("Dialog", "返回主窗体", None)) def on_dialog1_pushButton_clicked(self): self.form.close() if __name__ == "__main__": import sys app = QtGui.QApplication(sys.argv) Dialog = QtGui.QDialog() ui = Dialog1() ui.setupUi(Dialog) Dialog.show() sys.exit(app.exec_()) Dialog2界面的代码如下：[python] view plain copy# -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: def _fromUtf8(s): return s try: _encoding = QtGui.QApplication.UnicodeUTF8 def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig, _encoding) except AttributeError: def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig) class Dialog2(object): def setupUi(self, Dialog): Dialog.setObjectName(_fromUtf8("Dialog")) Dialog.resize(400, 300) self.form = Dialog self.label = QtGui.QLabel(Dialog) self.label.setGeometry(QtCore.QRect(180, 60, 54, 12)) self.label.setObjectName(_fromUtf8("label")) self.pushButton = QtGui.QPushButton(Dialog) self.pushButton.setGeometry(QtCore.QRect(160, 140, 75, 23)) self.pushButton.setObjectName(_fromUtf8("pushButton")) self.retranslateUi(Dialog) QtCore.QMetaObject.connectSlotsByName(Dialog) #信号连接到指定槽 self.pushButton.clicked.connect(self.on_pushButton_clicked) def retranslateUi(self, Dialog): Dialog.setWindowTitle(_translate("Dialog", "Dialog", None)) self.label.setText(_translate("Dialog", "dialog2", None)) self.pushButton.setText(_translate("Dialog", "返回主窗体", None)) def on_pushButton_clicked(self): self.form .close() if __name__ == "__main__": import sys app = QtGui.QApplication(sys.argv) Dialog = QtGui.QDialog() ui = Dialog2() ui.setupUi(Dialog) Dialog.show() sys.exit(app.exec_())

按钮绑定到新弹出界面的处理函数，使用的槽连接方式为：

self.pushButton.clicked.connect(self.on_pushButton_clicked)

如果是Menu项绑定到新弹出界面的处理函数，则应使用的槽连接方式为：

QtCore.QObject.connect(self.set_value_menu, QtCore.SIGNAL(_fromUtf8("triggered()")), self.open_set_value_form)

二者使用的槽处理函数基本一致。
若不显示原界面，只需将原界面hide()即可，如：

self.form.hide()

若需在弹出新窗口时同时原窗口保持可见，则不需这一步。且在这种情况下，若要原窗口可选为顶层窗体，则在显示新窗口时应使用show()：

Form1.show()

若新窗口为固定的顶层窗体，原窗体被遮盖，则应使用exec_()：

Form1.exec_()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。