PyQT实现多窗口切换

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):
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