自学教程：PyQt5实现界面(页面)跳转的示例代码

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'Form.ui'## Created by: PyQt5 UI code generator 5.10.1## WARNING! All changes made in this file will be lost!#要注意的是跳转界面第二个必须使用QDialog类，不能使用QWidget，我也不知道为什么，特别注意from PyQt5 import QtCore, QtGui, QtWidgetsfrom PyQt5.QtWidgets import QMainWindow, QApplicationimport Dialog1import Dialog2import sysclass Ui_Form(object): #这是用PyQt Designer生成的代码，很简单的，拖动控件，生成ui文件，然后UIC转换成py文件  def setupUi(self, Form):    Form.setObjectName("Form")    Form.resize(440, 310)    self.form = Form    self.btn_d1 = QtWidgets.QPushButton(Form)    self.btn_d1.setGeometry(QtCore.QRect(60, 140, 75, 23))    self.btn_d1.setObjectName("btn_d1")    self.btn_d2 = QtWidgets.QPushButton(Form)    self.btn_d2.setGeometry(QtCore.QRect(180, 140, 75, 23))    self.btn_d2.setObjectName("btn_d2")    self.btn_exit = QtWidgets.QPushButton(Form)    self.btn_exit.setGeometry(QtCore.QRect(310, 140, 75, 23))    self.btn_exit.setObjectName("btn_exit")    self.retranslateUi(Form)    QtCore.QMetaObject.connectSlotsByName(Form)  def retranslateUi(self, Form):    _translate = QtCore.QCoreApplication.translate    Form.setWindowTitle(_translate("Form", "Form"))    self.btn_d1.setText(_translate("Form", "Demo1"))    self.btn_d1.clicked.connect(self.jump_to_demo1)    self.btn_d2.setText(_translate("Form", "Demo2"))    self.btn_d2.clicked.connect(self.jump_to_demo2)    self.btn_exit.setText(_translate("Form", "Exit"))    self.btn_exit.clicked.connect(self.exit)  def jump_to_demo1(self):    #这一块注意，是重点从主界面跳转到Demo1界面，主界面隐藏，如果关闭Demo界面，主界面进程会触发self.form.show()会再次显示主界面    self.form.hide()      #如果没有self.form.show()这一句，关闭Demo1界面后就会关闭程序    form1 = QtWidgets.QDialog()    ui = Dialog1.Ui_Dialog1()    ui.setupUi(form1)    form1.show()    form1.exec_()    self.form.show()  def jump_to_demo2(self):    self.form.hide()    form2 = QtWidgets.QDialog()    ui = Dialog2.Ui_Dialog2()    ui.setupUi(form2)    form2.show()    form2.exec_()    self.form.show()  def exit(self):    self.form.close()if __name__ == "__main__":  app = QApplication(sys.argv)  form = QtWidgets.QWidget()  window = Ui_Form()  window.setupUi(form)  form.show()  sys.exit(app.exec_())

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'Dialog1.ui'## Created by: PyQt5 UI code generator 5.10.1## WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Dialog1(object):  def setupUi(self, Dialog1):    Dialog1.setObjectName("Dialog1")    Dialog1.resize(400, 300)    self.dialog=Dialog1    self.pushButton = QtWidgets.QPushButton(Dialog1)    self.pushButton.setGeometry(QtCore.QRect(140, 140, 75, 23))    self.pushButton.setObjectName("pushButton")    self.retranslateUi(Dialog1)    QtCore.QMetaObject.connectSlotsByName(Dialog1)  def retranslateUi(self, Dialog1):    _translate = QtCore.QCoreApplication.translate    Dialog1.setWindowTitle(_translate("Dialog1", "Dialog"))    self.pushButton.setText(_translate("Dialog1", "Jump to main"))    self.pushButton.clicked.connect(self.jump_to_main)  def jump_to_main(self):    self.dialog.close()

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'Dialog2.ui'## Created by: PyQt5 UI code generator 5.10.1## WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsfrom PyQt5.QtWidgets import QMainWindow, QDialog, QApplicationimport sysclass Ui_Dialog2(object):  def setupUi(self, Dialog2):    Dialog2.setObjectName("Dialog2")    Dialog2.resize(400, 300)    self.dialog = Dialog2    self.pushButton = QtWidgets.QPushButton(Dialog2)    self.pushButton.setGeometry(QtCore.QRect(140, 160, 75, 23))    self.pushButton.setObjectName("pushButton")    self.retranslateUi(Dialog2)    QtCore.QMetaObject.connectSlotsByName(Dialog2)  def retranslateUi(self, Dialog2):    _translate = QtCore.QCoreApplication.translate    Dialog2.setWindowTitle(_translate("Dialog2", "Dialog"))    self.pushButton.setText(_translate("Dialog2", "Jump to main"))    self.pushButton.clicked.connect(self.go_main)  def go_main(self):    self.dialog.close()if __name__ == "__main__":  app = QApplication(sys.argv)  form = QtWidgets.QDialog()  ui = Ui_Dialog2()  ui.setupUi(form)  form.show()  sys.exit(app.exec_())