PyQt5实现界面跳转

网上关于PyQt5的教程很少，特别是界面跳转这一块儿，自己研究了半天，下来和大家分享一下

一、首先是主界面

 1 # -*- coding: utf-8 -*-
 2 
 3 # Form implementation generated from reading ui file 'Form.ui'
 4 #
 5 # Created by: PyQt5 UI code generator 5.10.1
 6 #
 7 # WARNING! All changes made in this file will be lost!
 8 #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
 9 from PyQt5 import QtCore, QtGui, QtWidgets
10 from PyQt5.QtWidgets import QMainWindow, QApplication
11 import Dialog1
12 import Dialog2
13 import sys
14 
15 
16 class 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
17     def setupUi(self, Form):
18         Form.setObjectName("Form")
19         Form.resize(440, 310)
20         self.form = Form
21         self.btn_d1 = QtWidgets.QPushButton(Form)
22         self.btn_d1.setGeometry(QtCore.QRect(60, 140, 75, 23))
23         self.btn_d1.setObjectName("btn_d1")
24         self.btn_d2 = QtWidgets.QPushButton(Form)
25         self.btn_d2.setGeometry(QtCore.QRect(180, 140, 75, 23))
26         self.btn_d2.setObjectName("btn_d2")
27         self.btn_exit = QtWidgets.QPushButton(Form)
28         self.btn_exit.setGeometry(QtCore.QRect(310, 140, 75, 23))
29         self.btn_exit.setObjectName("btn_exit")
30 
31         self.retranslateUi(Form)
32         QtCore.QMetaObject.connectSlotsByName(Form)
33 
34     def retranslateUi(self, Form):
35         _translate = QtCore.QCoreApplication.translate
36         Form.setWindowTitle(_translate("Form", "Form"))
37         self.btn_d1.setText(_translate("Form", "Demo1"))
38         self.btn_d1.clicked.connect(self.jump_to_demo1)
39         self.btn_d2.setText(_translate("Form", "Demo2"))
40         self.btn_d2.clicked.connect(self.jump_to_demo2)
41         self.btn_exit.setText(_translate("Form", "Exit"))
42         self.btn_exit.clicked.connect(self.exit)
43 
44     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
45         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
46         form1 = QtWidgets.QDialog()
47         ui = Dialog1.Ui_Dialog1()
48         ui.setupUi(form1)
49         form1.show()
50         form1.exec_()
51         self.form.show()
52 
53     def jump_to_demo2(self):
54         self.form.hide()
55         form2 = QtWidgets.QDialog()
56         ui = Dialog2.Ui_Dialog2()
57         ui.setupUi(form2)
58         form2.show()
59         form2.exec_()
60         self.form.show()
61 
62     def exit(self):
63         self.form.close()
64 
65 
66 if __name__ == "__main__":
67     app = QApplication(sys.argv)
68     form = QtWidgets.QWidget()
69     window = Ui_Form()
70     window.setupUi(form)
71     form.show()
72     sys.exit(app.exec_())

二、跳转界面Demo1

 1 # -*- coding: utf-8 -*-
 2 
 3 # Form implementation generated from reading ui file 'Dialog1.ui'
 4 #
 5 # Created by: PyQt5 UI code generator 5.10.1
 6 #
 7 # WARNING! All changes made in this file will be lost!
 8 
 9 from PyQt5 import QtCore, QtGui, QtWidgets
10 
11 class Ui_Dialog1(object):
12     def setupUi(self, Dialog1):
13         Dialog1.setObjectName("Dialog1")
14         Dialog1.resize(400, 300)
15         self.dialog=Dialog1
16         self.pushButton = QtWidgets.QPushButton(Dialog1)
17         self.pushButton.setGeometry(QtCore.QRect(140, 140, 75, 23))
18         self.pushButton.setObjectName("pushButton")
19 
20         self.retranslateUi(Dialog1)
21         QtCore.QMetaObject.connectSlotsByName(Dialog1)
22 
23     def retranslateUi(self, Dialog1):
24         _translate = QtCore.QCoreApplication.translate
25         Dialog1.setWindowTitle(_translate("Dialog1", "Dialog"))
26         self.pushButton.setText(_translate("Dialog1", "Jump to main"))
27         self.pushButton.clicked.connect(self.jump_to_main)
28 
29     def jump_to_main(self):
30         self.dialog.close()

三、跳转界面Demo2

 1 # -*- coding: utf-8 -*-
 2 
 3 # Form implementation generated from reading ui file 'Dialog2.ui'
 4 #
 5 # Created by: PyQt5 UI code generator 5.10.1
 6 #
 7 # WARNING! All changes made in this file will be lost!
 8 
 9 from PyQt5 import QtCore, QtGui, QtWidgets
10 from PyQt5.QtWidgets import QMainWindow, QDialog, QApplication
11 import sys
12 
13 
14 class Ui_Dialog2(object):
15     def setupUi(self, Dialog2):
16         Dialog2.setObjectName("Dialog2")
17         Dialog2.resize(400, 300)
18         self.dialog = Dialog2
19         self.pushButton = QtWidgets.QPushButton(Dialog2)
20         self.pushButton.setGeometry(QtCore.QRect(140, 160, 75, 23))
21         self.pushButton.setObjectName("pushButton")
22 
23         self.retranslateUi(Dialog2)
24         QtCore.QMetaObject.connectSlotsByName(Dialog2)
25 
26     def retranslateUi(self, Dialog2):
27         _translate = QtCore.QCoreApplication.translate
28         Dialog2.setWindowTitle(_translate("Dialog2", "Dialog"))
29         self.pushButton.setText(_translate("Dialog2", "Jump to main"))
30         self.pushButton.clicked.connect(self.go_main)
31 
32     def go_main(self):
33         self.dialog.close()
34 
35 if __name__ == "__main__":
36     app = QApplication(sys.argv)
37     form = QtWidgets.QDialog()
38     ui = Ui_Dialog2()
39     ui.setupUi(form)
40     form.show()
41     sys.exit(app.exec_())