pyqt 多窗口之间的相互调用方法

*在编程开发中，一个程序不可避免的需要多窗口操作来实现具体的功能。实现此功能的基

* 在编程开发中，一个程序不可避免的需要多窗口操作来实现具体的功能。

实现此功能的基本步骤（以三个窗口为例，使用主窗口调用其它两个窗口）

# 主窗口
from PyQt5 import QtCore, QtGui, QtWidgets
 
class Ui_MainWindow(object):
 def setupUi(self, MainWindow):
 MainWindow.setObjectName("MainWindow")
 MainWindow.resize(800, 600)
 self.centralwidget = QtWidgets.QWidget(MainWindow)
 self.centralwidget.setObjectName("centralwidget")
 
 self.pushButton = QtWidgets.QPushButton(self.centralwidget)
 self.pushButton.setGeometry(QtCore.QRect(70, 180, 75, 23))
 self.pushButton.setObjectName("pushButton")
 
 self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
 self.pushButton_2.setGeometry(QtCore.QRect(250, 180, 75, 23))
 self.pushButton_2.setObjectName("pushButton_2")
 
 MainWindow.setCentralWidget(self.centralwidget)
 self.menubar = QtWidgets.QMenuBar(MainWindow)
 self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
 self.menubar.setObjectName("menubar")
 MainWindow.setMenuBar(self.menubar)
 self.statusbar = QtWidgets.QStatusBar(MainWindow)
 self.statusbar.setObjectName("statusbar")
 MainWindow.setStatusBar(self.statusbar)
 
 self.retranslateUi(MainWindow)
 QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
 def retranslateUi(self, MainWindow):
 _translate = QtCore.QCoreApplication.translate
 MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
 self.pushButton.setText(_translate("MainWindow", "打开窗口1"))
 self.pushButton_2.setText(_translate("MainWindow", "打开窗口2 "))
 
# 窗口1
class Ui_Dialog(object):
 def setupUi(self, Dialog):
 Dialog.setObjectName("Dialog")
 Dialog.resize(400, 300)
 self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
 self.buttonBox.setGeometry(QtCore.QRect(30, 240, 341, 32))
 self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
 self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
 self.buttonBox.setObjectName("buttonBox")
 self.label = QtWidgets.QLabel(Dialog)
 self.label.setGeometry(QtCore.QRect(140, 100, 54, 12))
 self.label.setObjectName("label")
 
 self.retranslateUi(Dialog)
 self.buttonBox.accepted.connect(Dialog.accept)
 self.buttonBox.rejected.connect(Dialog.reject)
 QtCore.QMetaObject.connectSlotsByName(Dialog)
 
 def retranslateUi(self, Dialog):
 _translate = QtCore.QCoreApplication.translate
 Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
 self.label.setText(_translate("Dialog", "这是窗口1"))
# 窗口2
 
class Ui_Form(object):
 def setupUi(self, Form):
 Form.setObjectName("Form")
 Form.resize(400, 300)
 self.label = QtWidgets.QLabel(Form)
 self.label.setGeometry(QtCore.QRect(140, 140, 54, 12))
 self.label.setObjectName("label")
 
 self.retranslateUi(Form)
 QtCore.QMetaObject.connectSlotsByName(Form)
 
 def retranslateUi(self, Form):
 _translate = QtCore.QCoreApplication.translate
 Form.setWindowTitle(_translate("Form", "Form"))
 self.label.setText(_translate("Form", "这是窗口2"))
 

主程序入口：

# 主程序
class MainWindow(QMainWindow, untitled.Ui_MainWindow):
 def __init__(self):
 super(MainWindow, self).__init__()
 self.setupUi(self)
 self.window2 = Ui_Dialog()
 self.window2.setupUi()
 self.window3 = Ui_Form()
 self.window3.setupUi()
 self.pushButton.clicked.connect(self.window2.show)# 绑定窗口2 
 self.pushButton_2.clicked.connect(self.window3.show) # 绑定窗口3
 
 
if __name__ == '__main__':
 app = QApplication(sys.argv)
 MainWindow = MainWindow()
 MainWindow.show()
 sys.exit(app.exec_())

以上实现主窗口通过按钮弹出窗口1和窗口2

下面实现通过窗口按钮打开文件资源管理器，实现获取文件相关信息的功能：

1. 在主窗口中添加一个按钮：

class Ui_MainWindow(object):
 def setupUi(self, MainWindow):
 ......
 self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
 self.pushButton_3.setGeometry(QtCore.QRect(420, 180, 75, 23))
 self.pushButton_3.setObjectName("pushButton_3")
 def retranslateUi(self, MainWindow):
 ......
 self.pushButton_3.setText(_translate("MainWindow", "打开目录"))

2.主程序中添加：

# 主程序
class MainWindow(QMainWindow, untitled.Ui_MainWindow):
 def __init__(self):
 super(MainWindow, self).__init__()
 self.setupUi(self)
 self.window2 = Ui_Dialog()
 self.Window2.setupUi()
 self.window3 = Ui_Form()
 self.Window3.setupUi()
 self.pushButton.clicked.connect(self.window2.show)# 绑定窗口2 
 self.pushButton_2.clicked.connect(self.window3.show) # 绑定窗口3
 
 self.pushButton_3.clicked.connect(self.gefilename) # 新增加的
 # 新增加的
 def gefilename(self):
 filename = QFileDialog.getOpenFileName()
 return filename
 
 
if __name__ == '__main__':
 app = QApplication(sys.argv)
 MainWindow = MainWindow()
 MainWindow.show()
 sys.exit(app.exec_())

即可完成上述功能。

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