Windows之间的PyQt5切换

Question

我想创建基于图块的菜单。现在，我需要PyQt5概念如何将MainWindow切换到Window1 / Window2 / ...，并将后退选项切换到MainWindow。我唯一要做的就是在顶部打开一个新窗口。我宁愿有单独的窗口，在其中可以定义不同的功能。

from PyQt5 import QtGui
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton
from PyQt5.QtCore import pyqtSlot
import sys

class Window(QMainWindow):
    def __init__(self):
        super().__init__()
        self.title = "App"
        self.top = 100
        self.left = 100
        self.width = 680
        self.height = 500
        self.InitUI()

    def InitUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.top, self.left, self.width, self.height)

        buttonWindow1 = QPushButton('Window1', self)
        buttonWindow1.move(100, 100)
        buttonWindow1.clicked.connect(self.buttonWindow1_onClick)

        buttonWindow2 = QPushButton('Window2', self)
        buttonWindow2.move(100, 200)
        buttonWindow2.clicked.connect(self.buttonWindow2_onClick)

        self.show()

    @pyqtSlot()
    def buttonWindow1_onClick(self):
        self.statusBar().showMessage("Switched to window 1")

    @pyqtSlot()
    def buttonWindow2_onClick(self):
        self.statusBar().showMessage("Switched to window 2")

if __name__ == '__main__':
    app=QApplication(sys.argv)
    ex=Window()
    sys.exit(app.exec_())

Answer 1

尝试一下：

from file2 import Ui_Dialog2 #------>import the class for next window
def buttonWindow1_onClick(self):
    self.window=QtWidgets.QMainWindow()
    self.ui=Ui_Dialog2()      #------------->creating an object 
    self.ui.setupUi(self.window)
    self.window.show()

此处 Ui_Dialog2（）表示您正在为新窗口创建对象（在本例中，是为Window1创建对象以将MainWindow切换为Window1）。单击下一步按钮，此功能被调用，因此将为下一个窗口创建一个对象，然后将打开该窗口。

Answer 2

尝试一下：

import sys
from PyQt5.QtGui     import *
from PyQt5.QtCore    import *
from PyQt5.QtWidgets import *

class Window(QMainWindow):
    def __init__(self):
        super().__init__()
        self.title = "App"
        self.top = 100
        self.left = 100
        self.width = 680
        self.height = 500
        self.InitUI()

    def InitUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.top, self.left, self.width, self.height)

        buttonWindow1 = QPushButton('Window1', self)
        buttonWindow1.move(100, 100)
        buttonWindow1.clicked.connect(self.buttonWindow1_onClick)
        self.lineEdit1 = QLineEdit("Type here what you want to transfer for [Window1].", self)
        self.lineEdit1.setGeometry(250, 100, 400, 30)

        buttonWindow2 = QPushButton('Window2', self)
        buttonWindow2.move(100, 200)
        buttonWindow2.clicked.connect(self.buttonWindow2_onClick)        
        self.lineEdit2 = QLineEdit("Type here what you want to transfer for [Window2].", self)
        self.lineEdit2.setGeometry(250, 200, 400, 30)
        self.show()

    @pyqtSlot()
    def buttonWindow1_onClick(self):
        self.statusBar().showMessage("Switched to window 1")
        self.cams = Window1(self.lineEdit1.text()) 
        self.cams.show()
        self.close()

    @pyqtSlot()
    def buttonWindow2_onClick(self):
        self.statusBar().showMessage("Switched to window 2")
        self.cams = Window2(self.lineEdit2.text()) 
        self.cams.show()
        self.close()


class Window1(QDialog):
    def __init__(self, value, parent=None):
        super().__init__(parent)
        self.setWindowTitle('Window1')
        self.setWindowIcon(self.style().standardIcon(QStyle.SP_FileDialogInfoView))

        label1 = QLabel(value)
        self.button = QPushButton()
        self.button.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Expanding)
        self.button.setIcon(self.style().standardIcon(QStyle.SP_ArrowLeft))
        self.button.setIconSize(QSize(200, 200))

        layoutV = QVBoxLayout()
        self.pushButton = QPushButton(self)
        self.pushButton.setStyleSheet('background-color: rgb(0,0,255); color: #fff')
        self.pushButton.setText('Click me!')
        self.pushButton.clicked.connect(self.goMainWindow)
        layoutV.addWidget(self.pushButton)

        layoutH = QHBoxLayout()
        layoutH.addWidget(label1)
        layoutH.addWidget(self.button)
        layoutV.addLayout(layoutH)
        self.setLayout(layoutV)

    def goMainWindow(self):
        self.cams = Window()
        self.cams.show()
        self.close() 


class Window2(QDialog):
    def __init__(self, value, parent=None):
        super().__init__(parent)
        self.setWindowTitle('Window2')
        self.setWindowIcon(self.style().standardIcon(QStyle.SP_FileDialogInfoView))

        label1 = QLabel(value)
        self.button = QPushButton()
        self.button.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Expanding)
        self.button.setIcon(self.style().standardIcon(QStyle.SP_ArrowLeft))
        self.button.setIconSize(QSize(200, 200))

        layoutV = QVBoxLayout()
        self.pushButton = QPushButton(self)
        self.pushButton.setStyleSheet('background-color: rgb(0,0,255); color: #fff')
        self.pushButton.setText('Click me!')
        self.pushButton.clicked.connect(self.goMainWindow)
        layoutV.addWidget(self.pushButton)

        layoutH = QHBoxLayout()
        layoutH.addWidget(label1)
        layoutH.addWidget(self.button)
        layoutV.addLayout(layoutH)
        self.setLayout(layoutV)

    def goMainWindow(self):
        self.cams = Window()
        self.cams.show()
        self.close()    


if __name__ == '__main__':
    app=QApplication(sys.argv)
    ex=Window()
    sys.exit(app.exec_())