如何向 pyqt 5 gui 添加滚动条？答案

【问题标题】：How to add a scrollbar to pyqt 5 gui?如何向 pyqt 5 gui 添加滚动条？
【发布时间】：2019-07-23 09:29:53
【问题描述】：

我创建了一个带有控制器文件的 gui 来在窗口之间切换。这些文件包括几个参数，这些参数将由以前的窗口设置，因此，大小可能非常大。因此，我需要创建一个滚动条才能到达最后一个元素，但想知道如何在我的代码中实现这一点。

来自控制器.py

import sys
from PyQt5 import QtCore, QtWidgets

from firstwindow import Login
class Controller:

    def __init__(self):
        pass

    def show_login(self):
        self.login = Login()
        self.login.switch_window.connect(self.show_main)
        self.login.show()

    def show_main(self):
        self.MAP                   = self.login.MAP
        #Parameters from file
        self.NUM                    = self.login.spinBoxNUM.value()
        self.login.close()


def main():
    app = QtWidgets.QApplication(sys.argv)
    controller = Controller()
    controller.show_login()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

并从登录类文件中：第一个窗口.py

import sys
from PyQt5 import QtCore, QtWidgets, QtGui

class Login(QtWidgets.QWidget):

    switch_window = QtCore.pyqtSignal()

    def __init__(self):
        QtWidgets.QWidget.__init__(self)
        self.setupUi(self)
        self.setWindowTitle('First')

    def setupUi(self, FirstWindow):
        FirstWindow.setObjectName("First")
        FirstWindow.setEnabled(True)
        FirstWindow.resize(675,776)

        FirstWindow.setFocusPolicy(QtCore.Qt.TabFocus)

        layout = QtWidgets.QGridLayout()
        #Lots of elements + buttons: example:
        self.spinBoxNUM = QtWidgets.QSpinBox()
        layout.addWidget(self.spinBoxNUM,1,2)
        self.spinBoxLEVELS  = QtWidgets.QSpinBox()
        self.spinBoxLEVELS.setValue(2)
        self.spinBoxLEVELS.setMaximum(156)
        layout.addWidget(self.spinBoxLEVELS,11,2)

        #CONTINUE AND QUIT BUTTON
        self.QuitButton      = QtWidgets.QPushButton("Quit")
        self.QContinueButton = QtWidgets.QPushButton("Continue")
        #actions
        self.QuitButton.clicked.connect(FirstWindow.close)
        self.QContinueButton.clicked.connect(self.login)
        layout.addWidget(self.QuitButton,15,1)
        layout.addWidget(self.QContinueButton,15,2)

        self.setLayout(layout)
     def login(self):
        self.MAP    = [[1 for x in range(4)]for y in range(self.LEVELS)]
        self.switch_window.emit()

【问题讨论】：

对不起，我对此很陌生，我应该做更多的最小还是可重现的问题？
为了向您推荐一些东西，我需要运行您的示例并重现问题。我如何运行您的示例？
谢谢，我相信它现在已经修复了:)

标签： python user-interface pyqt5 scrollbar

【解决方案1】：

试试看：

import sys
from PyQt5 import QtCore, QtGui, QtWidgets

#from firstwindow import Login
class Login(QtWidgets.QWidget): 

    switch_window = QtCore.pyqtSignal()

    def __init__(self):
        QtWidgets.QWidget.__init__(self)
        self.setupUi(self)
        self.setWindowTitle('First')

    def setupUi(self, FirstWindow):
        FirstWindow.setObjectName("First")
        FirstWindow.setEnabled(True)
        FirstWindow.resize(675, 776)

        FirstWindow.setFocusPolicy(QtCore.Qt.TabFocus)


        #Lots of elements + buttons: example:
        self.spinBoxNUM = QtWidgets.QSpinBox()
        self.spinBoxLEVELS  = QtWidgets.QSpinBox()
        self.spinBoxLEVELS.setValue(2)
        self.spinBoxLEVELS.setMaximum(156)

        #CONTINUE AND QUIT BUTTON
        self.QuitButton      = QtWidgets.QPushButton("Quit")
        self.QContinueButton = QtWidgets.QPushButton("Continue")
        #actions
        self.QuitButton.clicked.connect(FirstWindow.close)
        self.QContinueButton.clicked.connect(self.login)


        layout = QtWidgets.QGridLayout()
        layout.addWidget(self.spinBoxNUM,      1, 2)
        layout.addWidget(self.spinBoxLEVELS,  11, 2)
        layout.addWidget(self.QuitButton,     15, 1)
        layout.addWidget(self.QContinueButton,15, 2)

        self.setLayout(layout)

    def login(self):
        self.MAP    = [[1 for x in range(4)]for y in range(7)]     # ??? (self.LEVELS)]
        self.switch_window.emit()

    def sizeHint(self):                                            # <--- sizeHint
        return QtCore.QSize(700, 500)



#class Controller:
class Controller(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.show_login()

    def show_login(self):
        self.login = Login()

        self.scrollArea = QtWidgets.QScrollArea()                   # +++
        self.scrollArea.setWidget(self.login)                       # +++

        self.login.switch_window.connect(self.show_main)

        self.scrollArea.show()                                      # +++
        self.scrollArea.resize(700, 500)                            # +++
#        self.login.show()

    def show_main(self):
        self.MAP                   = self.login.MAP
        #Parameters from file
        self.NUM                    = self.login.spinBoxNUM.value()

#        self.login.close()
        self.scrollArea.hide()                                       # +++
        self.show()                                                  # +++


def main():
    app = QtWidgets.QApplication(sys.argv)
    controller = Controller()
    controller.setWindowTitle("Controller")
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

【讨论】：