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问PyQt5图形用户界面运行时没有错误，但没有出现窗口
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Stack Overflow用户

提问于 2017-07-12 04:26:49

回答 2查看 3.2K关注 0票数 1

问题是，当我在添加资源文件和添加带有边框图像的PushButtons之后运行mainwindow图形用户界面时，PyQt5不会启动，也没有错误。

我使用以下命令将主窗口UI转换为Python：

pyuic5 mainWindow.iu -o mainWindow.py

这就是python中的mainWindow。

from PyQt5 import QtCore, QtGui, QtWidgets
import resources_rc
#import sys
#import random
#import matplotlib
#matplotlib.use("Qt5Agg")
#from PyQt5 import QtCore
#from PyQt5.QtWidgets import QApplication, QMainWindow, QMenu, QVBoxLayout, QSizePolicy, QMessageBox, QWidget
#from numpy import arange, sin, pi
#from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
#from matplotlib.figure import Figure
#from matplotlib import pyplot as plt

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1108, 672)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setStyleSheet("background-color: rgb(211, 211, 211);")
        MainWindow.setIconSize(QtCore.QSize(40, 40))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalScrollBar = QtWidgets.QScrollBar(self.centralwidget)
        self.verticalScrollBar.setGeometry(QtCore.QRect(1050, 0, 21, 611))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.MinimumExpanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.verticalScrollBar.sizePolicy().hasHeightForWidth())
        self.verticalScrollBar.setSizePolicy(sizePolicy)
        self.verticalScrollBar.setOrientation(QtCore.Qt.Vertical)
        self.verticalScrollBar.setObjectName("verticalScrollBar")
        self.horizontalScrollBar = QtWidgets.QScrollBar(self.centralwidget)
        self.horizontalScrollBar.setGeometry(QtCore.QRect(0, 610, 1051, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.horizontalScrollBar.sizePolicy().hasHeightForWidth())
        self.horizontalScrollBar.setSizePolicy(sizePolicy)
        self.horizontalScrollBar.setOrientation(QtCore.Qt.Horizontal)
        self.horizontalScrollBar.setObjectName("horizontalScrollBar")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(900, -30, 151, 141))
        self.label.setStyleSheet("border-image: url(:/img/NM_State_University_logo.png);")
        self.label.setText("")
        self.label.setObjectName("label")
        self.house1 = QtWidgets.QPushButton(self.centralwidget)
        self.house1.setGeometry(QtCore.QRect(31, 31, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house1.sizePolicy().hasHeightForWidth())
        self.house1.setSizePolicy(sizePolicy)
        self.house1.setAutoFillBackground(False)
        self.house1.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house1.setText("")
        self.house1.setObjectName("house1")
        self.house2 = QtWidgets.QPushButton(self.centralwidget)
        self.house2.setGeometry(QtCore.QRect(258, 31, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house2.sizePolicy().hasHeightForWidth())
        self.house2.setSizePolicy(sizePolicy)
        self.house2.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house2.setText("")
        self.house2.setObjectName("house2")
        self.house3 = QtWidgets.QPushButton(self.centralwidget)
        self.house3.setGeometry(QtCore.QRect(484, 31, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house3.sizePolicy().hasHeightForWidth())
        self.house3.setSizePolicy(sizePolicy)
        self.house3.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house3.setText("")
        self.house3.setObjectName("house3")
        self.house4 = QtWidgets.QPushButton(self.centralwidget)
        self.house4.setGeometry(QtCore.QRect(711, 31, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house4.sizePolicy().hasHeightForWidth())
        self.house4.setSizePolicy(sizePolicy)
        self.house4.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house4.setText("")
        self.house4.setIconSize(QtCore.QSize(40, 40))
        self.house4.setObjectName("house4")
        self.house6 = QtWidgets.QPushButton(self.centralwidget)
        self.house6.setGeometry(QtCore.QRect(258, 200, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house6.sizePolicy().hasHeightForWidth())
        self.house6.setSizePolicy(sizePolicy)
        self.house6.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house6.setText("")
        self.house6.setObjectName("house6")
        self.house5 = QtWidgets.QPushButton(self.centralwidget)
        self.house5.setGeometry(QtCore.QRect(31, 200, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house5.sizePolicy().hasHeightForWidth())
        self.house5.setSizePolicy(sizePolicy)
        self.house5.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house5.setText("")
        self.house5.setObjectName("house5")
        self.house9 = QtWidgets.QPushButton(self.centralwidget)
        self.house9.setGeometry(QtCore.QRect(31, 368, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house9.sizePolicy().hasHeightForWidth())
        self.house9.setSizePolicy(sizePolicy)
        self.house9.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house9.setText("")
        self.house9.setObjectName("house9")
        self.house7 = QtWidgets.QPushButton(self.centralwidget)
        self.house7.setGeometry(QtCore.QRect(484, 200, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house7.sizePolicy().hasHeightForWidth())
        self.house7.setSizePolicy(sizePolicy)
        self.house7.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house7.setText("")
        self.house7.setObjectName("house7")
        self.house8 = QtWidgets.QPushButton(self.centralwidget)
        self.house8.setGeometry(QtCore.QRect(711, 200, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house8.sizePolicy().hasHeightForWidth())
        self.house8.setSizePolicy(sizePolicy)
        self.house8.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house8.setText("")
        self.house8.setIconSize(QtCore.QSize(70, 20))
        self.house8.setAutoDefault(True)
        self.house8.setObjectName("house8")
        self.house11 = QtWidgets.QPushButton(self.centralwidget)
        self.house11.setGeometry(QtCore.QRect(484, 368, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house11.sizePolicy().hasHeightForWidth())
        self.house11.setSizePolicy(sizePolicy)
        self.house11.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house11.setText("")
        self.house11.setObjectName("house11")
        self.house10 = QtWidgets.QPushButton(self.centralwidget)
        self.house10.setGeometry(QtCore.QRect(258, 368, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house10.sizePolicy().hasHeightForWidth())
        self.house10.setSizePolicy(sizePolicy)
        self.house10.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house10.setText("")
        self.house10.setObjectName("house10")
        self.house12 = QtWidgets.QPushButton(self.centralwidget)
        self.house12.setGeometry(QtCore.QRect(711, 368, 32, 16))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.house12.sizePolicy().hasHeightForWidth())
        self.house12.setSizePolicy(sizePolicy)
        self.house12.setStyleSheet("border-image: url(:/img/Crystal_Clear_app_kfm_home.png);")
        self.house12.setText("")
        self.house12.setObjectName("house12")
    #####################################Power Plot House 1
        self.PowPlotHouse1 = QtWidgets.QWidget(self.centralwidget)
        self.PowPlotHouse1.setGeometry(QtCore.QRect(70, 30, 171, 121))
        self.PowPlotHouse1.setObjectName("PowPlotHouse1")
    #####################END of widge
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1108, 21))
        self.menubar.setObjectName("menubar")
        self.menuFile = QtWidgets.QMenu(self.menubar)
        self.menuFile.setObjectName("menuFile")
        self.menuEdit = QtWidgets.QMenu(self.menubar)
        self.menuEdit.setObjectName("menuEdit")
        self.menuOptions = QtWidgets.QMenu(self.menubar)
        self.menuOptions.setObjectName("menuOptions")
        self.menuAdmin = QtWidgets.QMenu(self.menubar)
        self.menuAdmin.setObjectName("menuAdmin")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.actionSave = QtWidgets.QAction(MainWindow)
        self.actionSave.setObjectName("actionSave")
        self.actionSave_As = QtWidgets.QAction(MainWindow)
        self.actionSave_As.setObjectName("actionSave_As")
        self.menuFile.addAction(self.actionSave)
        self.menuFile.addAction(self.actionSave_As)
        self.menubar.addAction(self.menuFile.menuAction())
        self.menubar.addAction(self.menuEdit.menuAction())
        self.menubar.addAction(self.menuOptions.menuAction())
        self.menubar.addAction(self.menuAdmin.menuAction())

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.menuFile.setTitle(_translate("MainWindow", "File"))
        self.menuEdit.setTitle(_translate("MainWindow", "Edit"))
        self.menuOptions.setTitle(_translate("MainWindow", "Options"))
        self.menuAdmin.setTitle(_translate("MainWindow", "Admin"))
        self.actionSave.setText(_translate("MainWindow", "Save"))
        self.actionSave_As.setText(_translate("MainWindow", "Save As"))

import resources_rcenter

我用以下方式转换了我的资源文件：

pyrcc5 resources.qrc -o resources_rc.py

和我的资源文件内容

 <RCC>
  <qresource prefix="newPrefix">
    <file>img/Crystal_Clear_app_kfm_home.png</file>
    <file>img/Gohomenew.png</file>
    <file>img/NM_State_University_logo.png</file>
    <file>img/NMlogo_1colorstate_black.png</file>
    <file>img/NMSU.png</file>
    <file>img/Search_in_home.png</file>
  </qresource>
</RCC>

这是尝试运行它时的结果。

我想写一个异常，看看它是否捕捉到了什么。

python

pyqt

pyqt5

qpushbutton

回答 2

Stack Overflow用户

回答已采纳

发布于 2017-07-12 04:48:30

问题是您使用的路径不正确，这是由您没有添加的前缀造成的。

例如，您必须更改：

self.label.setStyleSheet("border-image: url(:/img/NM_State_University_logo.png);")

至：

self.label.setStyleSheet("border-image: url(:/newPrefix/img/NM_State_University_logo.png);")

但上面的代码可能会很繁琐，更好的方法是将前缀更改为"/"，在这种情况下，它应该如下所示：

<RCC>
  <qresource prefix="/">
    <file>img/Crystal_Clear_app_kfm_home.png</file>
    <file>img/Gohomenew.png</file>
    <file>img/NM_State_University_logo.png</file>
    <file>img/NMlogo_1colorstate_black.png</file>
    <file>img/NMSU.png</file>
    <file>img/Search_in_home.png</file>
  </qresource>
</RCC>

然后用pyrcc5 resources.qrc -o resources_rc.py重新编译。

另一个问题是，对于要在pyqt中启动的应用程序，您必须创建该应用程序，为此，我建议在文件mainWindow.py中添加以下内容：

if __name__ == "__main__":

    app = QtWidgets.QApplication(sys.argv)
    w = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(w)
    w.show()
    sys.exit(app.exec_())

票数 2

Stack Overflow用户

发布于 2017-07-12 04:44:31

更正输入错误的resources_rc，不要忘记创建main.py文件来调用MainWindow.py。

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

class Main(QMainWindow):
    def __init__(self):
        super().__init__()
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.show()


def main():
    app = QApplication(sys.argv)
    instance = Main()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

然后运行main.py

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/45043904

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