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python中的yolov5结合PyQt5，使用QT designer设计界面没正确启动的解决方法

一、窗体设计test:

默认你已经设计好了窗体后：

这时你需要的是保存生成的untitle.ui到某个文件夹下，然后在命令行中奖.ui转换为.py（，通过​​pyqt5​​​提供的转换工具，将​​ui​​​文件转换成​​python​​的代码）

pyuic5.bat -o main.py untitled.ui

或者使用在PyCharm中安装的工具：

然后你会看到main.py中的代码发生了变化，这时你想通过命令去运气起来，发现运行没有反应，遇
到问题，解决方法如下：

在该转变的main.py文件内部加入以下的代码：

如果加入后提示缺少某个引入的参数，添加上即可

if __name__ == '__main__':import sysapp = QtWidgets.QApplication(sys.argv)ui = Ui_MainWindow()mainWindow = QtWidgets.QMainWindow()ui.setupUi(mainWindow)mainWindow.show()sys.exit(app.exec())

我的测试的转变后的代码案例如下：

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!
import sysfrom PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_MainWindow(object):def setupUi(self, MainWindow):MainWindow.setObjectName("MainWindow")MainWindow.resize(977, 861)MainWindow.setUnifiedTitleAndToolBarOnMac(False)self.centralwidget = QtWidgets.QWidget(MainWindow)self.centralwidget.setObjectName("centralwidget")self.widget = QtWidgets.QWidget(self.centralwidget)self.widget.setGeometry(QtCore.QRect(18, 5, 1175, 811))self.widget.setObjectName("widget")self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.widget)self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)self.horizontalLayout_2.setObjectName("horizontalLayout_2")self.verticalLayout_2 = QtWidgets.QVBoxLayout()self.verticalLayout_2.setContentsMargins(30, 1, 30, 0)self.verticalLayout_2.setObjectName("verticalLayout_2")self.pushButton = QtWidgets.QPushButton(self.widget)sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)sizePolicy.setHorizontalStretch(6)sizePolicy.setVerticalStretch(6)sizePolicy.setHeightForWidth(self.pushButton.sizePolicy().hasHeightForWidth())self.pushButton.setSizePolicy(sizePolicy)self.pushButton.setMinimumSize(QtCore.QSize(0, 120))self.pushButton.setMaximumSize(QtCore.QSize(16777215, 23))font = QtGui.QFont()font.setFamily("Arial")font.setPointSize(22)font.setBold(False)font.setItalic(False)font.setUnderline(False)font.setWeight(50)self.pushButton.setFont(font)self.pushButton.setAutoDefault(False)self.pushButton.setObjectName("pushButton")self.verticalLayout_2.addWidget(self.pushButton)self.pushButton_2 = QtWidgets.QPushButton(self.widget)self.pushButton_2.setMinimumSize(QtCore.QSize(0, 120))font = QtGui.QFont()font.setFamily("Arial")font.setPointSize(22)font.setBold(False)font.setWeight(50)self.pushButton_2.setFont(font)self.pushButton_2.setObjectName("pushButton_2")self.verticalLayout_2.addWidget(self.pushButton_2)self.horizontalLayout_2.addLayout(self.verticalLayout_2)self.label = QtWidgets.QLabel(self.widget)self.label.setObjectName("label")self.horizontalLayout_2.addWidget(self.label)self.horizontalLayout_2.setStretch(0, 1)self.horizontalLayout_2.setStretch(1, 3)MainWindow.setCentralWidget(self.centralwidget)self.menubar = QtWidgets.QMenuBar(MainWindow)self.menubar.setGeometry(QtCore.QRect(0, 0, 977, 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.translateMainWindow.setWindowTitle(_translate("MainWindow", "示功图模型识别"))self.pushButton.setText(_translate("MainWindow", "图片检测"))self.pushButton_2.setText(_translate("MainWindow", "视频检测"))self.label.setText(_translate("MainWindow", "TextLabel"))if __name__ == '__main__':import sysapp = QtWidgets.QApplication(sys.argv)ui = Ui_MainWindow()mainWindow = QtWidgets.QMainWindow()ui.setupUi(mainWindow)mainWindow.show()sys.exit(app.exec())

运行后的界面展示：