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 sys

    app = 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 sys

from PyQt5 import QtCore, QtGui, QtWidgets


class 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.translate
        MainWindow.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 sys

    app = 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：