这是个简单的界面，Qtdesigner支持各种界面，支持替换背景添加图标等。

接下来实现一个简单YOLO目标检测界面：

功能：

1、在窗口打开视频或图片进行目标检测，具有中断检测功能：比如检测视频的时候突然打开图片检测，后台就会停止检测，而不是一直执行视频检测。

2、可以输出目标类别，目标中心点，置信度等，此部分为动态生成，每一帧图片开始之前会清空。

步骤：

打开Qt Designer

保存为ui文件，然后将其转换为py文件。

如下：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'GUi.ui'
#
# Created by: PyQt5 UI code generator 5.15.11
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1600, 900)
        MainWindow.setMinimumSize(QtCore.QSize(1600, 900))
        MainWindow.setMaximumSize(QtCore.QSize(1600, 900))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(20, 10, 851, 471))
        self.label.setStyleSheet("background-color: rgb(0, 0, 0);")
        self.label.setObjectName("label")
        self.pushButton_image = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_image.setGeometry(QtCore.QRect(1162, 70, 251, 28))
        self.pushButton_image.setObjectName("pushButton_image")
        self.pushButton_video = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_video.setGeometry(QtCore.QRect(1162, 130, 251, 28))
        self.pushButton_video.setObjectName("pushButton_video")
        self.pushButton_end = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_end.setGeometry(QtCore.QRect(1170, 280, 251, 28))
        self.pushButton_end.setObjectName("pushButton_end")
        self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
        self.tableWidget.setGeometry(QtCore.QRect(20, 521, 400, 300))
        self.tableWidget.setMinimumSize(QtCore.QSize(400, 300))
        self.tableWidget.setMaximumSize(QtCore.QSize(400, 300))
        self.tableWidget.setObjectName("tableWidget")
        self.tableWidget.setColumnCount(3)
        self.tableWidget.setRowCount(0)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(0, item)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(1, item)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(2, item)
        self.line = QtWidgets.QFrame(self.centralwidget)
        self.line.setGeometry(QtCore.QRect(20, 490, 401, 141))
        self.line.setFrameShape(QtWidgets.QFrame.HLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        MainWindow.setCentralWidget(self.centralwidget)
        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", "MainWindow"))
        self.label.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton_image.setText(_translate("MainWindow", "图片"))
        self.pushButton_video.setText(_translate("MainWindow", "视频"))
        self.pushButton_end.setText(_translate("MainWindow", "结束检测"))
        item = self.tableWidget.horizontalHeaderItem(0)
        item.setText(_translate("MainWindow", "目标名称"))
        item = self.tableWidget.horizontalHeaderItem(1)
        item.setText(_translate("MainWindow", "目标中心位置 "))
        item = self.tableWidget.horizontalHeaderItem(2)
        item.setText(_translate("MainWindow", "置信度"))

功能实现：

import sys

import numpy as np

from ultralytics import YOLO
import GUi  
import sys
from PyQt5.QtWidgets import QMessageBox, QFileDialog, QLineEdit
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
import cv2
import sqlite3

cla = {0: 'person',1: 'bicycle',2: 'car',3: 'motorcycle',4: 'airplane',5: 'bus',6: 'train',7: 'truck',8: 'boat',9: 'traffic light',10: 'fire hydrant'}

class Image_open(QMainWindow, GUi.Ui_MainWindow):
    def __init__(self, parent=None):
        super(Image_open, self).__init__(parent)
        # UI界面
        self.Video = False
        self.setupUi(self)
        self.handle_buttons()
        self.model = YOLO(r'C:\Users\hp\Desktop\ChangeYOLOV\yolov8_pt\yolov8n.pt')


    def handle_buttons(self):#初始化绑定按钮，在初始化__initi__时调动
        self.pushButton_image.clicked.connect(self.open_image)
        self.pushButton_video.clicked.connect(self.display_video)
        self.pushButton_end.clicked.connect(self.enddect)

    def enddect(self):#结束检测
        pass

    def open_image(self):#图片检测
        pass

    def display_video(self):#视频检测
        pass

    def closeEvent(self, event):#关闭总窗口之前询问
        reply = QMessageBox.question(self, '退出', "是否要退出该界面？",
                                     QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
        if reply == QMessageBox.Yes:
            self.close()
            event.accept()
        else:
            event.ignore()

效果：

1、图片检测

2、视频检测