• 将.ui文件转换为.py文件

python3 -m PyQt5.uic.pyuic untitled.ui -o untitled.py

• 界面和逻辑分离

  创建逻辑文件.py，继承界面文件的主窗口类，这样便可实现界面和逻辑的分离。当需要更新界面时，只需要对界面文件.ui进行更新，再转换为对应的.py文件即可

• 示例程序1

#导入相关子模块
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
 
import sys

# Subclass QMainWindow to customise your application's main window
# 通过子类化QMainwindow来自定义应用程序主窗口
class MainWindow(QMainWindow):
 
     def __init__(self, *args, **kwargs):
         super(MainWindow, self).__init__(*args, **kwargs)
         
         self.setWindowTitle("My Awesome App")  #设置窗口标题
         
         label = QLabel("THIS IS AWESOME!!!")
 
         # The `Qt` namespace has a lot of attributes to customise
         # widgets. See: http://doc.qt.io/qt-5/qt.html
         label.setAlignment(Qt.AlignCenter)   
         
         # Set the central widget of the Window. Widget will expand
         # to take up all the space in the window by default.
         self.setCentralWidget(label)

#每个应用程序需要且仅需要一个QApplication实例，传入sys.argv以允许应用程序访问命令行参数
app = QApplication(sys.argv)

window = QMainWindow() #每个应用程序至少有一个QMainWindow
window.show() # window默认处于关闭状态
 
# 开始事件循环（event loop）
app.exec_()

• 示例程序2

#!/usr/bin/python3

import sys
import os
from PyQt5 import QtWidgets, QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class picture(QWidget):
    def __init__(self):
        super(picture, self).__init__()

        self.resize(860, 360)
        self.setWindowTitle("WSCL")

        self.label = QLabel(self)
        self.label.setText("pre_image")
        self.label.move(130, 30)


        self.label2 = QLabel(self)
        #self.label2.setText("pre_image")
        self.label2.setFixedSize(300, 200)
        self.label2.move(30, 60)

        self.label2.setStyleSheet("QLabel{background:white;}"
                                 )
        self.label3 = QLabel(self)
        self.label3.setText("results")
        self.label3.move(520, 30)

        self.label4 = QLabel(self)
        #self.label4.setText("results")
        self.label4.setFixedSize(300, 200)
        self.label4.move(430, 60)

        self.label4.setStyleSheet("QLabel{background:white;}")

        btn = QPushButton(self)
        btn.setText("open")
        btn.move(130, 300)
        btn.clicked.connect(self.openimage)

        btn = QPushButton(self)
        btn.setText("start")
        btn.move(320, 300)
        btn.clicked.connect(self.dectimage)

        btn = QPushButton(self)
        btn.setText("close")
        btn.move(520, 300)
        btn.clicked.connect(self.close)

    def openimage(self):
        global imgName
        imgName, imgType = QFileDialog.getOpenFileName(self, "open", "", "*.jpg;;*.png;;All Files(*)")
        jpg = QtGui.QPixmap(imgName).scaled(self.label2.width(), self.label2.height())
        self.label2.setPixmap(jpg)
        #self.statusbar.showMessage(imgName)

    def dectimage(self):
    
        print(imgName)
        #os.system(echo imgName)
        os.system('pwd')
        os.environ['imgName'] = str(imgName)
        os.system('echo $imgName')
        os.system('./experiments/scripts/test.sh 0 pascal_voc  vgg16 voc12_wsdnn_pre $imgName')
        #./experiments/scripts/test.sh 0 pascal_voc  vgg16 voc12_wsdnn_pre /home/amax/Pictures/4.jpg

        rawimgName=imgName.split("/")[4].split(".")[0]
        newimgpath='/home/amax/WSCL_vgg16_voc12_wsdnn_pre/cache/voc_2007_test/default/vgg16_faster_rcnn_iter_200000/faster/detections/'+ rawimgName +'.jpg'
        
        jpg2 = QtGui.QPixmap(newimgpath).scaled(self.label4.width(), self.label4.height())
        self.label4.setPixmap(jpg2)




if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    my = picture()
    my.show()
    sys.exit(app.exec_())