pyqt使用命令记录

1. 首先打开qt designer，安装过程不赘诉，在安装完毕并添加到命令行之后。命令行输入。
   . designer.exe
2. 在qt designer新建ui文件并保存。
3. 将ui文件编译成所需要的py文件

pyuic5 -o OnlineUpdateUI.py Online-Update.ui

4. 为了方便今后ui文件的添加与修改，不推荐直接在生成的.py文件上进行开发，这里使用继承的方式来降低耦合性，在一定程度上实现分离。
   这是我生成的OnlineUpdateUI.py文件

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

# Form implementation generated from reading ui file 'Online-Update.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(406, 343)
        self.UpdateButton = QtWidgets.QPushButton(Form)
        self.UpdateButton.setGeometry(QtCore.QRect(260, 320, 131, 21))
        self.UpdateButton.setObjectName("UpdateButton")
        self.showup_textEdit = QtWidgets.QTextEdit(Form)
        self.showup_textEdit.setGeometry(QtCore.QRect(10, 70, 381, 241))
        self.showup_textEdit.setObjectName("showup_textEdit")
        self.NodeIPEdit = QtWidgets.QLineEdit(Form)
        self.NodeIPEdit.setGeometry(QtCore.QRect(250, 10, 131, 20))
        self.NodeIPEdit.setObjectName("NodeIPEdit")
        self.Node_IP = QtWidgets.QLabel(Form)
        self.Node_IP.setGeometry(QtCore.QRect(200, 10, 51, 21))
        self.Node_IP.setObjectName("Node_IP")
        self.local_IP = QtWidgets.QLabel(Form)
        self.local_IP.setGeometry(QtCore.QRect(10, 10, 51, 21))
        self.local_IP.setObjectName("local_IP")
        self.LocalIP_Edit = QtWidgets.QLineEdit(Form)
        self.LocalIP_Edit.setGeometry(QtCore.QRect(60, 10, 131, 20))
        self.LocalIP_Edit.setObjectName("LocalIP_Edit")
        self.label = QtWidgets.QLabel(Form)
        self.label.setGeometry(QtCore.QRect(10, 40, 54, 12))
        self.label.setObjectName("label")
        self.FileNamelineEdit = QtWidgets.QLineEdit(Form)
        self.FileNamelineEdit.setGeometry(QtCore.QRect(60, 40, 321, 20))
        self.FileNamelineEdit.setObjectName("FileNamelineEdit")

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.UpdateButton.setText(_translate("Form", "更新"))
        self.Node_IP.setText(_translate("Form", "节点IP："))
        self.local_IP.setText(_translate("Form", "本机IP："))
        self.label.setText(_translate("Form", "文件名："))

5. main.py
   这是main.py文件的模板，未全部上传代码，不过可以很清楚的看到槽函数的连接过程，删除不需要的一些代码之后可以直接运行。

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from OnlineUpdateUI import Ui_Form
 
 
class Demo(QWidget, Ui_Form):
    def __init__(self):
        super(Demo, self).__init__()
        self.setupUi(self)                                          # 1
        #self.text_edit.textChanged.connect(self.show_text_func)     # 2
        self.UpdateButton.clicked.connect(self.update_button_func)
        self.workThread = WorkThread()
        self.workThread.getreturn.connect(self.showmessage)

        #设置默认的IP
        self.LocalIP_Edit.setText(self.workThread.master_ip)
        self.NodeIPEdit.setText(self.workThread.host_ip)
        self.FileNamelineEdit.setText(self.workThread.filename)
        self.showup_textEdit.append("操作步骤：")
        self.showup_textEdit.append("1. 将编译好的文件放入所在FTP文件夹")
        self.showup_textEdit.append("2. 填写好IP及文件夹名称（不填则使用默认IP及文件名）")


    def showmessage(self,message):
        self.showup_textEdit.append(message)
 

    def update_button_func(self):
        print("button pressed!")
        str_localIP = self.LocalIP_Edit.text()
        str_nodeIP = self.NodeIPEdit.text()
        str_filename = self.FileNamelineEdit.text()
        self.workThread.master_ip = str_localIP
        self.workThread.host_ip = str_nodeIP
        self.workThread.filename = str_filename

        print("本机IP和节点IP分别为：",str_localIP,str_nodeIP)
        self.showup_textEdit.append("你好主机！ IP:" + str_localIP)
        self.showup_textEdit.append("你好节点！ IP：" + str_nodeIP)
        self.workThread.start()

 
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    demo = Demo()
    demo.show()
    sys.exit(app.exec_())