一个pyqt5动态加载ui+多线程+信号刷新界面的例子

 

ui代码（用designer设计生成即可）

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>全国富婆通讯录</string>
  </property>
  <widget class="QWidget" name="formLayoutWidget">
   <property name="geometry">
    <rect>
     <x>90</x>
     <y>40</y>
     <width>211</width>
     <height>141</height>
    </rect>
   </property>
   <layout class="QFormLayout" name="formLayout">
    <item row="0" column="1">
     <widget class="QLineEdit" name="lineEdit"/>
    </item>
    <item row="0" column="0">
     <widget class="QLabel" name="label">
      <property name="text">
       <string>开始寻找富婆：</string>
      </property>
     </widget>
    </item>
    <item row="2" column="0">
     <widget class="QPushButton" name="pushButton">
      <property name="text">
       <string>开始</string>
      </property>
     </widget>
    </item>
    <item row="2" column="1">
     <widget class="QPushButton" name="pushButton_2">
      <property name="text">
       <string>停止</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

 

将ui文件转换成py类后如下：

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

# Form implementation generated from reading ui file 'main.ui'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# 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_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.formLayoutWidget = QtWidgets.QWidget(Form)
        self.formLayoutWidget.setGeometry(QtCore.QRect(90, 40, 211, 141))
        self.formLayoutWidget.setObjectName("formLayoutWidget")
        self.formLayout = QtWidgets.QFormLayout(self.formLayoutWidget)
        self.formLayout.setContentsMargins(0, 0, 0, 0)
        self.formLayout.setObjectName("formLayout")
        self.lineEdit = QtWidgets.QLineEdit(self.formLayoutWidget)
        self.lineEdit.setObjectName("lineEdit")
        self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.lineEdit)
        self.label = QtWidgets.QLabel(self.formLayoutWidget)
        self.label.setObjectName("label")
        self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label)
        self.pushButton = QtWidgets.QPushButton(self.formLayoutWidget)
        self.pushButton.setObjectName("pushButton")
        self.formLayout.setWidget(2, QtWidgets.QFormLayout.LabelRole, self.pushButton)
        self.pushButton_2 = QtWidgets.QPushButton(self.formLayoutWidget)
        self.pushButton_2.setObjectName("pushButton_2")
        self.formLayout.setWidget(2, QtWidgets.QFormLayout.FieldRole, self.pushButton_2)

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "全国富婆通讯录"))
        self.label.setText(_translate("Form", "开始寻找富婆："))
        self.pushButton.setText(_translate("Form", "开始"))
        self.pushButton_2.setText(_translate("Form", "停止"))

 

运行代码如下：

import random
import time
from threading import Thread

import null as null
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QApplication, QWidget

from ui.main import Ui_Form


class MainWindow(QWidget):
    signal1 = pyqtSignal(str, str)  # 定义带类型参数信号

    stopSign = 0

    thread = null

    woman = ["桂花", "翠花", "桂英", "桂凤", "翠芬", "桂兰", "红梅", "腊梅", "月红", "月英", "玉兰", "玉芝", "小兰", "蓉芳", "兰芳", "彩凤", "嫦娟", "招娣",
             "引娣"]

    def __init__(self):
        super().__init__()
        self.ui = Ui_Form()
        self.ui.setupUi(self)

        str = "string"

        self.ui.pushButton.clicked.connect(lambda: self.startThread(str))
        self.ui.pushButton_2.clicked.connect(self.stopThread)

        self.signal1.connect(self.updateview)

    def startThread(self, str):
        self.stopSign = 0  # 关闭线程关闭标识
        print(str)
        text = self.ui.lineEdit.text()
        if (self.thread != null and self.thread.isAlive()):
            return  # 不重复开启线程

        self.thread = Thread(target=self.threadSend,
                             args=(text,)  # 元组
                             )
        self.thread.start()

    def stopThread(self):  # 停止子线程
        # self.thread.join() #这个方法的意思是阻塞其他线程包括主线程，专注于运行子线程的任务，直至子线程完成
        self.stopSign = 1  # 打开线程关闭标识
        self.thread.join()

    def threadSend(self, text):  # 开启子线程，不阻塞主线程
        while (self.stopSign == 0):
            time.sleep(0.1)

            item = self.woman[random.randint(0, 18)]

            self.signal1.emit(item, text)  # 子线程不直接更新页面，发送信号让主线程去更新

    def updateview(self, item, text):  # 更新页面执行
        self.ui.lineEdit.setText(text + "+" + item)


app = QApplication([])
stats = MainWindow()
stats.show()
app.exec_()

 

运行效果如下：