第一部分：UI界面设计

界面效果图如下：

ui文件(可拉动控件自行创建一个button和text）

<?xml version="1.0" encoding="UTF-8"?><ui version="4.0"> <class>Dialog</class> <widget class="QDialog" name="Dialog"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>585</width> <height>394</height> </rect> </property> <property name="windowTitle"> <string>Dialog</string> </property> <widget class="QPushButton" name="pushButton"> <property name="geometry"> <rect> <x>230</x> <y>320</y> <width>75</width> <height>23</height> </rect> </property> <property name="text"> <string>timer_click</string> </property> </widget> <widget class="QTextEdit" name="textEdit"> <property name="geometry"> <rect> <x>70</x> <y>30</y> <width>441</width> <height>231</height> </rect> </property> </widget> </widget> <resources/> <connections> <connection> <sender>pushButton</sender> <signal>clicked()</signal> <receiver>Dialog</receiver> <slot>timer_click()</slot> <hints> <hint type="sourcelabel"> <x>217</x> <y>229</y> </hint> <hint type="destinationlabel"> <x>250</x> <y>241</y> </hint> </hints> </connection> </connections> <slots> <slot>timer_click()</slot> </slots></ui>

生成的py文件

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'TEST_QT_FROM.ui'## Created by: PyQt5 UI code generator 5.11.3## WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Dialog(object): def setupUi(self, Dialog): Dialog.setObjectName("Dialog") Dialog.resize(585, 394) self.pushButton = QtWidgets.QPushButton(Dialog) self.pushButton.setGeometry(QtCore.QRect(230, 320, 75, 23)) self.pushButton.setObjectName("pushButton") self.textEdit = QtWidgets.QTextEdit(Dialog) self.textEdit.setGeometry(QtCore.QRect(70, 30, 441, 231)) self.textEdit.setObjectName("textEdit") self.retranslateUi(Dialog) self.pushButton.clicked.connect(Dialog.timer_click) QtCore.QMetaObject.connectSlotsByName(Dialog) def retranslateUi(self, Dialog): _translate = QtCore.QCoreApplication.translate Dialog.setWindowTitle(_translate("Dialog", "Dialog")) self.pushButton.setText(_translate("Dialog", "timer_click"))

第二部分：主要逻辑代码

from PyQt5 import QtWidgets, QtCorefrom testqt.TEST_QT_FROM import Ui_Dialogimport sysfrom PyQt5.QtCore import *import time# 继承QThreadclass Runthread(QtCore.QThread): # python3,pyqt5与之前的版本有些不一样 # 通过类成员对象定义信号对象 _signal = pyqtSignal(str) def __init__(self): super(Runthread, self).__init__() def __del__(self): self.wait() def run(self): print("run 666") self._signal.emit("run 666"); # 信号发送class TestQtFromC(QtWidgets.QWidget, Ui_Dialog): text ="" def __init__(self): super(TestQtFromC, self).__init__() self.setupUi(self) #click def timer_click(self): self.thread = Runthread() # 创建线程 self.thread._signal.connect(self.callbacklog) # 连接信号 self.thread.start() # 开始线程 # callback def callbacklog(self, msg): self.text =self.text+time.strftime("%Y-%m-%d %H:%M:%S ", time.localtime())+msg+ "\n" print(self.text) # 回调数据输出到文本框 self.textEdit.setText(self.text);if __name__ == "__main__": app = QtWidgets.QApplication(sys.argv) mTestQtFromC = TestQtFromC() mTestQtFromC.show() sys.exit(app.exec_())

第三部分：运行效果图

点击click就可刷新界面了

以上这篇python之线程通过信号pyqtSignal刷新ui的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。