【下载文档:  python之线程通过信号pyqtSignal刷新ui的方法.txt 】

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python之线程通过信号pyqtSignal刷新ui的方法
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）


Dialog



0
0
585
394



Dialog




230
320
75
23



timer_click





70
30
441
231







pushButton
clicked()
Dialog
timer_click()


217
229


250
241





timer_click()


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, QtWidgets
class 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, QtCore
from testqt.TEST_QT_FROM import Ui_Dialog
import sys
from PyQt5.QtCore import *
import time
# 继承QThread
class 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
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