详解pyqt5 动画在QThread线程中无法运行问题
作者:蝉时雨 时间:2021-07-22 21:00:43
自己做了一个tcp工具,在学习动画的时候踩了坑,需求是根据上线变绿色,离线变灰色,如果连接断开了,则变为灰色
问题现象:
可以看到点击“连接”,“离线”的时候动画是正常的,但是当tcp超时断开后,虽然离线按钮变为连接了,却没有执行离线动画
关键源代码如下
class BSJTcpThread(QtCore.QThread):
recv_signal = QtCore.pyqtSignal(str)
send_signal = QtCore.pyqtSignal(str)
def __init__(self, socketcp, onBtn, heartcheck, senBtn, scene):
super().__init__()
self.s = socketcp
self.yqtool = Bianlifunction()
self.onBtn = onBtn
self.heartcheck = heartcheck
self.sendBtn = senBtn
self.scene1 = scene
def run(self):
"""线程"""
global stopsingle
stopsingle = 0
while 1:
btcpreceive = self.s.recv(1024)
tcpreceive1 = str(binascii.b2a_hex(btcpreceive), encoding="utf-8")
tcpreceive = ""
i = 0
while i < len(tcpreceive1) - 1: # 十六进制数据处理,两个字节隔开
if i == len(tcpreceive1) - 2:
tcpreceive += tcpreceive1[i:i + 2]
i += 2
else:
tcpreceive += tcpreceive1[i:i + 2] + " "
i += 2
if tcpreceive == "":
stopsingle = 1
self.s.shutdown(2)
self.s.close()
self.onBtn.setText("连接")
self.scene1.offlineCol.start() # 启动离线动画
self.heartcheck.setChecked(False)
self.heartcheck.setVisible(False)
self.sendBtn.setDisabled(True)
else:
self.recv_signal.emit(tcpreceive)
if stopsingle == 1:
break
然后再启动线程
self.tcpth = BSJTcpThread(self.s, self.onBtn, self.heartcheck, self.sendBtn, self.scene)
self.tcpth.recv_signal.connect(self.fillrecvmsg)
self.tcpth.send_signal.connect(self.fillsendmsg)
self.tcpth.start()
问题点:
经过谷爹搜索,终于找到了问题原因详见https://stackoverflow.com/questions/44328750/pyqt-qgraphicscene-move-item-in-background-thread
大致原因就是QGraphics Scene 不是一个安全的线程对象,我们不能直接在线程中去改变主程序的状态,我们必须通过信号的方式去更新QGraphics
解决方法:
首先,我们编辑一个信号方法
def threadAnimate(self, message):
if message == "1":
self.scene.offlineCol.start()
然后添加相关信号槽
self.tcpth = BSJTcpThread(self.s, self.onBtn, self.heartcheck, self.sendBtn)
self.tcpth.recv_signal.connect(self.fillrecvmsg)
self.tcpth.send_signal.connect(self.fillsendmsg)
self.tcpth.animate_signal.connect(self.threadAnimate) # 添加一个动画信号
self.tcpth.start()
在线程中发出离线动画的信号
class BSJTcpThread(QtCore.QThread):
recv_signal = QtCore.pyqtSignal(str)
send_signal = QtCore.pyqtSignal(str)
animate_signal = QtCore.pyqtSignal(str)
def __init__(self, socketcp, onBtn, heartcheck, senBtn):
super().__init__()
self.s = socketcp
self.yqtool = Bianlifunction()
self.onBtn = onBtn
self.heartcheck = heartcheck
self.sendBtn = senBtn
def run(self):
"""线程"""
global stopsingle
stopsingle = 0
while 1:
btcpreceive = self.s.recv(1024)
tcpreceive1 = str(binascii.b2a_hex(btcpreceive), encoding="utf-8")
tcpreceive = ""
i = 0
while i < len(tcpreceive1) - 1: # 十六进制数据处理,两个字节隔开
if i == len(tcpreceive1) - 2:
tcpreceive += tcpreceive1[i:i + 2]
i += 2
else:
tcpreceive += tcpreceive1[i:i + 2] + " "
i += 2
if tcpreceive == "":
stopsingle = 1
self.s.shutdown(2)
self.s.close()
self.onBtn.setText("连接")
self.animate_signal.emit("1")
self.heartcheck.setChecked(False)
self.heartcheck.setVisible(False)
self.sendBtn.setDisabled(True)
else:
self.recv_signal.emit(tcpreceive)
if stopsingle == 1:
break
然后就可以了,这个和QThread多线程收发消息原理一样
来源:http://www.cnblogs.com/semishigure/p/8986088.html
标签:pyqt5,QThread线程
0
投稿
猜你喜欢
pytorch安装及环境配置的完整过程
2023-06-19 23:53:20
提高MySQL查询效率的三个技巧
2009-02-11 13:19:00
关于Python网络爬虫框架scrapy
2023-03-17 17:02:50
Python 异步之生成器示例详解
2023-01-12 04:34:26
Dreamweaver打造多彩文字链接
2007-11-11 18:59:00
python并发2之使用asyncio处理并发
2022-01-11 23:41:28
Python pandas如何向excel添加数据
2021-07-14 17:37:41
asp中常用的字符串安全处理函数集合(过滤特殊字符等)
2011-02-20 10:40:00
MySQL字段类型详解
2009-01-05 09:23:00
Python通过RabbitMQ服务器实现交换机功能的实例教程
2023-08-24 01:15:19
asp网上考试设计思路是怎样的?
2010-07-14 21:09:00
javascript 版 Bad Apple 字符动画
2010-01-28 12:19:00
避免重复写代码的小函数
2008-09-21 13:41:00
CSS网页布局扩展小技巧
2010-06-03 12:13:00
手把手教你在Python里使用ChatGPT
2023-11-10 02:55:58
asp如何制作一个小巧的购物车?
2010-07-07 12:25:00
课程讲解 如何使用SQL Server校勘功能
2009-01-13 13:27:00
django+js+ajax实现刷新页面的方法
2021-04-19 05:22:20
Pandas索引排序 df.sort_index()的实现
2023-02-13 23:49:48
Jenkins配置maven项目之打包、部署、发布的全过程
2023-08-07 19:14:29