我是多线程新手。我使用的视频文件工作正常,开头的进度条显示进度条中的百分比。当我想连续更改进度条值时,例如当前的cpu使用值,以下代码在运行代码时不断崩溃。为什么代码不起作用?
我认为问题是发射和连接。如果是这样我该怎么办?我该如何纠正这个?在此先感谢您的帮助。
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QObject, pyqtSignal
import sysinfo
from multi import Ui_Form
class main(QtWidgets.QWidget ,Ui_Form):
cpu_value = pyqtSignal()
def __init__(self, parent = None):
super(main,self).__init__(parent)
self.setupUi(self)
self.threadclass = ThreadClass()
self.threadclass.start()
self.cpu_value.connect(self.updateProgressBar)
def updateProgressBar(self):
val = sysinfo.getCPU()
self.progressBar.setValue(val)
class ThreadClass(QtCore.QThread):
def __init__(self, parent = None):
super(ThreadClass,self).__init__(parent)
def run(self):
while 1:
val = sysinfo.getCPU()
self.cpu_value.emit(val)
if __name__ == '__main__':
a = QtWidgets.QApplication(sys.argv)
app = main()
app.show()
a.exec_()
答案 0 :(得分:0)
env:python3.5 + pyqt5.9
我使用计时器来更新CPU信息:
#!/usr/bin/python3
# 2017.12.10 13:20:11 CST
# 显示 CPU
import sys
from PyQt5 import QtCore, QtWidgets
import psutil
class CPU(QtWidgets.QProgressBar):
def __init__(self, parent=None):
super().__init__(parent)
self.setWindowTitle("CPU Info")
self.timer = QtCore.QTimer(self)
self.timer.timeout.connect(lambda : self.setValue(psutil.cpu_percent()))
self.timer.start(1000)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
win = CPU()
win.show()
app.exec_()