我正面临线程问题。我正在使用进度条显示当前的CPU使用情况,它似乎运行良好,但是整个窗口的性能却很糟糕。甚至没有落后行为也无法单击该按钮。有没有简单的解决方案可以解决?
这是我的主要代码
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QThread, pyqtSignal
import progressBarUI
import sys
import sysnfo
class MainWindow(QtWidgets.QMainWindow, progressBarUI.Ui_MainWindow):
def __init__(self, parent = None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.threadclass = ThreadClass()
self.threadclass.start()
self.threadclass.signal.connect(self.updateProgressBar)
def updateProgressBar(self):
current_percentage = sysnfo.getCpuPercentage()
self.progressBar.setValue(current_percentage)
class ThreadClass(QThread):
signal = pyqtSignal(int)
def __init__(self, parent=None):
super(ThreadClass, self).__init__(parent)
def run(self):
while True:
current_percentage = sysnfo.getCpuPercentage()
self.signal.emit(current_percentage)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
mainAppWin = MainWindow()
mainAppWin.show()
app.exec_()
这里是sysnfo模块:
import psutil as ps
def getCpuPercentage():
return ps.cpu_percent(interval=1)
和UI文件(转换为.py文件):
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(787, 203)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
self.progressBar.setGeometry(QtCore.QRect(370, 20, 381, 111))
self.progressBar.setProperty("value", 0)
self.progressBar.setObjectName("progressBar")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(20, 50, 151, 41))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 787, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Click me"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
[当您使用“ interval”参数时,表示它在该时间段内测量信息并计算平均值,从而导致该函数的执行花费“ interval”秒,而正确的做法是在另一个线程中执行它,但是您也会在阻止它的主线程中的updateProgressBar方法中执行该错误,而是使用向您发送信号的信息:
@QtCore.pyqtSlot(int)
def updateProgressBar(self, percentage):
self.progressBar.setValue(percentage)