pyqt5 在别的窗口弹出进度条

时间:2021-09-15 23:01:45

要求:在导入视频的同时,利用caffe训练好的模型提取视频的特征,这个过程比较费时间,因此需要进度条,不然以为程序死掉了。

在条用进度条出现的问题有:

1、进度条窗口可以弹出但是没有进度条、label、button等

2、进度条窗口内容完整,但是进度条的进度没有更新

3、进度条以上问题解决了,但在进度条窗口close()后,程序出现未响应现象。

问题一:

区分show, exec_区别

问题二:

Thread.msleep(100),模拟100个文件

 问题三:某个循环出了问题,while......


进度条对话框:

 # -*- coding: utf-8 -*-
##set progressbar

from PyQt5.QtWidgets import QApplication,QWidget,QDialog,QLabel,QLineEdit,QProgressBar,\
QPushButton,QVBoxLayout,QHBoxLayout,QGridLayout,QDialogButtonBox
from PyQt5.QtCore import Qt, QBasicTimer, QThread
import sys

class ProgressBar(QDialog):
def __init__(self, fileIndex,filenum,parent = None):
super(ProgressBar, self).__init__(parent)

self.resize(350,100)
self.setWindowTitle(self.tr("Processing progress"))

self.TipLabel = QLabel(self.tr("Processing:" + " " + str(fileIndex) + "/" + str(filenum)))
self.FeatLabel = QLabel(self.tr("Extract feature:"))

self.FeatProgressBar = QProgressBar(self)
self.FeatProgressBar.setMinimum(0)
self.FeatProgressBar.setMaximum(100) #总进程换算为100
        self.FeatProgressBar.setValue(0) #进度条初始值为0        TipLayout = QHBoxLayout()        TipLayout.addWidget(self.TipLabel)        FeatLayout = QHBoxLayout()        FeatLayout.addWidget(self.FeatLabel)        FeatLayout.addWidget(self.FeatProgressBar)        # self.startButton = QPushButton('start',self)        self.cancelButton = QPushButton('cancel', self)        # self.cancelButton.setFocusPolicy(Qt.NoFocus)        buttonlayout = QHBoxLayout()        buttonlayout.addStretch(1)        buttonlayout.addWidget(self.cancelButton)        # buttonlayout.addStretch(1)        # buttonlayout.addWidget(self.startButton)        layout = QVBoxLayout()        # layout = QGridLayout()        layout.addLayout(FeatLayout)        layout.addLayout(TipLayout)        layout.addLayout(buttonlayout)        self.setLayout(layout)        self.show()        # self.startButton.clicked.connect(self.setValue)        self.cancelButton.clicked.connect(self.onCancel)        # self.startButton.clicked.connect(self.onStart)        # self.timer = QBasicTimer()        # self.step = 0    def setValue(self,value):        self.FeatProgressBar.setValue(value)     def onCancel(self,event):        self.close()def main():    app = QApplication(sys.argv)    fileIndex = '3'   #当前正在处理第几个文件    filenum = '10'    #文件总数,在label中显示    progress = ProgressBar(fileIndex,filenum,0)    progress.show()    app.exec_()if __name__ == '__main__':    main()

在程序中弹出对对话框:

self.ProgressBar = ProgressDialog.ProgressBar(self.FileIndex,self.VideoNum)
for i in range(n*step,(n+1)*step):        # time.sleep(0.05)        self.ProgressBar.setValue(i+1) #更新进度条的值        QThread.msleep(int(self.ratio*100)) #模拟文件传送,进度条可以一点点增加,而不是一下增加很多,也可以不需要        QApplication.processEvents()  #实时显示
 
 
self.ProgressBar.close() #记得关闭进度条