PyQt5 - 进度条的背景颜色

当我们创建一个进度条时，默认情况下没有设置背景颜色，尽管进度条颜色是绿色的。在本文中，我们将了解如何为进度条设置背景颜色。下面是普通进度条与具有背景颜色的进度条的表示。

为此，我们必须使用setStyleSheet方法更改 CSS 样式表，下面是样式表。

QProgressBar
{
background-color :lightblue;
border : 1px;
}

下面是实现。

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
        # creating progress bar
        bar = QProgressBar(self)
  
        # setting geometry to progress bar
        bar.setGeometry(200, 100, 200, 30)
  
        # setting the value
        bar.setValue(30)
  
        # setting alignment to center
        bar.setAlignment(Qt.AlignCenter)
  
        # setting background color
        bar.setStyleSheet("QProgressBar"
                          "{"
                          "background-color : lightblue;"
                          "border : 1px"
                          "}")
  
  
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：