PyQt5 – 进度条的背景颜色

当我们创建一个进度条时，虽然进度条的颜色是绿色的，但默认情况下并没有设置背景色。在这篇文章中，我们将看到如何为进度条设置背景色。下面是普通进度条和有背景颜色的进度条的对比。

PyQt5 - 进度条的背景颜色

为了做到这一点，我们必须使用setStyleSheet方法改变CSS样式表，下面是样式表。

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

以下是实施情况。

# 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())