PyQt5 - 渐变色进度条

在本文中，我们将了解如何为进度条设置渐变颜色。下面是正常颜色进度条的外观与渐变颜色进度条的外观。

为此，我们必须更改 CSS 样式表，下面是样式表的代码。

QProgressBar::chunk 
{
border : 1px solid black;
background: QLinearGradient( x1: 0, y1: 0,
                             x2: 1, y2: 0, 
                          stop: 0 #000fff, 
                          stop: 1 #ff000f );
}

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, 150, 200, 30)
  
        # set value to progress bar
        bar.setValue(30)
  
        # setting alignment to center
        bar.setAlignment(Qt.AlignCenter)
  
        # setting gradient color to progress bar
        bar.setStyleSheet("QProgressBar"
                          "{"
                          "border : 1px solid black;"
                          "background: QLinearGradient( x1: 0, y1: 0,
                                                        x2: 1, y2: 0,
                                                    stop: 0 # 00ffff,
                                                    stop: 1 # ff000f );"
                          "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：