具體程式碼如下

import sys
from PyQt5.QtWidgets import QWidget, QPushButton, QApplication
from PyQt5.QtGui import QPalette, QBrush, QPixmap

 
 
class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI() #介面繪製交給InitUi方法
        
        
    def initUI(self):
        
        self.button = QPushButton('按鈕', self)
        
        self.button.setStyleSheet("QPushButton{color:black}"
                                  "QPushButton:hover{color:red}"
                                  "QPushButton{background-color:rgb(78,255,255)}"
                                  "QPushButton{border:2px}"
                                  "QPushButton{border-radius:10px}"
                                  "QPushButton{padding:2px 4px}")
        
        self.button.setMinimumHeight(30)
        self.button.move(100, 100)
        
        #設定視窗的位置和大小
        self.setGeometry(300, 300, 500, 500)  
        #設定視窗的標題
        self.setWindowTitle('Example')
        
        #設定背景圖片
        palette1 = QPalette()
        palette1.setBrush(self.backgroundRole(), QBrush(QPixmap('background.jpg')))
        self.setPalette(palette1)
        
        
        #顯示視窗
        self.show()
        
        
if __name__ == '__main__':
    #建立應用程式和物件
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_()) 
 

參考部落格

https://blog.csdn.net/qq_32973061/article/details/81102171