class PussButton:        #    # 生成具有三态背景图片的按钮    #    def init(self, *imgPath):            from PyQt5.QtWidgets import  QPushButton            from PyQt5.QtGui import  QPixmap            length = len(imgPath)                                    if length==3:                nomalPath = imgPath[0]                hoverPath = imgPath[1]                pressedPath = imgPath[2]            else:                pressedPath=hoverPath=nomalPath = imgPath[0]                        pixmap_mask=QPixmap('./img/1.png')            but = QPushButton('')                        print('pressedPath', pressedPath,imgPath )                        #调整按钮的大小,使其和背景的大小一致            but.setFixedSize( pixmap_mask.width(), pixmap_mask.height() )                        # 图片的三种状态            but.setStyleSheet("QPushButton{border-image:url("+nomalPath+");}"                              "QPushButton:hover{border-image:url("+hoverPath+");}"                              "QPushButton:pressed{border-image:url("+pressedPath+");}")            #            # 设置遮罩,如果不设置遮罩，PNG图片的空白部分也可以点击的            #                 but.setMask(pixmap_mask.createHeuristicMask())                            return but        def init2(self):                    from PyQt5.QtWidgets import  QPushButton            from PyQt5.QtGui import  QPixmap, QIcon            from PyQt5.QtCore import QSize            pixmap_mask=QPixmap('./img/1.png')            but = QPushButton('')            but.setFixedSize( pixmap_mask.width(), pixmap_mask.height() );              but.setMask(pixmap_mask.createHeuristicMask());              icon = QIcon(pixmap_mask)                        but.setIcon(icon);              but.setIconSize(QSize(pixmap_mask.width(),pixmap_mask.height()));              but.setToolTip("hello")            but.clicked.connect(self.print_click)                        return but                def print_click(self):            print('print_click')                                if __name__ == '__main__':      import sys    from PyQt5.QtWidgets import QApplication    from PyQt5.QtWidgets import (QWidget,  QLabel, QVBoxLayout)    from PyQt5.QtCore   import Qt    from PyQt5.QtGui import  QPixmap, QImage                app = QApplication(sys.argv)          #####################################################       main= QWidget()            layout_main = QVBoxLayout()    layout_main.setAlignment( Qt.AlignLeft )    main.setLayout(layout_main)                                                                   label_top = QLabel()    pixmap_top=QPixmap('./img/3.png')    label_top.setPixmap(pixmap_top)    layout_main.addWidget(label_top)        tool = PussButton()    paths = ['./img/1.png','./img/2.png','./img/3.png' ]    but_3 = tool.init(*paths)    layout_main.addWidget(but_3)        but_4 =tool.init2()    layout_main.addWidget(but_4)            image = QImage("./img/2.png");    pixmap=  QPixmap()    pixmap.convertFromImage(image)    label= QLabel()    label.setPixmap(pixmap)        main.show()#####################################################       sys.exit(app.exec_())