PyQT5样式设置

from PyQt5.QtWidgets import *
import sys


class BasicQCSS(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("QSS样式")
        btn1 = QPushButton(self)
        btn1.setText("按钮1")
        btn1.setProperty("name", 'btn1')

        btn2 = QPushButton(self)
        btn2.setText("按钮2")
        btn2.setProperty("name", 'btn2')

        btn3 = QPushButton(self)
        btn3.setText("按钮3")
        btn3.setProperty("name", 'btn3')

        vbox = QVBoxLayout()
        vbox.addWidget(btn1)
        vbox.addWidget(btn2)
        vbox.addWidget(btn3)

        self.setLayout(vbox)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    main = BasicQCSS()
    # 选择器
    qssStyle = '''
    QPushButton[name='btn2'] {
    background-color:red;
    color:blue;
    height:120;
    font-size:60px;
    }
    QPushButton[name='btn3'] {
    background-color:yellow;
    color:red;
    height:60;
    font-size:30px;
    }
    '''
    main.setStyleSheet(qssStyle)
    main.show()
    sys.exit(app.exec_())