pyqt5 Qlabel标签添加点击事件

1.定义信号

class MyLabel(QLabel):
    clicked = pyqtSignal(str)

    def __init__(self,parent=None):
        super(LineLabel, self).__init__(parent)

        self.txt= ""

    # 鼠标点击事件
    def mousePressEvent(self, event):
        self.clicked.emit(self.txt)

2.连接信号

 txt="test"
 self.line_lab=MyLabel()
 self.line_lab.clicked.connect(lambda: self.set_line_lab(txt))

def set_line_lab(self,txt):
    print(txt)