PyQt5基础学习-为控件添加信号 1.self.button_clicked_signal(点击信号的按钮) 2.self.button_clicked_signal.emit(发送信号) 3.self.button_clicked_signal.connect(信号接收的槽函数)

流程: 首先点击按钮调用函数, 函数执行发送信号操作, 信号对应的槽函数实现窗口关闭的效果

WinSignal.py 

"""
为窗口类添加信号
"""
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys

class WinSignal(QWidget):
    button_clicked_signal = pyqtSignal()

    def __init__(self):
        super().__init__()
        self.setWindowTitle("为窗口类添加信号")
        self.resize(300, 100)

        btn = QPushButton("关闭窗口", self)

        btn.clicked.connect(self.btn_clicked)

        self.button_clicked_signal.connect(self.btn_close)

    def btn_clicked(self):
        self.button_clicked_signal.emit()

    def btn_close(self):
        self.close()


if __name__ == "__main__":
    app = QApplication(sys.argv)

    main = WinSignal()
    main.show()

    sys.exit(app.exec_())