PyQt5笔记（02） -- 按钮点击事件

本节主要介绍在一个PyQt窗体内添加一个按钮，鼠标停留在按钮上会出现提示，并在点击按钮时响应一个事件

import sysfrom PyQt5.QtWidgets import QApplication, QWidget, QPushButtonfrom PyQt5.QtGui import QIconfrom PyQt5.QtCore import pyqtSlotclass App(QWidget):    def __init__(self):        super().__init__()        self.title = "PyQt5 button"        self.left = 10        self.top = 10        self.width = 320        self.height = 200        self.initUI()    def initUI(self):        self.setWindowTitle(self.title)        self.setGeometry(self.left, self.top, self.width, self.height)        """在窗体内创建button对象"""        button = QPushButton("PyQt5 Button", self)        """方法setToolTip在用户将鼠标停留在按钮上时显示的消息"""        button.setToolTip("This is an example button")        """按钮坐标x = 100, y = 70"""        button.move(100, 70)        """按钮与鼠标点击事件相关联"""        button.clicked.connect(self.on_click)        self.show()    """创建鼠标点击事件"""    @pyqtSlot()    def on_click(self):        print("PyQt5 button click")if __name__ == '__main__':    app = QApplication(sys.argv)    ex = App()    sys.exit(app.exec_())