2018-02-27:创建一个带状态栏提示的主窗口

目标：
通过Python调用PyQt5的相关库函数，创建带状态栏的主窗口

---

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Tue Feb 27 13:24:08 2018

@author: liuqiang
"""

from PyQt5.QtWidgets import QApplication, QMainWindow
 
class App(QMainWindow):
 
    def __init__(self):
        super(App, self).__init__()
        self.title = 'PyQt5 status bar example'
        self.left = 10
        self.top = 10
        self.width = 640
        self.height = 480
        self.initUI()
 
    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
        self.statusBar().showMessage('Message in statusbar.')
        self.show()
 
if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

---

运行结果为：

Screenshot from 2018-02-27 13-29-56.png