import tkinter as tk
from tkinter import messagebox, Frame


class Application(Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.createwidget()

    def createwidget(self):
        """
        label标签控件，可显示文本和位图；Button按钮控件，在程序中显示按钮
        """
        global login_image
        login_image = tk.PhotoImage(file='image/welcome.gif')
        self.label_image = tk.Label(self, image=login_image)
        # 通过布局管理器管理
        self.label_image.pack()
        # bg背景色；fg字体颜色；font字体格式(什么体、大小);width宽（单位字符）；height高度
        self.label_info = tk.Label(self, text='tkinter学习', width=13, height=2,
                                   bg='green', fg='white', font=('黑体', 20))
        self.label_info.pack()
        self.label_text = tk.Label(self, text='登录吧\n麻溜的', borderwidth=1, relief='solid', justify='right')
        self.label_text.pack()
        # command绑定事件；text按钮名称显示
        self.button_login = tk.Button(self, text='登录', command=self.login)
        self.button_login.pack()

    def login(self):
        pass


if __name__ == '__main__':
    root = tk.Tk()
    root.geometry('450x250+400+400')
    root.title('登录页面')
    app = Application(master=root)
    root.mainloop()