一.简易登录界面的实现

from tkinter import *
from tkinter import messagebox

class Application(Frame):

    def __init__(self, master=None):
        super().__init__(master)        # super()代表的是父类的定义，而不是父类对象
        self.master = master
        self.pack()
        self.createWidget()


    def createWidget(self):
        """创建登录界面的组件"""
        self.label01 = Label(self,text="用户名")
        self.label01.pack()

        # StringVar变量绑定到指定的组件。
        # StringVar变量的值发生变化，组件内容也变化；
        # 组件内容发生变化，StringVar变量的值也发生变化。
        v1 = StringVar()
        self.entry01 = Entry(self,textvariable=v1)
        self.entry01.pack()
        v1.set("admin")
        print(v1.get());print(self.entry01.get())


        # 创建密码框
        self.label02 = Label(self,text="密码")
        self.label02.pack()

        v2 = StringVar()
        self.entry02 = Entry(self,textvariable=v2, show="*")
        self.entry02.pack()

        Button(self,text="登陆",command=self.login).pack()

    def login(self):
        username = self.entry01.get()
        pwd = self.entry02.get()

        print("去数据库比对用户名和密码！")
        print("用户名："+username)
        print("密码："+pwd)

        if username=="gaoqi" and pwd=="123456":
            messagebox.showinfo("学习系统","登录成功！欢迎开始学习！")
        else:
            messagebox.showinfo("学习系统","登录失败！用户名或密码错误！")


if __name__ == '__main__':
    root = Tk()
    root.geometry("400x130+200+300")
    app = Application(master=root)
    root.mainloop()

 最终效果如下

二.计算器软件界面的设计

这个案例中主要是利用button按钮进行布局

from tkinter import *

class Application(Frame):

    def __init__(self, master=None):
        super().__init__(master)       # super()代表的是父类的定义，而不是父类对象
        self.master = master
        self.pack()
        self.createWidget()

    def createWidget(self):
        """通过grid布局实现计算器的界面"""
        btnText = (("MC","M+","M-","MR"),
                   ("C","±","/","✖️"),
                   (7,8,9,"-"),
                   (4,5,6,"+"),
                   (1,2,3,"="),
                   (0,"."))

        Entry(self).grid(row=0,column=0,columnspan=4,pady=10)

        for rindex,r in enumerate(btnText):
            for cindex,c in enumerate(r):
                if c == "=":
                    Button(self,text=c,width=2)\
                    .grid(row=rindex+1,column=cindex,rowspan=2,sticky=NSEW)
                elif c == 0:
                    Button(self,text=c,width=2)\
                    .grid(row=rindex+1,column=cindex,columnspan=2,sticky=NSEW)

                elif c == ".":
                    Button(self,text=c,width=2)\
                    .grid(row=rindex+1,column=cindex+1,sticky=NSEW)
                else:
                    Button(self,text=c,width=2)\
                    .grid(row=rindex+1,column=cindex,sticky=NSEW)


if __name__ == '__main__':
    root = Tk()
    root.geometry("200x240+200+300")
    app = Application(master=root)
    root.mainloop()

最终效果图如下

三.模拟钢琴游戏的界面设计

因为这个案例比较简单，就没有采用面向对象的写法

from tkinter import *

root = Tk();root.geometry("700x220")

# Frame是一个矩形区域，就是用来放置其他子组件
f1 = Frame(root)
f1.pack()
f2 = Frame(root);f2.pack()

btnText = ("流行风","中国风","日本风","重金属","轻音乐")

for txt in btnText:
    Button(f1,text=txt).pack(side="left",padx="10")

for i in range(1,13):
    Label(f2,width=5,height=10,borderwidth=1,relief="solid",
          bg="black" if i%2==0 else "white").pack(side="left",padx=2)

root.mainloop()

最终效果图

四.简易记事本的界面设计及功能开发

from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *


class Application(Frame):

    def __init__(self, master=None):
        super().__init__(master)        # super()代表的是父类的定义，而不是父类对象
        self.master = master
        self.textpad = None             # textpad表示Text文本框对象
        self.pack()
        self.createWidget()

    def createWidget(self):
        # 创建主菜单栏
        menubar = Menu(root)

        # 创建子菜单
        menuFile = Menu(menubar)
        menuEdit = Menu(menubar)
        menuHelp = Menu(menubar)

        # 将子菜单加入到主菜单栏
        menubar.add_cascade(label="文件(F)", menu=menuFile)
        menubar.add_cascade(label="编辑(E)", menu=menuEdit)
        menubar.add_cascade(label="帮助(H)", menu=menuHelp)

        # 添加菜单项
        menuFile.add_command(label="新建", accelerator="ctrl+n", command=self.newfile)
        menuFile.add_command(label="打开", accelerator="ctrl+o", command=self.openfile)
        menuFile.add_command(label="保存", accelerator="ctrl+s",command=self.savefile)
        menuFile.add_separator()  # 添加分割线
        menuFile.add_command(label="退出", accelerator="ctrl+q",command=self.exit)

        # 将主菜单栏加到根窗口
        root["menu"] = menubar

        # 增加快捷键的处理
        root.bind("<Control-n>",lambda event:self.newfile())
        root.bind("<Control-o>",lambda event:self.openfile())
        root.bind("<Control-s>",lambda event:self.savefile())
        root.bind("<Control-q>",lambda event:self.exit())

        #文本编辑区
        self.textpad = Text(root, width=50, height=30)
        self.textpad.pack()

        # 创建上下菜单
        self.contextMenu = Menu(root)
        self.contextMenu.add_command(label="背景颜色", command=self.openAskColor)

        #为右键绑定事件
        root.bind("<Button-3>",self.createContextMenu)

    def newfile(self):
        self.textpad.delete("1.0", "end")  # 把text控件中所有的内容清空
        self.filename= asksaveasfilename(title="另存为",initialfile="未命名.txt",
                          filetypes=[("文本文档","*.txt")],
                          defaultextension=".txt")
        self.savefile()

    def openfile(self):
        self.textpad.delete("1.0","end")        # 把text控件中所有的内容清空
        with askopenfile(title="打开文本文件") as f:
            self.textpad.insert(INSERT,f.read())
            self.filename = f.name

    def savefile(self):
        with open(self.filename,"w") as f:
            c = self.textpad.get(1.0,END)
            f.write(c)

    def exit(self):
        root.quit()

    def openAskColor(self):
        s1 = askcolor(color="red",title="选择背景色")
        self.textpad.config(bg=s1[1])
    def createContextMenu(self,event):
        # 菜单在鼠标右键单击的坐标处显示
        self.contextMenu.post(event.x_root, event.y_root)


if __name__ == '__main__':
    root = Tk()
    root.geometry("450x300+200+300")
    root.title("我的简易记事本")
    app = Application(master=root)
    root.mainloop()

 最终效果如下

 五.自制画图软件的界面开发及功能设计

from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *

#窗口的宽度和高度
win_width=900
win_height=450

class Application(Frame):

    def __init__(self, master=None,bgcolor="#000000"):
        super().__init__(master)        # super()代表的是父类的定义，而不是父类对象
        self.master = master
        self.bgcolor = bgcolor
        self.fgcolor = "#ff0000"
        self.x = 0
        self.y = 0  # 鼠标坐标
        self.startDrawFlag = False  # 是否开始画画
        self.lastDraw = 0  # 最后绘制图形的id

        self.drawpad = None         #绘图区canvas对象

        self.pack()
        self.createWidget()

    def createWidget(self):
        #绘图区
        self.drawpad = Canvas(root, width=win_width, height=win_height*0.8, bg=self.bgcolor)
        self.drawpad.pack()

        # 创建操作按钮
        btn_start = Button(root, text="开始", name="start")
        btn_start.pack(side="left", padx="10")
        btn_pen = Button(root, text="画笔", name="pen")
        btn_pen.pack(side="left", padx="10")
        btn_rect = Button(root, text="画矩形", name="rect")
        btn_rect.pack(side="left", padx="10")
        btn_clear = Button(root, text="清屏", name="clear")
        btn_clear.pack(side="left", padx="10")
        btn_eraser = Button(root, text="橡皮擦", name="eraser")
        btn_eraser.pack(side="left", padx="10")
        btn_line = Button(root, text="直线", name="line")
        btn_line.pack(side="left", padx="10")
        btn_lineArrow = Button(root, text="直线(箭头)", name="lineArrow")
        btn_lineArrow.pack(side="left", padx="10")
        btn_color = Button(root, text="颜色", name="chooseColor")
        btn_color.pack(side="left", padx="10")
        # 给所有按钮处理事件
        btn_pen.bind_class("Button", "<1>", self.myEventManager)

        #为右键绑定事件
        root.bind("<Button-3>",self.createContextMenu)

        #程序一进来默认就处理鼠标拖动事件，默认使用画笔画画
        self.drawpad.bind("<B1-Motion>", self.myDrawPen)
        self.drawpad.bind("<ButtonRelease-1>", self.stopDraw)

        #增加快捷键处理
        root.bind("<KeyPress-r>", self.kuaijiejian)
        root.bind("<KeyPress-g>", self.kuaijiejian)
        root.bind("<KeyPress-y>", self.kuaijiejian)


    def myEventManager(self,event):
        name = event.widget.winfo_name()
        self.drawpad.bind("<ButtonRelease-1>", self.stopDraw)

        if name == "rect":
            self.drawpad.bind("<B1-Motion>", self.myDrawRect)
        elif name == "clear":
            self.drawpad.delete("all")
        elif name == "eraser":
            self.drawpad.bind("<B1-Motion>", self.myEraser)
        elif name == "line":
            self.drawpad.bind("<B1-Motion>", self.myLine)
        elif name == "lineArrow":
            self.drawpad.bind("<B1-Motion>", self.myLineArrow)
        elif name == "chooseColor":
            c = askcolor(color=self.fgcolor, title="选择画笔颜色")
            #print(c)  # ((225.87890625, 3.01171875, 30.1171875), '#e1031e')
            self.fgcolor = c[1]
        else:  # 画笔
            self.drawpad.bind("<B1-Motion>", self.myDrawPen)

    def createContextMenu(self,event):
        # 菜单在鼠标右键单击的坐标处显示
        self.contextMenu.post(event.x_root, event.y_root)

    def myDrawPen(self,event):

        #print("鼠标位置(相对于父容器)：({0},{1})".format(event.x, event.y))
        if not self.startDrawFlag:
            self.startDrawFlag=True
            self.x = event.x; self.y=event.y

        self.lastDraw = self.drawpad.create_line(self.x,self.y,event.x,event.y,fill=self.fgcolor)
        self.x = event.x
        self.y = event.y

    def stopDraw(self,event):
        self.startDrawFlag = False
        print("不能画")
        self.lastDraw = 0

    def myDrawRect(self,event):

        self.drawpad.delete(self.lastDraw)

        if not self.startDrawFlag:
            self.startDrawFlag=True
            self.x = event.x; self.y=event.y

        self.lastDraw = self.drawpad.create_rectangle(self.x,self.y,event.x,event.y,outline=self.fgcolor)

    def myEraser(self,event):
        if not self.startDrawFlag:
            self.startDrawFlag = True

        self.drawpad.create_rectangle(event.x - 4, event.y - 4, event.x + 4, event.y + 4,
                                      outline=self.bgcolor,fill=self.bgcolor)

    def myLine(self,event):
        self.drawpad.delete(self.lastDraw)

        if not self.startDrawFlag:
            self.startDrawFlag=True
            self.x = event.x; self.y=event.y

        self.lastDraw = self.drawpad.create_line(self.x, self.y, event.x, event.y,
                                                 fill=self.fgcolor)

    def myLineArrow(self,event):
        self.drawpad.delete(self.lastDraw)

        if not self.startDrawFlag:
            self.startDrawFlag=True
            self.x = event.x
            self.y=event.y

        self.lastDraw = self.drawpad.create_line(self.x, self.y, event.x, event.y,
                                                 fill=self.fgcolor,arrow=LAST)

    #处理快捷键
    def kuaijiejian(self,event):
        if event.char == "r":
            self.fgcolor = "#ff0000"
        elif event.char =="g":
            self.fgcolor = "#00ff00"
        elif event.char == "y":
            self.fgcolor = "#ffff00"


if __name__ == '__main__':
    root = Tk()
    root.geometry(str(win_width)+"x"+str(win_height)+"+400+400")
    root.title("我的画图软件")
    app = Application(master=root)
    root.mainloop()

最终效果图如下

 好啦，以上五个案列全部奉上，喜欢的记得点点赞啦