如何在 Python tkinter 中使用 Stringvar 收集字符串？

Question

我正在尝试获取输入的信息，例如成绩和备注。对于年级，我使用的是 OptionMenu 并且打印完美，但我的笔记 (biljeska) 不会打印任何内容

代码示例：

import tkinter as tk
import datetime
dt = datetime.datetime.today()
class OdabirRazreda():
    def __init__(self):
        self.window2 = tk.Tk()
        g=tk.Button(self.window2,command=self.unos)
        g.pack()

        self.ocjena = tk.StringVar()
        self.razred=tk.StringVar()
        self.biljeska=tk.StringVar()
        self.ucenik=tk.StringVar()
        self.window2.mainloop()

    def unos(self):
        self.window2.withdraw()
        self.window4 = tk.Tk()

        lbl_ocjena = tk.Label(self.window4, text="Ocjena")
        self.lbl_biljeska = tk.Label(self.window4, text="Bilješka:")


        lbl_ocjena.grid(row=0, column=0, sticky=tk.W, pady=2)
        self.lbl_biljeska.grid(row=1, column=0, sticky=tk.W, pady=2)


        ent_ocjena = tk.OptionMenu(self.window4, self.ocjena, "1", "2", "3","4","5")
        ent_ocjena.grid(row=0, column=1, pady=2, )

        ent_biljeska = tk.Entry(master=self.window4,textvariable=self.biljeska)
        ent_biljeska.grid(row=1, column=1, pady=2)
        btn_unesi = tk.Button(self.window4, text='Unesi',command=self.ispis)
        btn_unesi.grid(row=3, column=1,pady=2)
        self.window4.mainloop()
    def ispis(self):
        print(dt.day,dt.month,self.ocjena.get(),self.biljeska.get())
OdabirRazreda()

Answer 1

在 tkinter 中，mainloop 方法很复杂，我很少使用你的代码，但输出不是预期的，但是，很少转换到框架方法它工作良好，如果有用的话可以通过很少修改的代码

import tkinter as tk
import datetime

dt = datetime.datetime.today()


class OdabirRazreda():
    def __init__(self):
        self.root = tk.Tk()

        self.window2 = tk.Frame(self.root)
        self.window2.pack()

        g = tk.Button(self.window2, command=self.unos,)
        g.pack()

        self.ocjena = tk.StringVar()
        self.razred = tk.StringVar()
        self.biljeska = tk.StringVar()
        self.ucenik = tk.StringVar()
        self.root.mainloop()

    def unos(self):
        self.window2.pack_forget() # 'can call destroy() also if no use in further'
        self.window4 = tk.Frame()
        self.window4.pack()

        lbl_ocjena = tk.Label(self.window4, text="Ocjena")
        self.lbl_biljeska = tk.Label(self.window4, text="Bilješka:")

        lbl_ocjena.grid(row=0, column=0, sticky=tk.W, pady=2)
        self.lbl_biljeska.grid(row=1, column=0, sticky=tk.W, pady=2)

        ent_ocjena = tk.OptionMenu(self.window4, self.ocjena, "1", "2", "3", "4", "5")
        ent_ocjena.grid(row=0, column=1, pady=2, )

        ent_biljeska = tk.Entry(master=self.window4, textvariable=self.biljeska)
        ent_biljeska.grid(row=1, column=1, pady=2)

        btn_unesi = tk.Button(self.window4, text='Unesi', command=self.ispis)
        btn_unesi.grid(row=3, column=1, pady=2)

    def ispis(self):
        print(dt.day, dt.month, self.ocjena.get(), self.biljeska.get())


OdabirRazreda()

刚刚为 windows 创建了框架并且循环被分配给主 window 作为 root...

如何在 Python tkinter 中使用 Stringvar 收集字符串？

How to collect a string with Stringvar inside Python tkinter?

python

string

tkinter