用于检查条目的 Tkinter 按钮

Question

我正在尝试创建一个按钮来检查条目中的信息。如果信息为 True，则 window 应该被清除并显示两个新标签，否则新的 window 应该弹出并显示一条错误消息。目前我无法弄清楚为什么代码每次都在 else 块中结束，无论我在条目中键入什么。有人能够解释为什么以及如何解决这个问题吗？也许“Entry.get()”方法与我预期的不同？..

from tkinter import *


class FirstPrototype:
    def __init__(self, top=None):
        self.top = top
        top.title("Prototype")
        top.configure(bg="black", highlightbackground="grey", highlightcolor="darkgrey")

        wWidth = top.winfo_reqwidth()
        wHeight = top.winfo_reqheight()

        x = int(top.winfo_screenwidth() / 2 - (wWidth / 2))
        y = int(top.winfo_screenheight() / 3 - (wHeight / 2))

        top.geometry(f"+{x}+{y}")
        top.minsize(300, 132)

        self.Account = Button(text="Account", command=self.log_reg).pack()

    def log_reg(self):
        self.clear_window()

        Label(text="ID:", bg="darkgrey").pack(fill=X)
        e1 = Entry()
        e1.pack(fill=X)
        Label(text="PW:", bg="darkgrey").pack(fill=X)
        e2 = Entry()
        e2.pack(fill=X)
        Button(text="Login", command=self.check_id).pack(fill=X)
        Button(text="Register").pack(fill=X)

        return e1, e2

    def clear_window(self):
        for widget in top.winfo_children():
            widget.destroy()

    def check_id(self):
        e1, e2 = self.log_reg()
        u_id = e1.get()
        u_pw = e2.get()

        if u_id == "Qwe123" and u_pw == "Qwe123":
            self.clear_window()

            Label(top, text="Nickname:", bg="darkgrey").pack(fill=X)
            Label(top,text="Examplenickname",bg="darkgrey").pack(fill=X)

        else:
            error_w = Tk()
            error_w.title("ERROR")
            Label(error_w, text="ERROR").place(relx=0.5, rely=0.5, anchor=CENTER)


top = Tk()
exa_gui = FirstPrototype(top)
top.mainloop()

Answer 1

解释请参考我的评论

这里：

from tkinter import *


class FirstPrototype:
    def __init__(self, top=None):
        self.top = top
        top.title("Prototype")
        top.configure(bg="black", highlightbackground="grey", highlightcolor="darkgrey")

        wWidth = top.winfo_reqwidth()
        wHeight = top.winfo_reqheight()

        x = int(top.winfo_screenwidth() / 2 - (wWidth / 2))
        y = int(top.winfo_screenheight() / 3 - (wHeight / 2))

        top.geometry(f"+{x}+{y}")
        top.minsize(300, 132)

        self.Account = Button(text="Account", command=self.log_reg).pack()
        self.e1 = None
        self.e2 = None
        
    def log_reg(self):
        #self.clear_window()

        Label(text="ID:", bg="darkgrey").pack(fill=X)
        self.e1 = Entry()
        self.e1.pack(fill=X)
        Label(text="PW:", bg="darkgrey").pack(fill=X)
        self.e2 = Entry()
        self.e2.pack(fill=X)
        Button(text="Login", command=self.check_id).pack(fill=X)
        Button(text="Register").pack(fill=X)


    def clear_window(self):
        for widget in top.winfo_children():
            widget.destroy()

    def check_id(self):
        #e1, e2 = self.log_reg()
        u_id = self.e1.get()
        u_pw = self.e2.get()

        print(u_id)
        
        if u_id == "Qwe123" and u_pw == "Qwe123":
            self.clear_window()

            Label(top, text="Nickname:", bg="darkgrey").pack(fill=X)
            Label(top,text="Examplenickname",bg="darkgrey").pack(fill=X)

        else:
            error_w = Tk()
            error_w.title("ERROR")
            Label(error_w, text="ERROR").place(relx=0.5, rely=0.5, anchor=CENTER)


top = Tk()
exa_gui = FirstPrototype(top)
top.mainloop()

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