Question

我希望这不是重复的，看来我是少数几个倾向于将Tkinter用作Tkinter而不是TK的人之一。几乎我正在使用类制作Windows。第二个窗口创建一个用户，但是在另一个类中使用该值“ username”时遇到麻烦。我想念什么？

（免责声明，窗户丑陋，我专注于使功能正常工作。）我尝试将值username设置为clicku()函数的全局部分。...我尝试将“ username”设置为Startwindow下的一个函数（具有其自己的定义），直接将其拉出（如此处所示）...我已经移动了它，并尝试与地方合作...我迷路了。将条目作为自己的类可以保存此问题... ???

from tkinter import *


class Window(Frame):

    def __init__(self, master=None, *args, **kwargs):
        Frame.__init__(self,master,*args,**kwargs)
        self.pack()
        self.pack_propagate(0)
        self.labelone = Label(self, text = "Welcome to our class! Click start to begin")
        self.labelone.grid(row=1,column=1)
        self.buttonone = Button(self, text="start", command=click)
        self.buttonone.grid(row=2,column=1)


class Startwindow(Frame):

    def __init__(self, master=None, *args, **kwargs):
        Frame.__init__(self,master,*args,**kwargs)
        self.grid(row=5,column=5)
        self.grid_propagate(0)
        self.text = Label(self, text = "What is your name?")
        self.text.grid(row=0,column=0)
        self.entry = Entry(self, width=15)
        self.entry.grid(row=1,column=0)
        self.buttontwo = Button(self, text="enter", command=clicku)
        self.buttontwo.grid(row=1,column=1)
        self.username = self.entry.get()



class introwindow(Frame):

    def __init__(self, master=None,*args,**kwargs):
        Frame.__init__(self,master,*args,**kwargs)
        user = str(w2.username)
        self.grid()
        self.grid_propagate(0)
        self.a = Label(self, text = "Aki: ")
        self.a.grid(row = 0, column = 0)
        self.sp1 = Label(self, text = "Hi" + w2.username)
        self.sp1.grid(row = 0, column = 1)
        self.sp2 = Label(self, text = "Nice to meet you!")
        self.sp1.grid(row = 1, column = 1)
        self.talk = Entry(self, width = 15)


def click():
    global w2
    w.destroy()
    w2 = Startwindow(root,width=500,height=500)


def clicku():
    w2.destroy()
    w3 = introwindow(root,width=500,height=500)






root = Tk()
w = Window(root, bg="red",width=500,height=500)

root.mainloop()

我只是希望在introwindow Label中将用户名打印在sp1中。

Answer 1

您可以通过创建tkinter StringVar的全局实例来实现。这样做是对您的问题中张贴的代码（我也进行了更新以更严格地遵循PEP 8 - Style Guide for Python Code）。

您当前的设计不允许充分利用它们（这就是为什么我将其设置为全局变量）的原因。但是，为了将来参考，这里有一些additional information，以介绍如何使用它们。

from tkinter import *


class Window(Frame):
    def __init__(self, master=None, *args, **kwargs):
        Frame.__init__(self, master, *args, **kwargs)
        self.pack()
        self.pack_propagate(0)
        self.labelone = Label(self, text="Welcome to our class! Click start to begin")
        self.labelone.grid(row=1, column=1)
        self.buttonone = Button(self, text="start", command=click)
        self.buttonone.grid(row=2,column=1)


class StartWindow(Frame):
    def __init__(self, master=None, *args, **kwargs):
        Frame.__init__(self, master, *args, **kwargs)
        self.grid(row=5,column=5)
        self.grid_propagate(0)
        self.text = Label(self, text="What is your name?")
        self.text.grid(row=0,column=0)
        self.entry = Entry(self, width=15, textvariable=username)
        self.entry.grid(row=1,column=0)
        self.buttontwo = Button(self, text="enter", command=clicku)
        self.buttontwo.grid(row=1,column=1)
        self.username = self.entry.get()


class IntroWindow(Frame):
    def __init__(self, master=None, *args, **kwargs):
        Frame.__init__(self,master, *args, **kwargs)
        self.grid()
        self.grid_propagate(0)
        self.a = Label(self, text="Aki: ")
        self.a.grid(row=0, column=0)
        self.sp1 = Label(self, text="Hi " + username.get())
        self.sp1.grid(row=0, column=1)
        self.sp2 = Label(self, text="Nice to meet you!")
        self.sp1.grid(row=1, column=1)
        self.talk = Entry(self, width=15)


def click():
    global w2
    w.destroy()
    w2 = StartWindow(root, width=500, height=500)


def clicku():
    w2.destroy()
    w3 = IntroWindow(root, width=500, height=500)


if __name__ == '__main__':

    root = Tk()
    username = StringVar()
    w = Window(root, bg="red", width=500, height=500)

    root.mainloop()

Answer 2

由于条目窗口小部件是introwindow的属性，因此您只需要在销毁窗口之前在上调用条目窗口小部件get的方法。然后，您可以将值传递给下一个窗口的构造函数

例如，它看起来像这样：

def clicku():
    name = w2.entry.get()
    print("clickU:", name)
    w2.destroy()
    w3 = IntroWindow(root, width=500, height=500, name=name)

当然，您需要修改IntroWindow类以接受名称。

如何在不同的类中使用Entry内容？

2 个答案: