Question

如何在按钮功能中传递Entry的值？

我想将值传递给函数onConfirm()

from tkinter import Tk, ttk, Frame, Button, Label, Entry, Text, Checkbutton, \
    Scale, Listbox, Menu, BOTH, RIGHT, RAISED, N, E, S, W, \
    HORIZONTAL, END, FALSE, IntVar, StringVar, messagebox as box

class Example(Frame):

    def __init__(self, parent):
        Frame.__init__(self, parent, background="skyblue")
        self.parent = parent
        self.parent.title("Simple Window")
        self.style = ttk.Style()
        self.style.theme_use("default")
        self.centreWindow()
        self.pack(fill=BOTH, expand=1)



        firstNameLabel = Label(self, text="First Name")
        firstNameLabel.grid(row=0, column=0, padx=(100,10), pady=(100,10))

        firstNameText = Entry(self, width=20)
        firstNameText.grid(row=0, column=1, pady=(100,10))


        okBtn = Button(self, text="OK", width=10, command= lambda: self.onConfirm(firstNameText.get()))
        okBtn.grid(row=0, column=2,padx = 5, pady=(100,10))

       # closeBtn = Button(self, text="Close", width=10, command=self.onExit)
        #closeBtn.grid(row=4, column=3, padx=5, pady=3, sticky=W+E)

    def centreWindow(self):
        w = 500
        h = 300
        sw = self.parent.winfo_screenwidth()
        sh = self.parent.winfo_screenheight()
        x = (sw - w)/2
        y = (sh - h)/2
        self.parent.geometry('%dx%d+%d+%d' % (w, h, x, y))



   def onConfirm(self,s):
        box.showinfo("Information", s)

def main():
    root = Tk()

    #root.geometry("250x150+300+300")    # width x height + x + y
    # we will use centreWindow instead
    root.resizable(width=FALSE, height=FALSE)
    # .. not resizable
    app = Example(root)
    root.mainloop()

if __name__ == '__main__':
    main()

Answer 1

您不必传递变量，因为您正在使用类。尝试改为

## instance object can be used throughout the class
self.firstNameText = Entry(self, width=20)
self.firstNameText.grid(row=0, column=1, pady=(100,10))

## Button just calls function
okBtn = Button(self, text="OK", width=10, command=self.onConfirm)
okBtn.grid(row=0, column=2,padx = 5, pady=(100,10))

## function has access to instance variable
def onConfirm(self):
    s=self.firstNameText.get()
    box.showinfo("Information", s)

在按钮功能中传递Entry的值

1 个答案: