我正在用Tkinter设计一个GUI。它有许多帧(页面(，通过按下一帧中的按钮，该帧将被销毁，并显示下一帧。每个按钮都有可变的图像，所以我需要一个功能来旋转显示的每个页面的按钮图像。
我写了下面的代码，照片的地址发生了变化(Pagestart类的(def counter(中的self.Address(，但我认为button.config无法更新按钮的图像！！！为什么？
(用于解释：主类showframe函数中的countercounter函数负责更新pagestart中的计数器函数。(
这段代码的输出显示了一个带有一个按钮的框架，它的图像是恒定的，不能更新。
import tkinter as tk
from tkinter import ttk
from PIL import Image, ImageTk
import time
import os
import subprocess as sp
import signal
global counter0, counter1
counter0=0
counter1=0
class Project(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.configure(background="#000000")
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.container=container
self.frames = {}
for F in ( Pagestart, PageOne):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(Pagestart)
def show_frame(self, cont):
self.sw = 1000
self.sh = 1800
self.cont=cont
for frame in self.frames.values():
frame.grid_remove()
frame = self.frames[cont]
frame.configure(background="#000000")
frame.grid()
frame.winfo_toplevel().geometry('%dx%d+%d+%d' % (self.sw,self.sh,0,0))
A=Pagestart(parent=self.container, controller=self)
self.Pagestart=Pagestart
B=A.button
def countercounter(B):
def count1():
global counter0, counter1
A.counter()
if (self.cont==Pagestart):
B.after(100,count1)
count1()
countercounter(B)
def twoside(self, inputaddress, startframe, stopframe):
self.input = inputaddress
self.startframe = startframe
self.stopframe = stopframe
global counter0, counter1
def count():
global counter0, counter1
if (counter1==1):
counter0 -=1
if (counter1==0):
counter0 += 1
self.Address=('%s%s' % (str(self.input),str(counter0))+".jpg")
if (counter0==self.stopframe):
counter1=1
if (counter0==self.startframe):
counter1=0
count()
def sendAddress(self):
return self.Address
class Pagestart(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.ButtonStyle = ttk.Style()
self.ButtonStyle.configure("Tabedstart.TButton", background="#000000", borderwidth=0)
self.ButtonStyle.map("Tabedstart.TButton", background=[('selected', "#000000")])
self.button = ttk.Button(self, style="Tabedstart.TButton", command=lambda: controller.show_frame(PageOne))
self.button.pack(pady=320)
self.counter()
def counter(self):
self.inputaddress = "/home/pi/Documents/Reference0/"
self.controller.twoside(self.inputaddress, 0, 138)
self.Address = self.controller.sendAddress()
self.photo = Image.open(self.Address)
self.photo = ImageTk.PhotoImage(self.photo)
self.button.image=self.photo
self.button.config(image=self.photo)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.ButtonStyle = ttk.Style()
self.ButtonStyle.configure("Tabedstart.TButton", background="#000000", borderwidth=0)
self.ButtonStyle.map("Tabedstart.TButton", background=[('selected', "#000000")])
self.button = ttk.Button(self, style="Tabedstart.TButton", command=lambda: controller.show_frame(Pagestart))
self.button.pack(pady=320)
self.counter()
def counter(self):
self.inputaddress = "/home/pi/Documents/Reference1/"
self.controller.twoside(self.inputaddress, 0, 138)
self.Address = self.controller.sendAddress()
self.photo = Image.open(self.Address)
self.photo = ImageTk.PhotoImage(self.photo)
self.button.image=self.photo
self.button.config(image=self.photo)
if __name__ == "__main__":
app = Project()
app.mainloop()
您不销毁帧，但只使用grid_forget()/grid_remove()隐藏它。
不要创建Pagestart的新实例，因为您已经有用显示的Pagestart的旧实例
frame = self.frames[cont]
frame.grid()
在这种情况下，您应该使用ie.更改图像
frame.counter()
工作代码：
我使用self.counter和self.animation_direction而不是全局变量counter0、counter1。
我不使用嵌套函数，因为它可读性较差。
我使用change_image()每100ms 更改一次图像
import tkinter as tk
from tkinter import ttk
from PIL import Image, ImageTk
class Project(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
self.counter = 1
self.animation_direction = 1 # it will add `+1` to self.counter
self.sw = 1000
self.sh = 1800
container = tk.Frame(self)
container.configure(background="#000000")
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.container = container
self.frames = {}
for F in ( PageStart, PageOne):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(PageStart)
def show_frame(self, cont):
self.cont = cont
for frame in self.frames.values():
frame.grid_remove()
frame = self.frames[cont]
frame.configure(background="#000000")
frame.grid()
frame.winfo_toplevel().geometry('%dx%d+%d+%d' % (self.sw,self.sh,0,0))
#frame.counter()
self.change_image()
def twoside(self, inputaddress, startframe, stopframe):
self.input = inputaddress
self.startframe = startframe
self.stopframe = stopframe
self.counter += self.animation_direction
self.address = '%s%s.jpg' % (self.input, self.counter)
if self.counter == self.stopframe:
self.animation_direction = -self.animation_direction
if self.counter == self.startframe:
self.animation_direction = -self.animation_direction
def get_address(self):
return self.address
def change_image(self):
if self.cont == PageStart:
self.frames[self.cont].counter()
self.after(100, self.change_image)
class PageStart(tk.Frame): # PEP8: UpperCaseNames for classes
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.ButtonStyle = ttk.Style()
self.ButtonStyle.configure("Tabedstart.TButton", background="#000000", borderwidth=0)
self.ButtonStyle.map("Tabedstart.TButton", background=[('selected', "#000000")])
self.button = ttk.Button(self, style="Tabedstart.TButton", command=lambda: controller.show_frame(PageOne))
self.button.pack(pady=320)
self.counter()
def counter(self):
self.inputaddress = "/home/pi/Documents/Reference0/"
self.controller.twoside(self.inputaddress, 0, 138)
self.address = self.controller.get_address() # PEP8: lower_case_names for functions/methods and variables
self.photo = Image.open(self.address)
self.photo = ImageTk.PhotoImage(self.photo)
self.button.image = self.photo
self.button.config(image=self.photo)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.ButtonStyle = ttk.Style()
self.ButtonStyle.configure("Tabedstart.TButton", background="#000000", borderwidth=0)
self.ButtonStyle.map("Tabedstart.TButton", background=[('selected', "#000000")])
self.button = ttk.Button(self, style="Tabedstart.TButton", command=lambda: controller.show_frame(PageStart))
self.button.pack(pady=320)
self.counter()
def counter(self):
self.inputaddress = "/home/pi/Documents/Reference1/"
self.controller.twoside(self.inputaddress, 0, 138)
self.address = self.controller.get_address()
self.photo = Image.open(self.address)
self.photo = ImageTk.PhotoImage(self.photo)
self.button.image = self.photo
self.button.config(image=self.photo)
if __name__ == "__main__":
app = Project()
app.mainloop()