我正在尝试创建多帧GUI。我正在使用的代码正常工作。然而，当我在一些帧中添加一些图片时，GUI出现在两个窗口中：一个具有正常的功能和排列;一个人里面没有任何东西。如果我关闭其中任何一个，它们都会关闭。
我使用Python 2.7。
请有人向我解释发生了什么事吗？
编辑：我现在知道原因了。这是因为我使用tk.Toplevel而不是tk.Tk.使用tk.Tk，我对双窗口没有问题，但我无法显示我的图片。有什么帮助吗？
这是我的代码：
import tkinter as tk # python3
#import Tkinter as tk # python
from PIL import ImageTk, Image
TITLE_FONT = ("Helvetica", 18, "bold")
img = Image.open('arrow.png')
class SampleApp(tk.Toplevel):
def __init__(self, *args, **kwargs):
tk.Toplevel.__init__(self, *args, **kwargs)
# the container is where we'll stack a bunch of frames
# on top of each other, then the one we want visible
# will be raised above the others
container = tk.Frame(self)
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.arrow = ImageTk.PhotoImage(img)
self.frames = {}
for F in (StartPage, PageOne, PageTwo):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
# put all of the pages in the same location;
# the one on the top of the stacking order
# will be the one that is visible.
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame("StartPage")
def show_frame(self, page_name):
'''Show a frame for the given page name'''
frame = self.frames[page_name]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is the start page", font=TITLE_FONT)
# label.pack(side="top", fill="x", pady=10)
label.grid(row=0)
arrow1 = tk.Label(self, image = self.controller.arrow)
arrow2 = tk.Label(self, image = self.controller.arrow)
arrow1.grid(row=1,column=0)
arrow2.grid(row=2,column=0)
button1 = tk.Button(self, text="Go to Page One",
command=lambda: controller.show_frame("PageOne"))
button2 = tk.Button(self, text="Go to Page Two",
command=lambda: controller.show_frame("PageTwo"))
button1.grid(row=1,column=1)
button2.grid(row=2,column=1)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 1", font=TITLE_FONT)
label.pack(side="top", fill="x", pady=10)
label.grid(row=0)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.grid(row=1,column=1)
class PageTwo(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 2", font=TITLE_FONT)
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
答案 0 :(得分：0)
您忘了在PageOne和PageTwo的标签中加入image=...选项。我添加了它。 ;）
此外，删除了Toplevel。或者，你仍然可以像你一样使用Toplevel，并在创建后隐藏root=tk.Tk()窗口。
#import tkinter as tk # python3
import Tkinter as tk # python
from PIL import ImageTk, Image
TITLE_FONT = ("Helvetica", 18, "bold")
img = Image.open('arrow.png')
class SampleApp(tk.Frame): #change to tk.Frame
def __init__(self, parent, *args, **kwargs): #added parent
tk.Frame.__init__(self, parent, *args, **kwargs) #added parent
# the container is where we'll stack a bunch of frames
# on top of each other, then the one we want visible
# will be raised above the others
container = tk.Frame(parent) #changed self to parent
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.arrow = ImageTk.PhotoImage(img)
self.frames = {}
for F in (StartPage, PageOne, PageTwo):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
# put all of the pages in the same location;
# the one on the top of the stacking order
# will be the one that is visible.
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame("StartPage")
def show_frame(self, page_name):
'''Show a frame for the given page name'''
frame = self.frames[page_name]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is the start page", font=TITLE_FONT)
# label.pack(side="top", fill="x", pady=10)
label.grid(row=0)
arrow1 = tk.Label(self, image = self.controller.arrow)
arrow2 = tk.Label(self, image = self.controller.arrow)
arrow1.grid(row=1,column=0)
arrow2.grid(row=2,column=0)
button1 = tk.Button(self, text="Go to Page One",
command=lambda: controller.show_frame("PageOne"))
button2 = tk.Button(self, text="Go to Page Two",
command=lambda: controller.show_frame("PageTwo"))
button1.grid(row=1,column=1)
button2.grid(row=2,column=1)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 1", font=TITLE_FONT,
image = self.controller.arrow) # Added
label.pack(side="top", fill="x", pady=10)
label.grid(row=0)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.grid(row=1,column=1)
class PageTwo(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 2", font=TITLE_FONT,
image = self.controller.arrow) # Added
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
if __name__ == "__main__":
root = tk.Tk() #Added
app = SampleApp(root) #added root
root.mainloop()