我一直在搜索很多东西，但我仍然不知道是什么问题。我有两个窗口，要求一些值，结果执行了不同的功能。我试图将“ Enter”键绑定到不同窗口的按钮（因此应执行不同的功能），但这不起作用。
我唯一能做的就是将密钥绑定到整个Frame，然后将其取消绑定并再绑定一次。它可以工作，但是我很好奇为什么我不能将“ Enter”键链接到单独的按钮上而没有错误出现。提前致谢！
这是我的代码：
import tkinter as tk
class Page(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
self.shared_data = {
"number_of_frequencies": tk.StringVar(),
"frequencies": []}
container = tk.Frame(self)
container.grid()
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
for F in (StartPage, PageOne):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def create_entry_widget(self, i):
self.number = tk.StringVar()
self.number.set('')
self.shared_data["frequencies"].append(self.number)
new_widget = tk.Entry(self.master, textvariable=self.number)
return new_widget
def show_frame(self, c):
for frame in self.frames.values():
frame.grid_remove()
frame = self.frames[c]
frame.grid()
global number_of_frequencies
try:
number_of_frequencies = int(self.shared_data["number_of_frequencies"].get())
for i in range(number_of_frequencies):
tk.Label(self.master, text="Frequency "+str(i+1)).grid(row=i, column=0, padx=10, pady=5)
self.entry_widgets = self.create_entry_widget(i)
self.entry_widgets.grid(row=i, column=1, padx=10, pady=5)
page1 = self.get_page(PageOne)
tk.Button(self, text="Exit",
command=lambda: self.quitALL()).grid(row=i+1, column=0, padx=10, pady=10)
self.button1 = tk.Button(self, text = " Done ",
command=lambda: [page1.enter_freqs(), self.quitALL()])
self.unbind_all('<Return>') # work
self.bind('<Return>', (lambda a: [page1.enter_freqs(), self.quitALL()])) # work
# self.button1.bind('<Return>', (lambda a: [page1.enter_freqs(), self.quitALL()])) #doesn't work
self.button1.grid(row=i+1, column=1, padx=10, pady=10)
frame.tkraise()
except:
frame.tkraise()
def get_page(self, page_class):
return self.frames[page_class]
def quitALL(self):
self.destroy()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller=controller
self.text = tk.Text(self, bg='gray93', bd=0, height=1, width=30, font=('Helvetica', 14))
self.text.insert(tk.INSERT, "Please enter number of frequencies:")
self.text.grid(padx=10, pady=10)
entry = tk.Entry(self, textvariable=self.controller.shared_data["number_of_frequencies"])
entry.grid(padx=10)
self.controller.bind('<Return>', (lambda a: controller.show_frame(PageOne))) # work
self.button = tk.Button(self, text=" Done ",
command=lambda: controller.show_frame(PageOne))
# self.button.bind('<Return>', (lambda a: controller.show_frame(PageOne))) # doesn't work
self.button.grid(padx=10, pady=10)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller=controller
self.freq_list = self.controller.shared_data["frequencies"]
self.freq_list_int = []
def enter_freqs(self):
for freq in self.freq_list:
self.freq_list_int.append(int(freq.get()))
self.func(self.freq_list_int)
def func(self, freq_list):
print('some stuff')
if __name__ == "__main__":
app = Page()
app.mainloop()