以下代码将显示一个小的Tkinter用户界面,但是我的按钮不会触发名为copy_loop的循环。我已经尝试了几个小时,但无法弄清楚该如何解决。任何帮助将不胜感激。
import tkinter as tk
import threading
class App():
def __init__(self, master):
self.isrunning = False
self.button1 = tk.Button(main, text='start')
self.button1.bind = ("<Button-1>", self.startrunning)
self.button1.pack()
self.button2 = tk.Button(main, text='stop')
self.button2.bind = ("<Button-1>", self.stoprunning)
self.button2.pack()
def startrunning(self, event):
self.isrunning = True
t = threading.Thread(target=self.copy_loop)
t.start()
def stoprunning(self, event):
self.isrunning = False
def copy_loop(self):
while self.isrunning:
print("Running...")
main = tk.Tk()
app = App(main)
main.mainloop()
答案 0 :(得分:2)
您有一个等号,不应有一个等号。该命令应为:
self.button1 = tk.Button(main, text='start')
self.button1.bind("<Button-1>", self.startrunning)
或者更加整洁:
self.button1 = tk.Button(main, text='start', command=self.startrunning)
并且您的方法签名应具有event=None
:
def startrunning(self, event=None):
或更灵活:
def startrunning(self, *args):
答案 1 :(得分:2)
bind
是一个函数,而不是一个属性。您在哪里:
self.button1.bind = ("<Button-1>", self.startrunning)
您实际上是对实例上的bind
函数进行覆盖。现在是一个元组。
相反,请执行以下操作:
self.button1.bind("<Button-1>", self.startrunning)
button2
也是如此。