使用 tkinter 按钮停止多个线程

Question

我正在尝试使用一个按钮来停止我在 for 循环中创建的所有线程。有没有停止线程的方法？

这是我的代码：

import threading
import time
from tkinter import *

tk= Tk()

class go(threading.Thread):

    def __init__(self,c):
        threading.Thread.__init__(self)
        self.c = c
    def run(self):
        while 1 == 1 :
            time.sleep(5)
            print('This is thread: '+str(self.c))


for count in range(10):
    thread = go(count)
    thread.start()

btn1 = Button(tk, text="Stop All", width=16, height=5)
btn1.grid(row=2,column=0)

tk.mainloop()

Answer 1

您需要在 run() 方法中提供退出 while 循环的条件。通常使用 threading.Event 对象：

def __init__(self, c):
    ...
    self.stopped = threading.Event()

然后你需要检查 Event 对象是否使用 Event.is_set():

设置

def run(self):
    while not self.stopped.is_set():
        ...

所以要终止线程，只需设置Event对象。您可以创建一个 class 方法来执行此操作：

def terminate(self):
    self.stopped.set()

下面是基于您的修改示例：

import threading
import time
from tkinter import *

tk = Tk()

class go(threading.Thread):
    def __init__(self,c):
        threading.Thread.__init__(self)
        self.c = c
        self.stopped = threading.Event()

    def run(self):
        while not self.stopped.is_set():
            time.sleep(5)
            print(f'This is thread: {self.c}')
        print(f'thread {self.c} done')

    def terminate(self):
        self.stopped.set()


threads = []  # save the created threads
for count in range(10):
    thread = go(count)
    thread.start()
    threads.append(thread)

def stop_all():
    for thread in threads:
        thread.terminate()

btn1 = Button(tk, text="Stop All", width=16, height=5, command=stop_all)
btn1.grid(row=2, column=0)

tk.mainloop()

使用 tkinter 按钮停止多个线程

Using tkinter button to stop multiple threads

python

multithreading

tkinter

python-multithreading