单击关闭，然后再次单击运行时，出现此错误“ RuntimeError：线程只能启动一次”

问题描述

import threading
from tkinter import *


running = False


def run():
    global running
    c = 1
    running = True
    while running:
        print(c)
        c += 1


run_thread = threading.Thread(target=run)


def kill():
    global running
    running = False


root = Tk()
button = Button(root,text='Run',command=run_thread.start)
button.pack()
button1 = Button(root,text='close',command=kill)
button1.pack()
button2 = Button(root,text='Terminate',command=root.destroy)
button2.pack()
root.mainloop()

click here for error img ....我正在使用线程以某种方式使我的ui在进入循环时，在关闭循环且无法再次重新启动时起作用。

解决方法

如错误所述，终止的线程无法再次启动。

您需要创建另一个线程：

import threading
from tkinter import *

running = False

def run():
    global running
    c = 1
    running = True
    while running:
        print(c)
        c += 1

def start():
    if not running:
        # no thread is running,create new thread and start it
        threading.Thread(target=run,daemon=True).start()

def kill():
    global running
    running = False

root = Tk()
button = Button(root,text='Run',command=start)
button.pack()
button1 = Button(root,text='close',command=kill)
button1.pack()
button2 = Button(root,text='Terminate',command=root.destroy)
button2.pack()
root.mainloop()