所以我正在用 tkinter 制作一個秒表程式。
目前，我正在為秒表實作停止按鈕。
我可以啟動秒表，它會很好地更新標簽，但我的結束按鈕不起作用，我似乎無法弄清楚原因。
到目前為止，這是我的代碼：
from tkinter import *
from time import sleep
import threading
root = Tk()
root.title("Clock")
class Buttons:
def __init__(self, master):
self.menu = Menu(master)
master.config(menu=self.menu)
self.menu.add_command(label="Stopwatch")
self.menu.add_command(label="Timer")
self.menu.add_command(label="Quit", command=quit)
self.stopwatchStart = Button(master, text="Start", command=self.test_start)
self.stopwatchStart.config(height=2, width=5)
self.stopwatchStart.grid(row=0)
self.stopwatchEnd = Button(master, text="End", command=self.stopwatch_End)
self.stopwatchEnd.config(height=2, width=5)
self.stopwatchEnd.grid(row=1)
self.labelSeconds = Label(master, text="Seconds:")
self.labelSeconds.grid(row=0, column=1)
self.stopwatchSeconds = Label(master, text="0")
self.stopwatchSeconds.grid(row=0, column=2)
def test_start(self):
print("Starting thread")
t = threading.Thread(target=self.stopwatch_Start)
t.setDaemon(True)
t.start()
def stopwatch_Start(self, test=False):
print("Stopwatch started")
stopwatch_seconds = "0"
stopwatchBreak = test
print(f"stopwatchBreak == {stopwatchBreak}")
while not stopwatchBreak:
print(stopwatch_seconds)
stopwatch_seconds = int(stopwatch_seconds)
stopwatch_seconds = 1
self.stopwatchSeconds.config(text=stopwatch_seconds)
root.update()
sleep(1)
print("Stopping stopwatch")
return
def stopwatch_End(self):
Buttons.stopwatch_Start(self, True)
print("Attempting to end")
b = Buttons(root)
root.mainloop()
順便說一下，我正在使用執行緒同時從 tkinter 運行秒表和視窗。
此外，我在函式中放置了幾個 print() 以查看哪些成功，哪些失敗。我認為問題可能與 test_start() 中的執行緒有關。單擊結束按鈕時不會結束的回圈在 stopwatch_Start() 中。它只是不斷地計數。
我沒有收到錯誤資訊
有沒有人對停止秒表有任何建議/替代方法？
uj5u.com熱心網友回復：
看看這段代碼
def stopwatch_End(self):
Buttons.stopwatch_Start(self, True)
print("Attempting to end")
這是你的問題 =>
Buttons.stopwatch_Start(self, True)
糾正這個：
self.stopwatch_Start(True)
在這里，您在按鈕類上呼叫“秒表”，這是一個未系結的功能！！！“Buttons.stopwatch”與“self.stopwatch”不同，后者系結到實體。
from tkinter import *
from time import sleep
from threading import Thread
from threading import Event
root = Tk()
root.title("Clock")
class Buttons:
def __init__(self, master):
self.evt = Event()
self.menu = Menu(master)
master.config(menu=self.menu)
self.menu.add_command(label="Stopwatch")
self.menu.add_command(label="Timer")
self.menu.add_command(label="Quit", command=quit)
self.stopwatchStart = Button(master, text="Start", command=self.test_start)
self.stopwatchStart.config(height=2, width=5)
self.stopwatchStart.grid(row=0)
self.stopwatchEnd = Button(master, text="End", command=self.stopwatch_End)
self.stopwatchEnd.config(height=2, width=5)
self.stopwatchEnd.grid(row=1)
self.labelSeconds = Label(master, text="Seconds:")
self.labelSeconds.grid(row=0, column=1)
self.stopwatchSeconds = Label(master, text="0")
self.stopwatchSeconds.grid(row=0, column=2)
def test_start(self):
print("Starting thread")
t = Thread(target=self.stopwatch_Start)
t.setDaemon(True)
t.start()
def stopwatch_Start(self, test=False):
print("Stopwatch started")
stopwatch_seconds = "0"
stopwatchBreak = test
print(f"stopwatchBreak == {stopwatchBreak}")
# self.evt.is_set() will force the loop to check its actually state if it True or not
while not self.evt.is_set():
print(stopwatch_seconds)
stopwatch_seconds = int(stopwatch_seconds)
stopwatch_seconds = 1
self.stopwatchSeconds.config(text=stopwatch_seconds)
root.update()
sleep(1)
print("Stopping stopwatch")
return
def stopwatch_End(self):
#we set self.evt to True so that the while loop will be broken
self.evt.set()
print("Attempting to end")
b = Buttons(root)
root.mainloop()
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