Kivy:如何使用时钟.在这种情况下要正确安排

Question

因此，我正在编写一些代码，以便在随机时间段(5-10秒仅用于测试目的(后通过虚拟键随机发送按键。我正试图添加Clock.schedule_once，但以我现在的状态，它每秒钟都在启动，因为它陷入了一个时间循环。我一直在绞尽脑汁，试图弄清楚如何正确实现这一点，但我似乎无法想出什么办法，所以我正在联系你们，看看你们是否能就可能的解决方案提供任何意见。

def v_key_timer(self, timer, wnd):
while timer > 0:
vkey = self.char2key(self.get_char_key(randrange(1, 5)))
intrvl = randrange(5, 10)  # Sets a random time between 1-4 minutes to do a keypress
self.select_window(wnd)
if (timer - intrvl) <= 0:
win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), 0, 0)  # Keypress Down
time.sleep(.5)
win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), win32con.KEYEVENTF_KEYUP, 0)  # Keypress Up
time.sleep(timer)
timer = 0
else:
win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), 0, 0)  # Keypress Down
time.sleep(.5)
win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), win32con.KEYEVENTF_KEYUP, 0)  # Keypress Up
time.sleep(intrvl)
timer -= intrvl

我想在日志运行中让用户输入他们希望运行的时间，并创建一个倒计时计时器供用户查看，但在此之前，我需要更改我设置的当前计时器系统的运行方式，并配置了时钟。时间表可能是最好的选择，因为现在，当time.sleep运行时，程序不会关闭。

Answer 1

通常，您应该避免在kivy应用程序中使用time.sleep((，因为它会冻结事件处理例程。

这是我根据两份预定工作提出的建议。在短时间内，按键作业在随机时间后安排一次，并无限期地重新安排自己。第二个预定作业负责停止按键作业。

# main.py
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.clock import Clock
from datetime import datetime
from random import randrange

class Screens(ScreenManager):
pass

class MyScreen(Screen):
# scheduled job instance
v_key_timer_job = None
# window name
v_key_timer_window = None
def v_key_timer(self, timer, wnd):
self.v_key_timer_window = wnd
if self.v_key_timer_job is None:
print(f'Key timer for "{self.v_key_timer_window}" started for {timer} seconds')
# update buttons state
self.ids.start_button.disabled, self.ids.abort_button.disabled = True, False
# schedule next key press
self.v_key_timer_job = Clock.schedule_once(self.v_key_timer_do, randrange(5, 10))
# schedule end of timer
Clock.schedule_once(self.v_key_timer_end, timer)
def v_key_timer_end(self, dt):
if self.v_key_timer_job is not None:
print('Key timer stopped')
# update buttons state
self.ids.start_button.disabled, self.ids.abort_button.disabled = False, True
# unschedule v_key_timer_job
self.v_key_timer_job.cancel()
self.v_key_timer_job = None
def v_key_timer_do(self, dt):
print(f't{datetime.now().strftime("%Y-%m-%d %H:%M:%S")} Doing {self.v_key_timer_window} keypress')
# vkey = self.char2key(self.get_char_key(randrange(5, 10)))
# self.select_window(self.v_key_timer_window)
# win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), 0, 0)  # Keypress Down
# win32api.keybd_event(vkey, win32api.MapVirtualKey(vkey, 0), win32con.KEYEVENTF_KEYUP, 0)  # Keypress Up
# schedule next key press
self.v_key_timer_event = Clock.schedule_once(self.v_key_timer_do, randrange(5, 10))

class KeyTimer(App):
pass

KeyTimer().run()

和kv文件：

# keytimer.kv
Screens:
MyScreen:
<MyScreen>:
BoxLayout:
orientation: "vertical"
BoxLayout:
size_hint: 1, 0.1
Label:
text: 'timer [s]'
TextInput:
id: timer
text: '60'
BoxLayout:
size_hint: 1, 0.1
Label:
text: 'wnd'
TextInput:
id: wnd
text: 'window_name'
Button:
id: start_button
text: "Start key timer"
on_release: root.v_key_timer(int(timer.text), wnd.text)
Button:
id: abort_button
disabled: True
text: "Abort key timer"
on_release: root.v_key_timer_end(None)