我试着写一个简单的时钟应用程序。它工作得很好,但我想知道,是否有办法使用Drawing()类中simple_clock(App)的方法并将信息存储在那里
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.graphics import Line
from kivy.core.image import Image
from kivy.uix.button import Button
from kivy.clock import Clock
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.uix.gridlayout import GridLayout
class another_screen(Screen):
pass
class Drawing():
pass
presentation = Builder.load_file("simple_clock_kivy.kv")
class simple_clock(App):
sw_started = False
sw_seconds = 0
def update_clock(self, nap):
if self.sw_started:
self.sw_seconds += nap
print(self.sw_seconds)
def start_stop(self):
self.sw_started = True
def reset(self):
if self.sw_seconds:
self.sw_seconds = 0
else:
pass
def stop_clock(self):
self.sw_started = False
def on_start(self):
Clock.schedule_interval(self.update_clock, 0)
def build(self):
return presentation
if __name__=="__main__":
simple_clock().run()
<another_screen>:
name: "other"
FloatLayout:
Drawing:
id: other
Button:
id: start_stop
text: 'Start'
size_hint: 0.2, 0.05
pos_hint: {"x": 0, "bottom": 1}
on_press: app.start_stop()
Button:
id: reset
text: 'Reset'
size_hint: 0.2, 0.05
pos_hint: {"x": 0.6, "bottom": 1}
on_press: app.reset()
Button:
id: stop
text: 'Stop'
size_hint: 0.2, 0.05
pos_hint: {"x": 0.8, "bottom": 1}
on_press: app.stop_clock()
有人按下“开始”按钮,时间开始滴答作响,允许画图“停止”按钮,时间停止。我想把绘图的持续时间保存到一个变量中
类App()中定义的访问属性/方法
在
class App()
之外的任何类中App.get_running_app()
获取对象app
App.get_running_app().update_clock()
App.get_running_app().sw_seconds
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