我正在Kivy中构建一个基本的猜谜游戏应用程序，以学习它的基础知识，但还没有完全了解它。当我进入下一个屏幕（TimeToGuess）时，我需要访问guesss_left，以便在编写逻辑来删除猜测时（如果猜错了）并最终耗尽它们（如果用完了）。
我已经尝试过将TimeToGuess类属性设置为Guesses以便通过剧院方式访问它，但是在按钮释放按钮上使用canvas.clear（）并切换到TimeToGuess不适用于我。
这是python文件代码：
from kivy import *
import random
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.screenmanager import ScreenManager, Screen
guesses_left = int()
computer_num = random.randint(1, 10)
user_guess = int()
class WannaPlay(Screen):
pass
class Guesses(Screen):
guesses_left = int()
class TimeToGuess(Screen):
def user_is_guessing(self):
if user_guess != computer_num:
guesses_left -= 1
class Winner(Screen):
pass
class Loser(Screen):
pass
class ScreenManage(ScreenManager):
pass
kv = Builder.load_file('guessinggame.kv')
class GuessingGameApp(App):
def build(self):
return kv
if __name__ == '__main__':
GuessingGameApp().run()
和.kv：
ScreenManage:
WannaPlay:
Guesses:
TimeToGuess:
Winner:
Loser:
<WannaPlay>:
name: 'start'
GridLayout:
cols: 1
Label:
text: 'Want to Play the Guessing Game?'
GridLayout:
cols: 2
Button:
name: 'yes'
text: 'Yes'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'guess_choice'
Button:
name: 'no'
text: 'No'
on_release:
app.stop()
<Guesses>
name: 'guess_choice'
id: guesses_choice
GridLayout:
cols: 1
Label:
text: 'How Many Guesses Would You Like?'
GridLayout:
cols: 4
Button:
name: 'guess_amount_one'
text: '1'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 1
print(guesses_left)
Button:
name: 'guess_amount_two'
text: '2'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 2
print(guesses_left)
Button:
name: 'guess_amount_three'
text: '3'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 3
print(guesses_left)
Button:
name: 'guess_amount_four'
text: '4'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 4
print(guesses_left)
<TimeToGuess>
name: 'time_to_guess'
GridLayout:
cols: 1
Label:
text: 'Guess a number between 1 and 10'
GridLayout:
cols: 5
Button:
name: 'guess_1'
text: '1'
Button:
name: 'guess_2'
text: '2'
Button:
name: 'guess_3'
text: '3'
Button:
name: 'guess_4'
text: '4'
Button:
name: 'guess_5'
text: '5'
Button:
name: 'guess_6'
text: '6'
Button:
name: 'guess_7'
text: '7'
Button:
name: 'guess_8'
text: '8'
Button:
name: 'guess_9'
text: '9'
Button:
name: 'guess_10'
text: '10'
先谢谢您的帮助
这是更新后的代码，以显示检查后的答案实际上是如何帮助解决至少该问题的（我相信我还会遇到更多问题。大声笑）
Python代码：
from kivy import *
import random
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.screenmanager import ScreenManager, Screen
guesses_left = int()
user_guess = int()
computer_num = random.randint(1, 10)
class WannaPlay(Screen):
pass
class Guesses(Screen):
pass
def user_is_guessing(guesses_amount=guesses_left, computer_num=computer_num):
if user_guess != computer_num and guesses_amount == 0:
#subtract from guesses_left go to lose page
pass
elif guesses_amount == computer_num:
#go to win page
pass
elif guesses_amount != computer_num:
#subtract from guesses_left and have the user guess again
pass
class TimeToGuess(Screen):
pass
class Winner(Screen):
pass
class Loser(Screen):
pass
class ScreenManage(ScreenManager):
pass
kv = Builder.load_file('guessinggame.kv')
class GuessingGameApp(App):
def build(self):
return kv
if __name__ == '__main__':
GuessingGameApp().run()
.kv：
ScreenManage:
WannaPlay:
Guesses:
TimeToGuess:
Winner:
Loser:
<WannaPlay>:
name: 'start'
GridLayout:
cols: 1
Label:
text: 'Want to Play the Guessing Game?'
GridLayout:
cols: 2
Button:
name: 'yes'
text: 'Yes'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'guess_choice'
Button:
name: 'no'
text: 'No'
on_release:
app.stop()
<Guesses>
name: 'guess_choice'
id: guesses_choice
GridLayout:
cols: 1
Label:
text: 'How Many Guesses Would You Like?'
GridLayout:
cols: 4
Button:
name: 'guess_amount_one'
text: '1'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 1
print(guesses_left)
Button:
name: 'guess_amount_two'
text: '2'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 2
print(guesses_left)
Button:
name: 'guess_amount_three'
text: '3'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 3
print(guesses_left)
Button:
name: 'guess_amount_four'
text: '4'
on_release:
root.manager.transition.duration = 0
root.manager.current = 'time_to_guess'
guesses_left = 4
print(guesses_left)
<TimeToGuess>
name: 'time_to_guess'
GridLayout:
cols: 1
Label:
text: 'Guess a number between 1 and 10'
GridLayout:
cols: 5
Button:
name: 'guess_1'
text: '1'
Button:
name: 'guess_2'
text: '2'
Button:
name: 'guess_3'
text: '3'
Button:
name: 'guess_4'
text: '4'
Button:
name: 'guess_5'
text: '5'
Button:
name: 'guess_6'
text: '6'
Button:
name: 'guess_7'
text: '7'
Button:
name: 'guess_8'
text: '8'
Button:
name: 'guess_9'
text: '9'
Button:
name: 'guess_10'
text: '10'
最佳答案
我已经有一段时间没有接触过Kivy了，所以我不确定这是否行得通，但是如果遵循基本的OOP，则应该行得通。
您可以只在特定类之外声明guesss_left变量，从而使所有类都可以访问它。即：
from kivy import *
import random
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.screenmanager import ScreenManager, Screen
# Initilize here
guesses_left = int()
class WannaPlay(Screen):
pass
class Guesses(Screen):
# instead of here
pass
class TimeToGuess(Screen):
pass
class Winner(Screen):
pass
class Loser(Screen):
pass
class ScreenManage(ScreenManager):
pass
kv = Builder.load_file('guessinggame.kv')
class GuessingGameApp(App):
def build(self):
return kv
if __name__ == '__main__':
# Or initilize here
# guesses_left = int()
GuessingGameApp().run()
如果仍然无法运行，请发表评论，我将在可能的情况下进一步调查。