Я новичок в киви. Я пытаюсь создать игру в понг, и все работает правильно, но я не могу переключиться на новый экран после победы игрока. Я хочу переключиться на новый экран после того, как игрок выиграл, и хочу отобразить сообщение на этом экране (что-то вроде - Вы выиграли !!), а также отобразить две кнопки: Воспроизвести снова / Go назад в Меню. Я пытаюсь переключиться на экран в файле .py, но он не работает. Ниже приведен код .py и .kv.
pong.py:
import kivy
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import (
NumericProperty, ReferenceListProperty, ObjectProperty)
from kivy.uix.screenmanager import ScreenManager,WipeTransition
from kivy.vector import Vector
from kivy.clock import Clock
kivy.require('1.11.1')
class PongPaddle(Widget):
score = NumericProperty(0)
def bounce_ball(self, ball):
if self.collide_widget(ball):
vx, vy = ball.velocity
offset = (ball.center_y - self.center_y) / (self.height / 2)
bounced = Vector(-1 * vx, vy)
vel = bounced * 1.3
ball.velocity = vel.x, vel.y + offset
class PongBall(Widget):
velocity_x = NumericProperty(0)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
def move(self):
self.pos = Vector(*self.velocity) + self.pos
class PongGame(Widget):
ball = ObjectProperty(None)
player1 = ObjectProperty(None)
player2 = ObjectProperty(None)
def __init__(self, *args, **kwargs):
super(PongGame,self).__init__(*args,**kwargs)
Clock.schedule_interval(self.update, 1.0 / 60.0)
def serve_ball(self, vel=(4, 0)):
self.ball.center = self.center
self.ball.velocity = vel
def update(self, dt):
self.ball.move()
#bounce of paddles
self.player1.bounce_ball(self.ball)
self.player2.bounce_ball(self.ball)
#bounce ball off bottom or top
if (self.ball.y < self.y) or (self.ball.top > self.top):
self.ball.velocity_y *= -1
#went of to a side to score point?
if self.ball.x < self.x:
self.player2.score += 1
self.serve_ball(vel=(4, 0))
if self.ball.x > self.width:
self.player1.score += 1
self.serve_ball(vel=(-4, 0))
if self.player1.score==5:
self.ball.center = self.center
self.ball.velocity = self.vel=(0, 0)
mainapp.sm.current='winner1'
if self.player2.score==5:
self.ball.center = self.center
self.ball.velocity = self.vel=(0, 0)
mainapp.sm.current='winner2'
def on_touch_move(self, touch):
if touch.x < self.width / 3:
self.player1.center_y = touch.y
if touch.x > self.width - self.width / 3:
self.player2.center_y = touch.y
class Manager(ScreenManager):
pass
class MainApp(App):
def build(self):
self.load_kv('pong.kv')
self.sm=Manager()
return Manager(transition=WipeTransition())
if __name__ == '__main__':
mainapp = MainApp()
mainapp.run()
pong.kv:
<PongBall>:
size: 50, 50
canvas:
Ellipse:
pos: self.pos
size: self.size
<PongPaddle>:
size: 25, 200
canvas:
Rectangle:
pos:self.pos
size:self.size
<PongGame>:
ball: pong_ball
player1: player_left
player2: player_right
canvas:
Rectangle:
pos: self.center_x-5, 0
size: 10, self.height
Label:
font_size: 70
center_x: root.width / 4
top: root.top - 50
text: str(root.player1.score)
Label:
font_size: 70
center_x: root.width * 3 / 4
top: root.top - 50
text: str(root.player2.score)
PongBall:
id: pong_ball
center: self.parent.center
PongPaddle:
id: player_left
x: root.x
center_y: root.center_y
PongPaddle:
id: player_right
x: root.width-self.width
center_y: root.center_y
<Manager>:
id: screen_manager
Screen:
name: 'home'
BoxLayout:
orientation: 'vertical'
Label:
text: 'WELCOME TO PING PONG GAME'
font_size: 45
text_size: self.size
halign: 'center'
valign: 'middle'
Button:
text: 'Start New Game'
halign: 'center'
valign: 'middle'
font_size: 30
text_size: self.size
on_release: root.current = 'game';game.serve_ball()
Button:
text: 'Rules'
halign: 'center'
valign: 'middle'
font_size: 30
text_size: self.size
pos: self.pos
on_release: root.current= 'rule'
Screen:
name: 'game'
PongGame:
id: game
Screen:
name: 'rule'
BoxLayout:
orientation: 'vertical'
Label:
text: 'Please read the rules carefully.'
text_size: self.size
font_size: 30
halign: 'center'
valign: 'middle'
Label:
text: 'Players need to move their pong paddles and save the balls from dashing into their sides of the wall.'
text_size: self.size
font_size: 25
Label:
text: 'The player who pushes the ball into their opponents wall gets a score.'
text_size: self.size
font_size: 25
Label:
text: 'The first player to reach score 5 wins the game.'
text_size: self.size
font_size: 25
Label:
text: 'All The Best!!!!'
text_size: self.size
font_size: 30
halign: 'center'
valign: 'middle'
Button:
text: 'Home'
text_size: self.size
font_size: 25
halign: 'center'
valign: 'middle'
on_release: root.current = 'home'
Screen:
name: 'winner1'
GridLayout:
cols: 1
Label:
text: 'Congratulations Player1 !!! You won against Player2!!!!'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
GridLayout:
cols: 2
Button:
text: 'Play Again'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
on_release: root.current = 'game'; game.serve_ball()
Button:
text: 'Home'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
on_release: root.current = 'home'
Screen:
name: 'winner2'
GridLayout:
cols: 1
Label:
text: 'Congratulations Player2 !!! You won against player 1!!!!'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
GridLayout:
cols: 2
Button:
text: 'Play Again'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
on_release: root.current = 'game'; game.serve_ball()
Button:
text: 'Home'
text_size: self.size
font_size: 45
halign: 'center'
valign: 'middle'
on_release: root.current = 'home'```