If语句在一段时间后停止工作，并且字体未呈现

Question

我正在用pygame&python 3.10.0使用VSCode一切都很好，但这个if语句在一段时间后停止工作，字体也没有绘制，但我无法确定问题所在，对于if语句，它通常运行到10或11分，但它可以更快，比如2:

if player.rect.colliderect(food):
pygame.sprite.Sprite.kill(food)
food.rect.x = random.randrange(20, 1700)
food.rect.y = random.randrange(20, 860)
all_sprites_list.add(food)
score += 1
print(score)

---

整个代码：

import pygame
import sys
import time
import random
import ctypes
from ctypes import wintypes
from pygame import sprite
from pygame.draw import rect
from pygame.event import pump, wait
from pygame import font
pygame.font.init()
myappid = 'elementalstudios.snake.Alpha 0_1' # arbitrary string
ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(myappid)

#------ Initialize Variables------#
# Player
player_width = 20
player_height = 20
# Food
food_width = 10
food_height = 10
# Colours
seafoam_gr = (159, 226, 191)
black = (0, 0, 0)
blue = (0, 0, 255)
red = (255, 0, 0)
green = (0, 255, 0)
white = (255, 255, 255)
# Score 
score = 0
#------ Score Font Initialize ------#
font = pygame.font.Font(None, 50)
text = font.render("Score:", False, white, None)
#------Sprites Class------#
class Sprite(pygame.sprite.Sprite):
def __init__(self, color, height, width):
super().__init__()
self.image = pygame.Surface([width, height])
self.image.fill(seafoam_gr)
self.image.set_colorkey(black)
pygame.draw.rect(self.image,
color,
pygame.Rect(0, 0, width, height))

self.rect = self.image.get_rect()
def moveRight(self, pixels):
self.rect.x += pixels
def moveLeft(self, pixels):
self.rect.x -= pixels
def moveUp(self, speed):
self.rect.y -= speed * speed / 5
def moveDown(self, speed):
self.rect.y += speed * speed / 5
#------ Font Class ------#
def create_font(t,s = 24, colour_font = white, bold = False, italic = False):
font = pygame.font.Font("prstart.ttf", s, bold, italic)
text = font.render(t, True, colour_font)
return text
#------ Initialize Pygame and Window------#
pygame.init()
icon = pygame.image.load('Icon.ico')
pygame.display.set_icon(icon)
gameDisplay = pygame.display.set_mode((1920,1080), pygame.FULLSCREEN)
#rect = pygame.Rect( * gameDisplay.get_rect().center, 0, 0).inflate(100, 100)
pygame.display.set_caption("Blocky")
gameDisplay.fill(black)
clock = pygame.time.Clock()
running = True
#------Initialize Sprites------#
all_sprites_list = pygame.sprite.Group()
player = Sprite(seafoam_gr, player_height, player_width)
food = Sprite(red, food_height, food_width)
player.rect.x = 960
player.rect.y = 540
food.rect.x = 20 #random.randrange(20, 1800)
food.rect.y = 30 #random.randrange(20, 1050)
#------Add Sprites to sprite list------#
all_sprites_list.add(player)
all_sprites_list.add(food)
clock = pygame.time.Clock()
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
running = False
#------Eating------#
if player.rect.colliderect(food):
pygame.sprite.Sprite.kill(food)
food.rect.x = random.randrange(20, 1700)
food.rect.y = random.randrange(20, 860)
all_sprites_list.add(food)
score += 1
print(score)
#------ Score Draw ------#
text_rect = text.get_rect()
text_rect.center = (100, 150)
gameDisplay.blit(text, text_rect)
#------Key Movement------#
keys = pygame.key.get_pressed()
# Move Left
if keys[pygame.K_a]:
player.moveLeft(3)
if keys[pygame.K_LCTRL]:
player.moveLeft(5)
if keys[pygame.K_LEFT]:
player.moveLeft(3)
if keys[pygame.K_LCTRL]:
player.moveLeft(5)
# Move Right
if keys[pygame.K_d]:
player.moveRight(5)
if keys[pygame.K_LCTRL]:
player.moveRight(5)
if keys[pygame.K_RIGHT]:
player.moveRight(3)
if keys[pygame.K_LCTRL]:
player.moveRight(5)
# Move Down
if keys[pygame.K_s]:
player.moveDown(3)
if keys[pygame.K_LCTRL]:
player.moveDown(5)
if keys[pygame.K_DOWN]:
player.moveDown(3)
if keys[pygame.K_LCTRL]:
player.moveDown(5)
# Move Up
if keys[pygame.K_w]:
player.moveUp(3)
if keys[pygame.K_LCTRL]:
player.moveUp(5)
if keys[pygame.K_UP]:
player.moveUp(3)
if keys[pygame.K_LCTRL]:
player.moveUp(5)
all_sprites_list.update()
gameDisplay.fill(black)
all_sprites_list.draw(gameDisplay)
pygame.display.flip()
clock.tick(60)
pygame.quit()
quit()

Answer 1

不需要kill食物对象。改变食物的位置就足够了。pygame.sprite.Sprite.kill只是从所有Gorup中删除精灵对象。因此，调用kill然后将对象添加回组是没有意义的。

文本不会显示，因为您在清除显示之前绘制了文本。pygame.Surface.fill使用纯色填充曲面。之前绘制的所有内容都将被清除。CCD_ 5是CCD_ 6之后的文本
如果分数发生变化，则必须再次渲染文本表面。

我建议简化移动玩家的代码。请参见按住键时如何使精灵移动。

class Sprite(pygame.sprite.Sprite):
def __init__(self, color, x, y, height, width):
super().__init__()
self.image = pygame.Surface([width, height])
self.image.fill(color)
self.image.set_colorkey(black)
self.rect = self.image.get_rect(topleft = (x, y))
self.x, self.y = self.rect.x, self.rect.y
def move(self, move_x, move_y, speed_up):
if move_x or move_y:
direction = pygame.math.Vector2(move_x, move_y)
direction.scale_to_length(5 if speed_up else 3)
self.x += direction.x
self.y += direction.y
self.rect.x, self.rect.y = round(self.x), round(self.y)

player = Sprite(seafoam_gr, 400, 300, player_height, player_width)
food = Sprite(red, 20, 30, food_height, food_width)

while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
running = False
if player.rect.colliderect(food):
food.rect.x = random.randrange(20, 780)
food.rect.y = random.randrange(20, 580)
score += 1
# render text
text = font.render("Score: " + str(score), False, white, None)
keys = pygame.key.get_pressed()
move_x = ((keys[pygame.K_d] or keys[pygame.K_RIGHT]) - (keys[pygame.K_a] or keys[pygame.K_LEFT]))
move_y = ((keys[pygame.K_s] or keys[pygame.K_DOWN]) - (keys[pygame.K_w] or keys[pygame.K_UP]))
player.move(move_x, move_y, keys[pygame.K_LCTRL])
all_sprites_list.update()

gameDisplay.fill(black)
# draw text
gameDisplay.blit(text, text.get_rect(center = (100, 150)))

all_sprites_list.draw(gameDisplay)
pygame.display.flip()
clock.tick(60)
pygame.quit()
quit()