Question

我正在尝试使用python制作蛇游戏，但可惜的是我的蛇和苹果没有出现在屏幕上，我所看到的只是一个灰色的屏幕，上面没有任何东西，您能帮我吗？谢谢！附注-我也想解释一下为什么我当前的代码无法正常工作，所以将来我会避免使用它，再次感谢。

import pygame, sys, random, time
from pygame.locals import *

pygame.init()
mainClock = pygame.time.Clock()
windowWidth = 500
windowHeight = 500
windowSurface = pygame.display.set_mode((windowWidth, windowHeight), 0, 32)
red = (255, 0, 0)
green = (0, 255, 0)
color = (100, 100, 100)
snakeHead = [250, 250]
snakePosition = [[250, 250],[240, 250],[230, 250]]
applePosition = [random.randrange(1,50)*10,random.randrange(1,50)*10]

def collisionBoundarias(snakeHead):
    if snakeHead[0] >= 500 or snakeHead[0] < 0 or snakeHead[1] >= 500 or snakeHead[1] < 0:
        return 1
    else:
        return 0

def collisionSelf(SnakePosition):
    snakeHead = snakePosition[0]
    if snakeHead in snakePosition[1:]:
        return 1
    else:
        return 0

while True:
    windowSurface.fill(color)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.type == pygame.K_RIGHT or event.key == pygame.K_d:
                snakeHead[0] += 10
            if event.type == pygame.K_LEFT or event.key == pygame.K_a:
                snakeHead[0] -= 10
            if event.type == pygame.K_UP or event.type == pygame.K_w:
                snakeHead[1] += 10
            if event.type == pygame.K_DOWN or event.type == pygame.K_s:
                snakeHead[1] -= 10

    def displaySnake(snakePosition):
        for position in snakePosition:
            pygame.draw.rect(windowSurface   ,red,pygame.Rect(position[0],position[1],10,10))

    def display_apple(windowSurface, applePosition, apple):
        windowSurface.blit(apple ,(applePosition[0], applePosition[1]))

    snakePosition.insert(0,list(snakeHead))
    snakePosition.pop()


    def displayFinalScore(displayText, finalScore):
        largeText = pygame.font.Font('freesansbold.ttf',35)
        TextSurf = largeText.render(displayText, True, (255, 255, 255))
        TextRect = TextSurf.get_rect()
        TextRect.center = ((windowWidth/2),(windowHeight/2))
        windowSurface.blit(TextSurf, TextRect)
        pygame.display.update()
        time.sleep(2)

    def collisionApple(applePosition, score):
        applePosition = [random.randrange(1,50)*10,random.randrange(1,50)*10]
        score += 1
        return applePosition, score

    if snakeHead == applePosition:
        applePosition, score = collisionApple(applePosition, score)
        snakePosition.insert(0,list(snakeHead))


    pygame.display.update()
    clock = pygame.time.Clock()
    clock.tick(20)

Answer 1

如注释中所述，这些对象不会出现，因为您永远不会通过调用display_apple和import pygame, sys, random, time from pygame.locals import * pygame.init() mainClock = pygame.time.Clock() windowWidth = 500 windowHeight = 500 windowSurface = pygame.display.set_mode((windowWidth, windowHeight), 0, 32) clock = pygame.time.Clock() red = (255, 0, 0) green = (0, 255, 0) color = (100, 100, 100) snakeHead = [250, 250] snakePosition = [[250, 250],[240, 250],[230, 250]] applePosition = [random.randrange(1,50)*10,random.randrange(1,50)*10] apple = pygame.Surface((10, 10)) apple.fill(green) score = 0 speed = 10 # Define a velocity variable (a list or better a pygame.Vector2). velocity = pygame.Vector2(speed, 0) def collisionBoundarias(snakeHead): return snakeHead[0] >= 500 or snakeHead[0] < 0 or snakeHead[1] >= 500 or snakeHead[1] < 0 def collisionApple(applePosition, score): applePosition = [random.randrange(1,50)*10,random.randrange(1,50)*10] score += 1 return applePosition, score def displaySnake(snakePosition): for position in snakePosition: pygame.draw.rect(windowSurface, red, pygame.Rect(position[0], position[1], 10, 10)) def display_apple(windowSurface, applePosition, apple): windowSurface.blit(apple, (applePosition[0], applePosition[1])) while True: # Event handling. for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() sys.exit() if event.type == pygame.KEYDOWN: # Replace `type` with `key`. if event.key == pygame.K_RIGHT or event.key == pygame.K_d: velocity.x = speed velocity.y = 0 if event.key == pygame.K_LEFT or event.key == pygame.K_a: velocity.x = -speed velocity.y = 0 if event.key == pygame.K_UP or event.key == pygame.K_w: velocity.x = 0 velocity.y = -speed if event.key == pygame.K_DOWN or event.key == pygame.K_s: velocity.x = 0 velocity.y = speed # Game logic. snakeHead[0] += velocity.x # Update the x-position every frame. snakeHead[1] += velocity.y # Update the y-position every frame. snakePosition.insert(0, snakeHead) snakePosition.pop() if snakeHead == applePosition: applePosition, score = collisionApple(applePosition, score) snakePosition.insert(0, snakeHead) # Drawing. windowSurface.fill(color) displaySnake(snakePosition) display_apple(windowSurface, applePosition, apple) pygame.display.update() clock.tick(20)函数来绘制它们。在while循环中一次又一次地定义这些函数也没有意义。

这是代码的固定版本。我更改了运动代码，以使蛇在每一帧中连续运动。（它仍然可以改进，但我尝试使其保持简单。）

CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION

蛇游戏：蛇和苹果没有出现在屏幕上

1 个答案: