python - Pygame KEYDOWN 名称错误

Question

import pygame, sys, pygame.mixer 

pygame.init()

size = width,height = 1256,640
screen = pygame.display.set_mode(size)
player_x = 0
player_y = 0
movex = 0

maintheme = pygame.mixer.Sound("music/mainthemes.ogg")
maintheme.play()

player_w = pygame.image.load("characters/player/character_w.png").convert_alpha()
player_a = pygame.image.load("characters/player/character_a.png").convert_alpha()
player_s = pygame.image.load("characters/player/character_s.png").convert_alpha()
player_d = pygame.image.load("characters/player/character_d.png").convert_alpha()

background1 = pygame.image.load("maps/background1.png").convert_alpha()

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type==KEYDOWN:
            if event.key==K_a:
                movex=-1

        screen.fill((0,0,0))
        screen.blit(background1,(0,0))
        screen.blit(player_s,(player_x,player_y))

        pygame.display.update() 

错误是这样的: 文件“/home/fenton/Desktop/main.py”，第 27 行，位于 如果 event.type==KEYDOWN:NameError: 名称 'KEYDOWN' 未定义【4.9秒完成】

Answer 1

你需要做的:

if event.type==pygame.KEYDOWN:

否则，Python 不知道 KEYDOWN 在哪里定义。

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此外，您可能希望将其更改为:

elif event.type==pygame.KEYDOWN:

因为 event.type 不可能是 pygame.QUIT 和 pygame.KEYDOWN。