我正在寻找大约3个小时的原因，但我找不到任何解决方案。
没有错误，但程序似乎没有检测到我的键输入。另外，我没有看到我的代码有什么问题。
另外，我不认为我理解event.key和pygame.event.get（）是如何运作的。如果有人向我解释，我将非常感激。
这是我的Ascii游戏中的代码，它只是代码的开头，到目前为止我已经完成了。
class maingame:
def __init__(self):
exit = False
def processkey(self):
global hotkey,crazy
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.key == K_SPACE:
crazy = 1
if event.key == K_DOWN:
dir = 's'
y_option -= 1
hotkey = 2
if event.key == pygame.K_w:
dir = 'w'
y_option += 1
hotkey = 1
if event.key == K_LEFT:
dir = 'a'
if event.key == K_RIGHT:
dir = 'd'
else:
hotkey = 1
y_option = 0
crazy = 0
def displaymanu(self,hotkey):
print(">" if hotkey == 1 else " ","play")
print(">" if hotkey == 2 else " ","quit")
if hotkey == 1 and crazy == 1:
self.play()
elif hotkey == 2 and crazy == 1:
exit = True
if __name__ == '__main__':
while not quit:
displayee = maingame()
os.system('cls')
displayee.processkey()
displayee.processkey()
displayee.displaymanu(hotkey)
PyGame将not work without a screen/window。因此，您的代码需要首先初始化PyGame，然后打开一个窗口（或全屏显示）。
根据我对您的代码的理解，它看起来应该显示一个菜单：
> Play
Quit
按↑/↓（或w / s）移动选项之间的>光标，然后空格运行该选项。
你的代码的一个问题是你试图解释displaymanu()函数中的键击。最好保持一个函数做一个单一的事情，所以processkey()中的所有键处理和displaymanu()中的屏幕绘制。
我修改了你的代码到它工作的地步。这涉及修改类，以便初始化PyGame显示。菜单需要显示在窗口中，因此添加了一个新函数drawTextAt()来代替print()。类Maingame的许多成员变量都有范围问题，但只是指定self.variable-name（使它们成为类的成员）修复了这些问题。
我还添加了一个游戏状态，以显示键处理需要根据游戏当前所处的阶段进行更改。它从菜单开始，其中向上/向下只是更改菜单选项。但是后来在游戏过程中，Up / Down需要做一些完全不同的事情。
import pygame
import os
# Window size
WINDOW_WIDTH = 400
WINDOW_HEIGHT = 400
# colours
DARK = ( 50, 50, 50 )
RED = ( 255, 50, 50 )
class Maingame:
def __init__(self):
# Initialise PyGame
pygame.init()
pygame.font.init()
# Initialise a window
pygame.display.set_caption("Main Game")
self.screen = pygame.display.set_mode( ( WINDOW_WIDTH, WINDOW_HEIGHT ), pygame.DOUBLEBUF )
# menu font
self.font = pygame.font.SysFont(None, 20)
self.hotkey = 1
self.crazy = 0
self.y_option = 0
self.game_state = 0 # state=0 -> show menu, 1 => Game, 2-> Game Over
def processkey(self):
# no key pressed yet
self.crazy = 0
dir_code = ''
exit = False
# Detect keys pressed
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit = True
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
dir_code = ' '
self.crazy = 1
elif event.key == pygame.K_s or event.key == pygame.K_DOWN:
dir_code = 's'
self.y_option -= 1
self.hotkey = 2
elif event.key == pygame.K_w or event.key == pygame.K_UP:
dir_code = 'w'
self.y_option += 1
self.hotkey = 1
elif event.key == pygame.K_LEFT:
dir_code = 'a'
elif event.key == pygame.K_RIGHT:
dir_code = 'd'
else:
self.hotkey = 1
self.y_option = 0
self.crazy = 0
print( "DEBUG - game_state=[%d], dir_code is [%s], hotkey is [%d], crazy=[%d]" % ( self.game_state, dir_code, self.hotkey, self.crazy ) )
# Act on the keys pressed (if any)
if self.game_state == 0: # menu mode
if self.hotkey == 1 and self.crazy == 1:
self.game_state = 1 # start the game
elif self.hotkey == 2 and self.crazy == 1:
exit = True
elif self.game_state == 1: # game mode
pass # TODO
elif self.game_state == 2: # game-over mode
pass # TODO
return exit
def drawTextAt( self, text, coord, foreground_colour=(255,255,255) ):
""" Convert the specified text into a font-bitmap, and draw it
onto the screen at the given co-ordinates """
text_bitmap = self.font.render( text, True, foreground_colour )
self.screen.blit( text_bitmap, coord )
def displaymanu( self ):
""" Draw the Menu """
# MENU
self.screen.fill( DARK )
# Draw the menu options
prefix = [ " ", " " ]
prefix[ self.hotkey-1 ] = "> "
self.drawTextAt( prefix[0] + "Play", ( 30, 100 ) )
self.drawTextAt( prefix[1] + "Quit", ( 30, 150 ) )
def displaygame( self ):
""" Draw the Game Screen """
# GAME SCREEN
self.screen.fill( RED )
self.drawTextAt( "GAME - #TODO", ( 30, 180 ) )
def displaygameover( self ):
""" Draw the Game-Over Screen """
# GAME OVER SCREEN
self.screen.fill( RED )
self.drawTextAt( "* GAME OVER *", ( 30, 180 ) )
if __name__ == '__main__':
# Initialise PyGame and the window
displayee = Maingame()
quit = False
while not quit:
#os.system('cls')
# Draw the correct display for the state
if displayee.game_state == 0:
displayee.displaymanu()
elif displayee.game_state == 1:
displayee.displaygame()
elif displayee.game_state == 2:
displayee.displaygameover()
# Push all drawing to the screen
pygame.display.flip()
# Handle keys
quit = displayee.processkey()
看起来你没有把pygame.放在这里的一些变量之前：
if event.key == K_SPACE: # Does not have pygame prefix
crazy = 1
if event.key == K_DOWN: # Does not have pygame prefix
dir = 's'
y_option -= 1
hotkey = 2
if event.key == pygame.K_w: # Does have pygame prefix
dir = 'w'
y_option += 1
hotkey = 1
if event.key == K_LEFT: # Does not have pygame prefix
dir = 'a'
if event.key == K_RIGHT: # Does not have pygame prefix
dir = 'd'
将pygame.添加到那些，它应该在那之后检测。奇怪的是它在运行时没有拉出NameError异常。