为什么在这种情况下事件始终是pygame.MOUSEBUTTONDOWN？

该代码似乎是在试图“吸引”用户，而不是在发生点击时简单地做出反应。没有roundnum玩家的鼠标事件，通常一次只有一个。处理每个事件。

在事件驱动程序（即，所有pygame程序中的99％）中，通常将它们作为实时事件进行处理，并利用系统时间来确定将来何时需要发生。这样就可以不使用代码pygame.time.delay()，并为用户界面提供了更好的流程。

下面的代码使用一个简单的list-of-lists数据结构来绘制每个矩形，名称，颜色和上次单击的时间，以绘制“ simon”矩形。将所有矩形数据保存在这样的列表中，可使程序在列表上循环，为每个按钮执行相同的代码。更少的代码可以减少出错的机会，并使代码更简单，更简洁。每当您发现自己复制代码块，然后进行简单的修改时，最好停一会儿，想知道是否有更好的方法。保留pygameRect对象还可以使您进行简单的碰撞检测。

因此，button的时间字段（最初为零）用于确定是否需要用基色或高亮色绘制矩形。单击该按钮时，当前时间存储在该按钮中。然后将按钮绘制到屏幕上时，如果LIGHT_TIME自单击以来仍为毫秒，则将其突出显示。

import pygame

pygame.init()

WINDOW_WIDTH  = 1000
WINDOW_HEIGHT = 1000
FPS = 60 

RED         = ( 200,   0,   0 )
BLUE        = (   0,   0, 200 )
YELLOW      = ( 200, 200,   0 )
GREEN       = (   0, 200,   0 )
LIGHTRED    = ( 255,   0,   0 )
LIGHTBLUE   = (   0,   0, 255 )
LIGHTYELLOW = ( 255, 255,   0 )
LIGHTGREEN  = (   0, 255,   0 )

LIGHT_TIME   = 300 # milliseconds the button stays hghlighted for

# define the on-screen button areas & colour
#              name      base    pressed    click   rectangle
#                        colour  colour     time    
buttons = [  [ "red",    RED,    LIGHTRED,    0,    pygame.Rect( 200, 0, 400, 375 )   ],
             [ "blue",   BLUE,   LIGHTBLUE,   0,    pygame.Rect( 600, 0, 400, 375 )   ],
             [ "green",  GREEN,  LIGHTGREEN,  0,    pygame.Rect( 200, 375, 400, 375 ) ],
             [ "yellow", YELLOW, LIGHTYELLOW, 0,    pygame.Rect( 600, 375, 400, 375 ) ]  ]

# ---------- Main ----------

screen = pygame.display.set_mode( ( WINDOW_WIDTH, WINDOW_HEIGHT ) )
clock  = pygame.time.Clock()
game_over = False
while not game_over:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif ( event.type == pygame.MOUSEBUTTONUP ):
            mouse_pos = event.pos
            for i, b in enumerate( buttons ):                                 # for every button
                name, base_colour, pressed_colour, click_time, butt_rect = b  #   get the button's parts
                if ( butt_rect.collidepoint( mouse_pos ) ):                   #   was the mouse-click inside this?
                    print( "Button [" + name + "] pressed" )
                    buttons[i][3] = pygame.time.get_ticks()                   # update the button's click-time


    time_now = pygame.time.get_ticks()                                        # get the current time (in milliseconds)
    for b in buttons:                                                         # for every button
        name, base_colour, pressed_colour, click_time, butt_rect = b          #   get the button's parts
        if ( click_time > 0 and click_time + LIGHT_TIME > time_now ):         #   if the mouse-click was LIGHT_TIME ms before time-now
            colour = pressed_colour  # light-up colour                        #       colour the button light
        else:                                                                 #   otherwise,
            colour = base_colour     # base colour                            #       colour the button normally
        pygame.draw.rect( screen, colour, butt_rect, 0 )                      #   draw a filled rectangle in the colour, for the button


    pygame.display.update()
    clock.tick(FPS)

pygame.quit()