Pygame 键盘事件

Pygame 识别 KEYUP 和 KEYDOWN 事件。pygame.key 模块定义了用于处理键盘交互的有用函数。当按下和释放按键时，pygame.KEYDOWN 和 pygame.KEYUP 事件会被插入到事件队列中。key 属性是一个整数 ID，代表键盘上的每个按键。

import pygame, sys
pygame.init()
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Hello World")
while True:
   for event in pygame.event.get():
      if event.type == pygame.QUIT:
         pygame.quit()
         sys.exit()
      if event.type == pygame.KEYDOWN:
         key=pygame.key.name(event.key)
         print (key, "Key is pressed")
      if event.type == pygame.KEYUP:
         key=pygame.key.name(event.key)
         print (key, "Key is released")

运行以上代码，并在 Pygame 窗口激活时按下各种按键。以下是 Python 控制台上的示例输出。

q Key is pressed
q Key is released
right shift Key is released
1 Key is pressed
1 Key is released
enter Key is pressed
enter Key is released
backspace Key is pressed
backspace Key is released
x Key is pressed
x Key is released 
home Key is pressed
home Key is released
f1 Key is pressed
f1 Key is released
left Key is pressed
left Key is released
right Key is pressed
right Key is released
up Key is pressed
up Key is released
down Key is pressed
down Key is released

正如我们所看到的，event.key 属性返回与每个按键关联的唯一标识符。在游戏场景中，左右、上下箭头键经常使用。如果检测到特定按键按下，我们可以编写相应的逻辑。

pygame.key 模块中其他有用的属性如下：