好的,以下是使用keyboard函数来代替自定义函数on_key_down()的代码:
```python
import pgzrun
from random import randint
import keyboard
WIDTH = 400
HEIGHT = 708
bird = Actor('bird1', (75, 350))
pipes = []
for i in range(3):
pipe_top = Actor('top', (500 + i * 200, 0))
pipe_bottom = Actor('bottom', (500 + i * 200, 500))
pipes.append((pipe_top, pipe_bottom))
game_over = False
score = 0
def update():
global game_over, score
if not game_over:
bird.y += 2
for pipe_top, pipe_bottom in pipes:
pipe_top.x -= 2
pipe_bottom.x -= 2
if pipe_top.right < 0:
pipe_top.left = WIDTH
pipe_bottom.left = WIDTH
pipe_top.y = randint(-250, -50)
pipe_bottom.y = pipe_top.y + 800
score += 1
if bird.colliderect(pipe_top) or bird.colliderect(pipe_bottom):
game_over = True
if bird.bottom > HEIGHT:
game_over = True
if keyboard.space:
bird.y -= 50
def draw():
screen.blit('background', (0, 0))
for pipe_top, pipe_bottom in pipes:
pipe_top.draw()
pipe_bottom.draw()
bird.draw()
screen.draw.text(str(score), (10, 10), color='white', fontsize=30)
if game_over:
screen.draw.text('Game Over!', center=(WIDTH/2, HEIGHT/2), color='white', fontsize=60)
pgzrun.go()
```
在这个修改后的代码中,我们使用了keyboard模块的space属性来检测空格键是否被按下。如果被按下,就将鸟的上升高度增加到50。
这样可以使代码更简洁,但需要注意的是,使用keyboard函数时需要保证游戏窗口处于活动状态,否则无法响应键盘事件。