【发布时间】：2020-11-15 21:42:20
【问题描述】：
我大约 6 周前开始学习 python，大约 2 周前开始玩 pygame。我正在阅读一本好书（Python Crash Course），并且正在制作一个简单的游戏作为练习。
在屏幕的左侧，我有一张弓和箭的图片，可以通过按空格键上下移动和“射击”。当箭射出时，图像变为没有箭的未拉弓，因此看起来像是弓弦被松开了。
到目前为止，我已经完成了这一切。不过，我想要的是在射箭后的一定时间内重新加载弓。所以玩家按下空格键，箭被射出，然后大约一秒钟后弓被重新加载，玩家可以再次射击。
特别是，在调用 fire_bow() 方法后，我希望在 2 秒后将 bow_drawn 标志设置回 True。
有人知道我该怎么做吗？我已经阅读了文档，但我似乎找不到任何可以给我想要的效果的东西。特别是我不想暂停程序。理想情况下，我正在想象一种方法，即“等待 1 秒”。
这是我目前的代码，如果有用的话。
import sys
import pygame
from target_practise_settings import Settings
from bow_and_arrow import Bow
class TargetPractise:
""" Overall class to manage game assets and behaviour. """
def __init__(self):
""" Overall class to manage game assets and behavior. """
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
self.screen_width = self.screen.get_rect().width
self.screen_height = self.screen.get_rect().height
pygame.display.set_caption("Target Practise")
self.bow = Bow(self)
def run_game(self):
""" Start the main loop for the game. """
while True:
# Watch for keyboard and mouse events.
self._check_events()
self.bow.update()
self._update_screen()
def _check_events(self):
""" Respond to keypresses and mouse events. """
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
def _check_keydown_events(self, event):
""" Respond to keypresses """
if event.key == pygame.K_UP:
self.bow.moving_up = True
elif event.key == pygame.K_DOWN:
self.bow.moving_down = True
elif event.key == pygame.K_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self.bow.fire_bow()
def _check_keyup_events(self, event):
""" Respond to key releases """
if event.key == pygame.K_UP:
self.bow.moving_up = False
if event.key == pygame.K_DOWN:
self.bow.moving_down = False
def _update_screen(self):
""" Update images on the screen, and flip to the new screen. """
# Redraw the screen during each pass through the loop.
self.screen.fill(self.settings.bg_colour)
self.bow.blitme()
# Make the most recently drawn screen visible.
pygame.display.flip()
if __name__ == '__main__':
# Make a game instance, and run the game.
tp = TargetPractise()
tp.run_game()
还有弓类。
import pygame
class Bow:
""" A class to manage the bow. """
def __init__(self, tp_game):
""" Initialise the bow and its starting position """
self.screen = tp_game.screen
self.settings = tp_game.settings
self.screen_rect = tp_game.screen.get_rect()
# Load the bow and arrow image
self.bow_arrow_image = pygame.image.load(
'images/FINAL/bow_and_arrow_rotcrop_resize.bmp')
# Load the bow (no arrow) image and get its rect
self.bow_image = pygame.image.load(
'images/FINAL/bow_no_arrow_rotcrop_resize.bmp')
self.rect = self.bow_arrow_image.get_rect()
# Start each new bow at the centre right of the screen
self.rect.midleft = self.screen_rect.midleft
# Store a decimal value for the ship's vertical position
self.y = float(self.rect.y)
# Movement flags
self.moving_up = False
self.moving_down = False
# Bow drawn flag
self.bow_drawn = True
def fire_bow(self):
self.bow_drawn = False
def update(self):
""" Update the bow's position based on the movement flags. """
# Update the bow's y value, not the rect
if self.moving_up:
self.y -= self.settings.bow_speed
if self.moving_down:
self.y += self.settings.bow_speed
# Update rect object from self.y
self.rect.y = self.y
def blitme(self):
"""
Draw the bow at its current location.
Bow will be drawn depending on the bow_drawn flag
"""
if self.bow_drawn:
self.screen.blit(self.bow_arrow_image, self.rect)
elif not self.bow_drawn:
self.screen.blit(self.bow_image, (self.rect.x + 75, self.rect.y))
最后是设置。
class Settings:
""" A class to store all settings for Target Practise """
def __init__(self):
""" Initialise the game's settings. """
# Screen Settings
self.screen_width = 1200
self.screen_height = 800
self.bg_colour = (255, 255, 255)
# Bow Settings
self.bow_speed = 1
非常感谢您阅读本文！
【问题讨论】：
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sleep 2?............
标签： python python-3.x pygame