python - 船不动,python速成班第12章
问题描述
船不会移动,但不会返回错误。这真是令人沮丧。
外星人入侵.py
import sys
import pygame
from settings import Settings
from ship import Ship
import game_functions as gf
def run_game():
pygame.init()
ai_settings = Settings()
screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))
pygame.display.set_caption("Alien Invasion")
ship = Ship(ai_settings, screen)
while True:
gf.check_events(ship)
ship.update()
gf.update_screen(ai_settings, screen, ship)
pygame.display.flip()
run_game()
游戏功能.py
import sys
import pygame
def check_events(ship):
for event in pygame.event.get():
if event == pygame.QUIT:
sys.exit()
elif event == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
ship.moving_right = True
elif event.key == pygame.K_LEFT:
ship.moving_left = False
elif event == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
ship.moving_right = False
elif event.key == pygame.K_LEFT:
ship.moving_left = False
def update_screen(ai_settings, screen, ship):
screen.fill(ai_settings.bg_colour)
ship.blitme()
设置.py
class Settings():
def __init__(self):
#screen stuff
self.screen_width = 1000
self.screen_height = 750
self.bg_colour = (0, 0, 0)
self.ship_speed_factor = 1.5
船.py
import pygame
class Ship():
def __init__(self, ai_settings, screen):
self.screen = screen
self.ai_settings = ai_settings
self.image = pygame.image.load('ship.bmp')
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
self.rect.centerx = self.screen_rect.centerx
self.rect.bottom = self.screen_rect.bottom
self.moving_right = False
self.moving_left = False
self.center = float(self.rect.centerx)
def update(self):
if self.moving_right and self.rect.right < self.screen_rect.right:
self.center += self.ai_settings.ship_speed_factor
if self.moving_left and self.rect.left > 0:
self.center -= self.ai_settings.ship_speed_factor
self.rect.centerx = self.center
def blitme(self):
self.screen.blit(self.image, self.rect)
另外,这里是ship.bmp
解决方案
event
是一个对象,事件的类型存储在属性中.type
。因此,您必须评估if event.type == ...:
而不是if event == ...:
:(
请参阅pygame.event
)
def check_events(ship):
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
ship.moving_right = True
elif event.key == pygame.K_LEFT:
ship.moving_left = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
ship.moving_right = False
elif event.key == pygame.K_LEFT:
ship.moving_left = False
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