飞机大战的菜鸡问题
做到在屏幕上绘制飞船开始报错
程序代码:import sys
import pygame
from settings import Setting
from ship import Ship
def run_game():
pygame.init()
pygame.display.set_caption('Alien Invasion')
ship = Ship(screen)
ai_settings = Setting()
screen = pygame.display.set_mode(
(ai_settings.screen_width, ai_settings.screen_height))
while True:#监视鼠标和键盘事件
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
screen.fill(ai_settings.bg_color)
ship.blitme()
pygame.display.flip()
run_game()
程序代码:import pygame
class Ship():
def __init__(self, screen):
self.screen = screen
self.image = pygame.image.load(
'E:/PY/044_飞机大战/飞机大战素材包/hero2.png')
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
def blitme(self):
self.screen.blit(self.image, self.rect)运行报错,在ship = Ship(screen)一行。发生异常: UnboundLocalError
local variable 'screen' referenced before assignment








