存储项目的大部分函数

game_functions.py

@@ -0,0 +1,19 @@
+import sys
+import pygame
+from bullet import *
+from alien import *
+from time import sleep
+def check_keydown_events(event, ai_settings, screen, ship, bullets):
+    """响应按键"""
+    if event.key == pygame.K_RIGHT:
+        ship.moving_right = True
+    elif event.key == pygame.K_LEFT:
+        ship.moving_left = True
+    elif event.key == pygame.K_UP:
+        ship.moving_up = True
+    elif event.key == pygame.K_DOWN:
+        ship.moving_down = True
+    elif event.key == pygame.K_SPACE:
+        fire_bullet(ai_settings, screen, ship, bullets)
+    elif event.key == pygame.K_q:
+        sys.exit()