更新 '外星人设置/alien.py'

外星人设置/alien.py

@@ -18,4 +18,13 @@ class Alien(Sprite):
 
     # 如果外星人位于屏幕边缘，就返回True
     def check_edges(self):
-        screen_rect = self.screen.get_rect()
+        screen_rect = self.screen.get_rect()
+        if self.rect.right >= screen_rect,right:
+            return True
+        elif self.rect.left <= 0:
+            return True
+
+    def update(self):
+        self.x += (self.ai_settings.alien_speed_factor * self.ai_settings.fleet_direction)
+        self.rect.x = self.x
+