更新 'ship'

ship

@@ -6,6 +6,7 @@ class Ship:
     def __init__(self, ai_game):
         """初始化飞船并设置其初始位置"""
         self.screen = ai_game.screen
+        self.settings = ai_game.settings
         self.screen_rect = ai_game.screen.get_rect()
 
         # 加载飞船图像并获取其外接矩形
@@ -15,6 +16,24 @@ class Ship:
         # 对于每艘新飞船，都将其放在屏幕底部的中央
         self.rect.midbottom = self.screen_rect.midbottom
 
+        # 在飞船的属性x中存储最小值
+        self.x = float(self.rect.x)
+
+        # 移动标志
+        self.moving_right = False
+        self.moving_left = False
+
+    def update(self):
+        """根据移动标志调整飞船的位置"""
+        # 更新飞船而不是rect对象的x值
+        if self.moving_right and  self.rect.right < self.screen_rect.right:
+            self.x += self.settings.ship_speed
+        if self.moving_left and self.rect.left > 0:
+            self.x -= self.settings.ship_speed
+
+        # 根据self.x更新rect对象
+        self.rect.x = self.x
+
     def blitme(self):
         """在指定位置绘制飞船"""
         self.screen.blit(self.image, self.rect)