修复开始时立即结束的bug

src/modules/GameController.ts

@@ -49,6 +49,7 @@ class GameController
     {
         const horizontal = ["ArrowLeft", "Left", "ArrowRight", "Right"];
         const vertical = ["ArrowUp", "Up", "ArrowDown", "Down"];
+        const beginBan = ["ArrowUp", "Up", "ArrowLeft", "Left"];
 
         // 防止水平调头
         if (horizontal.includes(this.lastKeyDown) && horizontal.includes(event.key)) {
@@ -60,6 +61,11 @@ class GameController
             return;
         }
 
+        // 防止游戏开始即结束
+        if (this.snake.nowDirection === "" && beginBan.includes(event.key)) {
+            return;
+        }
+
         // 设置当前蛇的行走方向
         this.snake.nowDirection = event.key;
         // 记录此次键盘操作

src/modules/Snake.ts

@@ -78,6 +78,14 @@ class Snake
         this.direction = value;
     }
 
+    /**
+     * 返回蛇的行走方向
+     */
+    get nowDirection() : string
+    {
+        return this.direction
+    }
+
     /**
      * 获取蛇的身体
      */