【Window_ShopBuy】改成这样（添加的东西放到了顶格，然后draw_item方法改了）：

1. #==============================================================================
   
2. # ■ Window_ShopBuy
   
3. #------------------------------------------------------------------------------
   
4. # 　商店画面、浏览显示可以购买的商品的窗口。
   
5. #==============================================================================
   
6. # 公开背包武器防具
   
7. class Game_Party
   
8. attr_accessor  :weapons
   
9. attr_accessor  :armors
   
10. end
    
11. 
    
12. class Window_ShopBuy < Window_Selectable
    
13.   #--------------------------------------------------------------------------
    
14.   # ● 初始化对像
    
15.   #     shop_goods : 商品
    
16.   #--------------------------------------------------------------------------
    
17.   def initialize(shop_goods)
    
18.     super(0, 128, 368, 352)
    
19.     @shop_goods = shop_goods
    
20.     refresh
    
21.     self.index = 0
    
22.   end
    
23.   
    
24. # 刷新背包持有数
    
25. def reset_wea_arm_number
    
26. @wea_arm_number = 0
    
27. $game_party.weapons.each_value{|value| @wea_arm_number += value}
    
28. $game_party.armors.each_value{|value| @wea_arm_number += value}
    
29. end
    
30. 
    
31. # 不可购买的场合
    
32. def cant_buy(item)
    
33. return (item == nil || item.price > $game_party.gold) if item.is_a?(RPG::Item)
    
34. return (item == nil || item.price > $game_party.gold || @wea_arm_number >= 60) if (item.is_a?(RPG::Weapon) || item.is_a?(RPG::Armor))
    
35. end
    
36. 
    
37.   #--------------------------------------------------------------------------
    
38.   # ● 获取物品
    
39.   #--------------------------------------------------------------------------
    
40.   def item
    
41.     return @data[self.index]
    
42.   end
    
43.   #--------------------------------------------------------------------------
    
44.   # ● 刷新
    
45.   #--------------------------------------------------------------------------
    
46.   def refresh
    
47.     if self.contents != nil
    
48.       self.contents.dispose
    
49.       self.contents = nil
    
50.     end
    
51. reset_wea_arm_number
    
52.     @data = []
    
53.     for goods_item in @shop_goods
    
54.       case goods_item[0]
    
55.       when 0
    
56.         item = $data_items[goods_item[1]]
    
57.       when 1
    
58.         item = $data_weapons[goods_item[1]]
    
59.       when 2
    
60.         item = $data_armors[goods_item[1]]
    
61.       end
    
62.       if item != nil
    
63.         @data.push(item)
    
64.       end
    
65.     end
    
66.     # 如果项目数不是 0 就生成位图、描绘全部项目
    
67.     @item_max = @data.size
    
68.     if @item_max > 0
    
69.       self.contents = Bitmap.new(width - 32, row_max * 32)
    
70.       for i in 0...@item_max
    
71.         draw_item(i)
    
72.       end
    
73.     end
    
74.   end
    
75. 
    
76.   #--------------------------------------------------------------------------
    
77.   # ● 描绘项目
    
78.   #     index : 项目编号
    
79.   #--------------------------------------------------------------------------
    
80.   def draw_item(index)
    
81.     item = @data[index]
    
82.     # 获取物品所持数
    
83.     case item
    
84.     when RPG::Item
    
85.       number = $game_party.item_number(item.id)
    
86.     # 价格在所持金以下、并且所持数不是 99 的情况下为普通颜色
    
87.     # 除此之外的情况设置为无效文字色
    
88.       if item.price <= $game_party.gold and number < 99
    
89.         self.contents.font.color = normal_color
    
90.       else
    
91.         self.contents.font.color = disabled_color
    
92.       end
    
93.     when RPG::Weapon
    
94.       number = $game_party.weapon_number(item.id)
    
95.       
    
96.       if item.price <= $game_party.gold && @wea_arm_number < 60
    
97.         self.contents.font.color = normal_color
    
98.       else
    
99.         self.contents.font.color = disabled_color
    
100.       end
     
101.       
     
102.     when RPG::Armor
     
103.       number = $game_party.armor_number(item.id)
     
104.       
     
105.       if item.price <= $game_party.gold && @wea_arm_number < 60
     
106.         self.contents.font.color = normal_color
     
107.       else
     
108.         self.contents.font.color = disabled_color
     
109.       end
     
110.     end
     
111. 
     
112.     x = 4
     
113.     y = index * 32
     
114.     rect = Rect.new(x, y, self.width - 32, 32)
     
115.     self.contents.fill_rect(rect, Color.new(0, 0, 0, 0))
     
116.     bitmap = RPG::Cache.icon(item.icon_name)
     
117.     opacity = self.contents.font.color == disabled_color ? 128 : 255
     
118.     self.contents.blt(x, y + 4, bitmap, Rect.new(0, 0, 24, 24), opacity)
     
119.     self.contents.draw_text(x + 28, y, 212, 32, item.name, 0)
     
120.     self.contents.draw_text(x + 240, y, 88, 32, item.price.to_s, 2)
     
121.   end
     
122.   
     
123.   #--------------------------------------------------------------------------
     
124.   # ● 刷新帮助文本
     
125.   #--------------------------------------------------------------------------
     
126.   def update_help
     
127.     @help_window.set_text(self.item == nil ? "" : self.item.description)
     
128.   end
     
129. end
     

复制代码

然后到【Scene_Shop】里面的【update_buy】方法里面，
把按下C键的场合的第一个不能购买的分歧条件改成：

1. if @buy_window.cant_buy(@item)

复制代码

大概就可以了。