749 lines
25 KiB
Markdown
749 lines
25 KiB
Markdown
---
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front: https://nie.res.netease.com/r/pic/20210730/ee109f39-8987-46e0-9fe7-40ebb23060fa.png
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hard: 进阶
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time: 60分钟
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---
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# 给NPC添加对应的交易表
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现在，我们的NPC已经有了基本的行为，并且会在自己的区域内等待玩家的光临，接下来我们需要给NPC赋予“灵魂”，使其成为一个真正的商人，可以兑换各式各样的物品，实现的方法也有很多种，本篇我们将介绍两种实现的方法，你可以选择更适合自己或者更适合地图的一种。
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<iframe src="https://cc.163.com/act/m/daily/iframeplayer/?id=6152b9cfb8a81f8fa07dc89f" height="600" width="800" allow="fullscreen" />
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## 使用Add-on添加交易表组件
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第一种方法比较简单，直接在生物的行为文件中添加如下组件即可
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```json
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"minecraft:economy_trade_table": { //让NPC有交易表
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"display_name": "entity.villager.anmial_shop", //交易表上显示的内容
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"table": "trading/custom/animal_shop.json", //交易表的路径位置
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"new_screen": true //是否使用新版的交易界面
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}
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```
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然后根据写下的路径位置"trading/custom/animal_shop.json"，新建交易表，交易表的路径和名称必须一致，否则是无效的。由于我们目前还没有添加交易的物品，如作物种子、家具等，所以我们先随便添加一条交易来进行演示。
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```json
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{
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"tiers": [
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{
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"groups": [ //组
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{
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"num_to_select": 1, //从下方列表中选择1条出现在交易表中
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"trades": [
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{
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"wants": [ //交易所需
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{
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"item": "minecraft:gold_ingot", //物品名称（金锭）
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"quantity": 1 //数量
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}
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],
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"gives": [ //交易所得
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{
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"item": "minecraft:spawn_egg:10", //物品名称（刷怪蛋：鸡）
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"quantity": 1 //数量
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}
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]
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}
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]
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}
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]
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}
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]
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}
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```
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完成以上内容后，接下来进入到游戏右键NPC：
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可以看到，打开交易表后上面有一串名字，这里就对应行为组件里的**"display_name"**，我们可以对其直接进行修改：
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```json
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"minecraft:economy_trade_table": {
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"display_name": "交易表", //直接对其修改
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"table": "trading/custom/animal_shop.json",
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"new_screen": true
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}
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```
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## 使用界面编辑器制作交易表的UI
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我们这次地图的交易货币并不是存放在背包的，而是用数据存储，没有实体，所以就不能采用第一种Add-on的方式；所以为了实现NPC的交易功能，必须使用UI制作可交互的界面，所以我们将使用界面编辑器制作一个简易的合成表界面；
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新建一个新的UI，并尽量输入一个比较独特且有意义的名字，这样在后续使用的时候更容易调试，也不易冲突；
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新建一个UI后，左上可以看到控件结构，我们添加的所有UI控件都将在这里，点击某一控件可以在右侧的属性中进行修改调整；每次创建新的UI界面，都会有一个名为**main**的主画布，一般为默认就好（建议除主画布main外，把所有的UI空间都改为有意义且容易辨识的名称）
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接下来在主画布下添加一个**面板控件**，将尺寸设置为合成表合适的大小，再添加**图片控件**，大小跟随上一个面板控件并添加贴图背景；
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随后依次添加多个**图片控件**，用来当作滚动列表、关闭按钮、购买按钮以及商品信息的背景并调整到合适的大小和贴图以使UI更加美观；如果在添加UI控件时出现这种层级顺序错误的情况，可以将上方**自动设定层级**选项关闭，再逐一调整控件的层级即可。
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铺好所有背景后，依次添加需要的控件，每个控件要放到相应的背景下。
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点击滚动列表控件，可以在属性中看到**内容**，这里指的是滚动列表里应该放些什么，合成表需要有很多的商品，所以这里需要添加一排按钮用来选择商品，我们添加新的画布用来存储按钮模板。
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为了能让按钮一个个的排列，我们还需要单独创建一个网格，把按钮放进网格里并设置需要的数量。
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最后将网格添加到滚动列表里，就获得一个完整的合成表UI了！
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## 使用MODSDK实现交易功能
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1. 新建一个py文件，导入ScreenNode类，新增Main类并继承ScreenNode
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2. 在ClietnSystem（客户端）的**UiInitFinished**事件中初始化UI
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3. 在ServerSystem（服务端）中利用**PlayerAttackEntityEvent**事件，获得特定NPC和玩家的id
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4. 设定玩家在点击此NPC时传达创建合成表UI的事件给客户端。
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```python
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class FarmClientSystem(ClientSystem):
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def __init__(self, namespace, systemName):
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super(FarmClientSystem, self).__init__(namespace, systemName)
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namespace = clientApi.GetEngineNamespace()
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system_name = clientApi.GetEngineSystemName()
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self.ListenForEvent(namespace, system_name,
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'UiInitFinished', self, self.ui_init)
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self.ListenForEvent("FarmMod", "ServerSystem", "create_shop_ui",
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self, self.Create_Shop_UI)
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def Create_Shop_UI(self,event):
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self.ui = clientApi.PushScreen("Farm","new_shop")
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def ui_init(self,args):
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clientApi.RegisterUI("Farm","new_shop","Script_NeteaseModw7ijjGNn.uiscreen.FarmUIScreen","new_shop.main")
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```
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```python
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class FarmServerSystem(ServerSystem):
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def __init__(self, namespace, systemName):
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ServerSystem.__init__(self, namespace, systemName)
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self.ListenForEvent("FarmMod", "ClientSystem", "buy_item",
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self,self.PlayerBuyItem)
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self.ListenForEvent(serverApi.GetEngineNamespace(), serverApi.GetEngineSystemName(), "PlayerAttackEntityEvent",
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self,self.PlayerAttack)
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def PlayerAttack(self,args):
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print "攻击了"
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entityid = args["victimId"]
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self.playername = args["playerId"]
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if entityid == "-120259084268":
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self.NotifyToClient(self.playername,"create_shop_ui", args)
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```
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```python
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class FarmUIScreen(ScreenNode):
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def __init__(self, namespace, name, param):
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ScreenNode.__init__(self, namespace, name, param)
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```
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接下来我们点击编辑器的**开发测试**进入游戏，点击对应id的NPC即可打开合成表UI，不过此时还不能对UI进行任何交互，接下来我们简单修改ui文件并绑定py函数实现一系列功能。
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在ui文件的关闭按钮控件下修改 **"$pressed_button_name"** ，这样在py中给函数添加绑定的装饰器可以直接响应按钮的交互，在函数内添加关闭UI的接口。
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> 需要删除ui文件按钮内的 "button_mappings" : []
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```json
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"close_button@common.button" : {
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"$control_alpha" : 1.0,
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"$default_texture" : "textures/ui/close_button_default",
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"$hover_texture" : "textures/ui/close_button_default_light",
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"$is_new_nine_slice" : false,
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"$label_color" : [ 1, 1, 1 ],
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"$label_font_scale_factor" : 1.0,
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"$label_font_size" : "large",
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"$label_layer" : 3,
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"$label_offset" : [ 0, 0 ],
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"$label_text" : "",
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"$nine_slice_buttom" : 0,
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"$nine_slice_left" : 0,
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"$nine_slice_right" : 0,
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"$nine_slice_top" : 0,
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"$nineslice_size" : [ 0, 0, 0, 0 ],
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"$pressed_button_name" : "%uiscreen.clicked_close_button", //修改按下的按钮的名称
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"$pressed_texture" : "textures/ui/close_button_default_light",
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"$texture_layer" : 2,
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"alpha" : 1.0,
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"anchor_from" : "center",
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"anchor_to" : "center",
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"bindings" : [
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{
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"binding_collection_name" : "",
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"binding_condition" : "always_when_visible",
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"binding_type" : "collection_details"
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}
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],
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"clip_offset" : [ 0, 0 ],
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"clips_children" : false,
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"controls" : [
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{
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"default@new_shop.default" : {}
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},
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{
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"hover@new_shop.hover" : {}
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},
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{
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"pressed@new_shop.pressed" : {}
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}
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],
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"draggable" : "not_draggable",
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"enabled" : true,
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"is_handle_button_move_event" : true,
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"layer" : 1,
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"max_size" : [ 0, 0 ],
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"min_size" : [ 0, 0 ],
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"offset" : [ 0, 0 ],
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"propagate_alpha" : false,
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"size" : [ "100.0%+0.0px", "100.0%+0.0px" ],
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"visible" : true
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},
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```
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```python
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#关闭按钮的绑定函数,按钮按下再松开后触发
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@ViewBinder.binding(ViewBinder.BF_ButtonClickUp)
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def clicked_close_button(self,args):
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print "按关闭了！"
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clientApi.PopScreen()
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```
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然后我们需要绑定滚动列表按钮的**button_label**，也就是对按钮上的文字进行修改，并且点击按钮后会在商品信息处显示对应信息：
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1. 创建一个列表变量，在里面添加文字和描述
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2. ui文件的button_label中添加集合绑定数组，用装饰器绑定函数修改按钮文字
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3. 利用导入的模块截取按下按钮的具体index
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4. 给玩家点击的按钮返回对应的描述
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首先创建一个列表变量，在里面添加多个按钮上需要显示的文字和描述，因为目前还没有添加作物和种子，就先随便写一些东西用作测试：
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```python
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# coding=utf-8
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self.item_button_text = [
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{
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"itemtext": "点击选择：小麦", # 商品的名称，显示在按钮上
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"information": "品种：小麦\n生长周期：3\n价格：5", # 商品的详细信息，展示在UI右侧
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},
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{
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"itemtext": "点击选择：茼蒿",
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"information": "品种：茼蒿\n生长周期：3\n价格：10"
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},
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{
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"itemtext": "点击选择：玉米",
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"information": "品种：玉米\n生长周期：3\n价格：15"
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},
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{
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"itemtext": "点击选择：小麦",
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"information": "品种：小麦\n生长周期：3\n价格：5"
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},
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{
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"itemtext": "点击选择：小麦",
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"information": "品种：小麦\n生长周期：3\n价格：5"
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},
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{
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"itemtext": "点击选择：小麦",
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"information": "品种：小麦\n生长周期：3\n价格：5"
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},
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{
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"itemtext": "点击选择：小麦",
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"information": "品种：小麦\n生长周期：3\n价格：5"
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},
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{
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"itemtext": "点击选择：苹果",
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"information": "品种：苹果\n生长周期：3\n价格：25"
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}
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]
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```
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在button_label控件也就是按钮上的文字，添加一个绑定，并且给绑定函数返回的值赋予在“text”上，这样就可以实现获取集合中按钮的index值并返回文字，同时还要在按钮的控件下添加集合的变量名称：
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```json
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"button_label" : {
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"alpha" : "$control_alpha",
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"color" : "$label_color",
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"font_scale_factor" : "$label_font_scale_factor",
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"font_size" : "$label_font_size",
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"font_type" : "smooth",
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"layer" : "$label_layer",
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"max_size" : [ "100%", "100%" ],
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"offset" : "$label_offset",
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"shadow" : false,
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"text" : "#text",
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"text_alignment" : "center",
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"type" : "label",
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"bindings" : [
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{
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"binding_collection_name" : "$shop_grid_collection_name", //绑定的集合变量名
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"binding_name":"#item_button_text", //绑定名称，用在装饰器上
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"binding_name_override":"#text", //对应上面的#text
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"binding_condition" : "visible", //绑定条件：显示
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"binding_type" : "collection" //绑定类型：集合
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}
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]
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},
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```
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```json
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"button@common.button" : {
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"$control_alpha" : 1.0,
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"$default_texture" : "textures/ui/pocket_button_default",
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"$hover_texture" : "textures/ui/pocket_button_hover",
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"$is_new_nine_slice" : false,
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"$label_color" : [ 1, 1, 1 ],
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"$label_font_scale_factor" : 1.0,
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"$label_font_size" : "large",
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"$label_layer" : 3,
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"$label_offset" : [ 0, 0 ],
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"$label_text" : "",
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"$nine_slice_buttom" : 0,
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"$nine_slice_left" : 0,
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"$nine_slice_right" : 0,
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"$nine_slice_top" : 0,
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"$nineslice_size" : [ 0, 0, 0, 0 ],
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"$shop_grid_collection_name" : "shop_grid", //集合变量的名称
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"$pressed_button_name" : "%uiscreen.clicked_item_button",
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"$pressed_texture" : "textures/ui/pocket_button_pressed",
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"$texture_layer" : 2,
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"alpha" : 1.0,
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"anchor_from" : "center",
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"anchor_to" : "center",
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"bindings" : [
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{
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"binding_collection_name" : "",
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"binding_condition" : "always_when_visible",
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"binding_type" : "collection_details"
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}
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],
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"clip_offset" : [ 0, 0 ],
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"clips_children" : false,
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"controls" : [
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{
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"default@new_shop.default" : {}
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},
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{
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"hover@new_shop.hover" : {}
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},
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{
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"pressed@new_shop.pressed" : {}
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},
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{
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"button_label@new_shop.button_label" : {}
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}
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],
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"draggable" : "not_draggable",
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"enabled" : true,
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"is_handle_button_move_event" : true,
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"layer" : 1,
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"max_size" : [ 0, 0 ],
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"min_size" : [ 0, 0 ],
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"offset" : [ 0, 0 ],
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"propagate_alpha" : false,
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"size" : [ "100.0%+0.0px", "100.0%+0.0px" ],
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"visible" : true
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},
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```
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```python
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#集合绑定字符串，给网格内的按钮添加对应的文字
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@ViewBinder.binding_collection(ViewBinder.BF_BindString,"shop_grid","#item_button_text")
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def binding_item_button_text(self,index):
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print index
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return self.item_button_text[index]["itemtext"] #返回此函数对应变量index的文字
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```
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导入re模块并使用**compile**函数和**findall**函数截取玩家实际点击按钮的index值，并且在ui文件中修改这个按钮控件的**"$pressed_button_name"**，使装饰器绑定这个按钮：
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```json
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"button@common.button" : {
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"$control_alpha" : 1.0,
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"$default_texture" : "textures/ui/pocket_button_default",
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"$hover_texture" : "textures/ui/pocket_button_hover",
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"$is_new_nine_slice" : false,
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"$label_color" : [ 1, 1, 1 ],
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"$label_font_scale_factor" : 1.0,
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"$label_font_size" : "large",
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"$label_layer" : 3,
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"$label_offset" : [ 0, 0 ],
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"$label_text" : "",
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"$nine_slice_buttom" : 0,
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"$nine_slice_left" : 0,
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"$nine_slice_right" : 0,
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"$nine_slice_top" : 0,
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"$nineslice_size" : [ 0, 0, 0, 0 ],
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"$shop_grid_collection_name" : "shop_grid",
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"$pressed_button_name" : "%uiscreen.clicked_item_button", //修改按下的按钮的名称
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"$pressed_texture" : "textures/ui/pocket_button_pressed",
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||
"$texture_layer" : 2,
|
||
"alpha" : 1.0,
|
||
"anchor_from" : "center",
|
||
"anchor_to" : "center",
|
||
"bindings" : [
|
||
{
|
||
"binding_collection_name" : "",
|
||
"binding_condition" : "always_when_visible",
|
||
"binding_type" : "collection_details"
|
||
}
|
||
],
|
||
"clip_offset" : [ 0, 0 ],
|
||
"clips_children" : false,
|
||
"controls" : [
|
||
{
|
||
"default@new_shop.default" : {}
|
||
},
|
||
{
|
||
"hover@new_shop.hover" : {}
|
||
},
|
||
{
|
||
"pressed@new_shop.pressed" : {}
|
||
},
|
||
{
|
||
"button_label@new_shop.button_label" : {}
|
||
}
|
||
],
|
||
"draggable" : "not_draggable",
|
||
"enabled" : true,
|
||
"is_handle_button_move_event" : true,
|
||
"layer" : 1,
|
||
"max_size" : [ 0, 0 ],
|
||
"min_size" : [ 0, 0 ],
|
||
"offset" : [ 0, 0 ],
|
||
"propagate_alpha" : false,
|
||
"size" : [ "100.0%+0.0px", "100.0%+0.0px" ],
|
||
"visible" : true
|
||
},
|
||
```
|
||
|
||
```python
|
||
#按钮的绑定函数，按下时通过re函数计算出按下的是滚动列表中的第几个按钮
|
||
@ViewBinder.binding(ViewBinder.BF_ButtonClickUp)
|
||
def clicked_item_button(self,args):
|
||
print "按下啦"
|
||
buttonpath = args["ButtonPath"].split('/')[-2] #使用导入的re模块截取按钮的index数
|
||
reg = re.compile(r'\d+')
|
||
button_index = reg.findall(buttonpath)
|
||
if button_index:
|
||
self.clicked_button_index = int(button_index[0])-1 #获取到的index数保存在此变量中
|
||
```
|
||
|
||
当玩家点击某个按钮时就会获取具体的index值，同时就可以为这个按钮添加描述；当然information对应的ui控件也需要添加绑定：
|
||
|
||
```python
|
||
#绑定字符串，给商品信息添加对应的描述
|
||
@ViewBinder.binding(ViewBinder.BF_BindString,"#shop_information")
|
||
def binding_shop_information(self):
|
||
if self.clicked_button_index == -1: #如果点击按钮的index是-1，则返回一个空字符串
|
||
return ""
|
||
return self.item_button_text[self.clicked_button_index]["information"] #返回对应index的描述信息
|
||
```
|
||
|
||
```json
|
||
"item_information" : {
|
||
"alpha" : 1.0,
|
||
"anchor_from" : "top_left",
|
||
"anchor_to" : "top_left",
|
||
"clip_offset" : [ 0, 0 ],
|
||
"clips_children" : false,
|
||
"color" : [ 1, 1, 1 ],
|
||
"enabled" : true,
|
||
"font_scale_factor" : 1.0,
|
||
"font_size" : "normal",
|
||
"font_type" : "smooth",
|
||
"layer" : 1,
|
||
"line_padding" : 0.0,
|
||
"max_size" : [ 0, 0 ],
|
||
"min_size" : [ 0, 0 ],
|
||
"offset" : [ 5, 5 ],
|
||
"propagate_alpha" : false,
|
||
"shadow" : false,
|
||
"size" : [ "75.0%+0.0px", "75.0%+0.0px" ],
|
||
"text" : "#text",
|
||
"text_alignment" : "left",
|
||
"type" : "label",
|
||
"visible" : true,
|
||
"bindings" : [
|
||
{
|
||
"binding_name":"#shop_information", //用在装饰器上绑定
|
||
"binding_name_override":"#text", //对应上面的#text
|
||
"binding_condition" : "always_when_visible" //绑定条件：总是显示
|
||
}
|
||
]
|
||
},
|
||
```
|
||
|
||
完成以上步骤后，合成表UI已经有了大致的内容：
|
||
|
||
|
||
|
||
现在，我们来添加最后也是最关键的内容，通过交易表UI进行购买；首先，通过装饰器和修改ui文件绑定购买的按钮；在绑定的函数下写相关的逻辑：
|
||
|
||
1. 如果玩家没有选择左侧的某样物品则返回
|
||
2. 获取玩家现在有的钱数并对比商品价格
|
||
3. 如果玩家的钱可以购买则继续，如果不能则返回
|
||
4. 购买成功后向服务端通信，给予玩家购买的物品
|
||
|
||
代码如下：
|
||
|
||
```python
|
||
# -*- coding: utf-8 -*-
|
||
self.item_button_text = [
|
||
{
|
||
"itemtext":"点击选择：小麦", #商品的名称，显示在按钮上
|
||
"information":"品种：小麦\n生长周期：3\n价格：5", #商品的详细信息，展示在UI右侧
|
||
"coin": 5, #购买商品的价格
|
||
"itemname":"minecraft:grass" #用于读取实际商品以给予玩家
|
||
},
|
||
{
|
||
"itemtext": "点击选择：茼蒿",
|
||
"information": "品种：茼蒿\n生长周期：3\n价格：10",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：玉米",
|
||
"information": "品种：玉米\n生长周期：3\n价格：15",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：苹果",
|
||
"information": "品种：苹果\n生长周期：3\n价格：25",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
}
|
||
]
|
||
```
|
||
|
||
先给商品的列表变量添加价格和实际商品的名称用于接下来的逻辑判断和物品发放；
|
||
|
||
```json
|
||
"buy_button@common.button" : {
|
||
"$control_alpha" : 1.0,
|
||
"$default_texture" : "textures/ui/pocket_button_default",
|
||
"$hover_texture" : "textures/ui/pocket_button_hover",
|
||
"$is_new_nine_slice" : false,
|
||
"$label_color" : [ 1, 1, 1 ],
|
||
"$label_font_scale_factor" : 1.0,
|
||
"$label_font_size" : "large",
|
||
"$label_layer" : 3,
|
||
"$label_offset" : [ 0, 0 ],
|
||
"$label_text" : "点击购买",
|
||
"$nine_slice_buttom" : 0,
|
||
"$nine_slice_left" : 0,
|
||
"$nine_slice_right" : 0,
|
||
"$nine_slice_top" : 0,
|
||
"$nineslice_size" : [ 0, 0, 0, 0 ],
|
||
"$pressed_button_name" : "%uiscreen.buy_button_clicked", //和前面的按钮一样，修改按下按钮的名称
|
||
"$pressed_texture" : "textures/ui/pocket_button_pressed",
|
||
"$texture_layer" : 2,
|
||
"alpha" : 1.0,
|
||
"anchor_from" : "center",
|
||
"anchor_to" : "center",
|
||
"bindings" : [
|
||
{
|
||
"binding_collection_name" : "",
|
||
"binding_condition" : "always_when_visible",
|
||
"binding_type" : "collection_details"
|
||
}
|
||
],
|
||
"clip_offset" : [ 0, 0 ],
|
||
"clips_children" : false,
|
||
"controls" : [
|
||
{
|
||
"default@new_shop.default" : {}
|
||
},
|
||
{
|
||
"hover@new_shop.hover" : {}
|
||
},
|
||
{
|
||
"pressed@new_shop.pressed" : {}
|
||
},
|
||
{
|
||
"buy_button_label@new_shop.buy_button_label" : {}
|
||
}
|
||
],
|
||
"draggable" : "not_draggable",
|
||
"enabled" : true,
|
||
"is_handle_button_move_event" : true,
|
||
"layer" : 1,
|
||
"max_size" : [ 0, 0 ],
|
||
"min_size" : [ 0, 0 ],
|
||
"offset" : [ 0, 0 ],
|
||
"propagate_alpha" : false,
|
||
"size" : [ "100.0%+0.0px", "100.0%+0.0px" ],
|
||
"visible" : true
|
||
},
|
||
```
|
||
|
||
修改购买按钮ui文件的**$pressed_button_name**用于在py文件中绑定；
|
||
|
||
```python
|
||
class FarmUIScreen(ScreenNode):
|
||
def __init__(self, namespace, name, param):
|
||
ScreenNode.__init__(self, namespace, name, param)
|
||
|
||
self.clientsystem = clientApi.GetSystem("FarmMod", "ClientSystem") #获取客户端实例
|
||
self.clicked_button_index = -1 #按钮的index值
|
||
self.coin = 0 #定义玩家的钱数
|
||
self.item_button_text = [
|
||
{
|
||
"itemtext":"点击选择：小麦", #商品的名称，显示在按钮上
|
||
"information":"品种：小麦\n生长周期：3\n价格：5", #商品的详细信息，展示在UI右侧
|
||
"coin": 5, #购买商品的价格
|
||
"itemname":"minecraft:grass" #用于读取实际商品以给予玩家
|
||
},
|
||
{
|
||
"itemtext": "点击选择：茼蒿",
|
||
"information": "品种：茼蒿\n生长周期：3\n价格：10",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：玉米",
|
||
"information": "品种：玉米\n生长周期：3\n价格：15",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：小麦",
|
||
"information": "品种：小麦\n生长周期：3\n价格：5",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
{
|
||
"itemtext": "点击选择：苹果",
|
||
"information": "品种：苹果\n生长周期：3\n价格：25",
|
||
"coin": 5,
|
||
"itemname": "minecraft:grass"
|
||
},
|
||
]
|
||
|
||
|
||
@ViewBinder.binding(ViewBinder.BF_ButtonClickUp)
|
||
def buy_button_clicked(self,args):
|
||
print "点击购买了"
|
||
if self.clicked_button_index == -1:
|
||
print "玩家还没选物品"
|
||
return
|
||
price = self.item_button_text[self.clicked_button_index]['coin']
|
||
print "他想买的东西价值:",price
|
||
print "你有的钱数：",self.coin
|
||
if self.coin >= price:
|
||
self.coin -= price
|
||
print "买完以后你还剩：",self.coin
|
||
#向服务端通信，将玩家id，剩余钱数，以及购买的实际物品作为参数传送过去
|
||
self.clientsystem.NotifyToServer("buy_item",{"playerid":clientApi.GetLocalPlayerId(),"coin":self.coin,"buy_item":self.item_button_text[self.clicked_button_index]["itemname"]})
|
||
else:
|
||
print "你买不起"
|
||
```
|
||
|
||
使用装饰器绑定函数，注意此时的函数名和上方ui文件的**$pressed_button_name**必须一致；获取客户端实例并在玩家购买完成后通知服务端发放物品；
|
||
|
||
```python
|
||
class FarmServerSystem(ServerSystem):
|
||
def __init__(self, namespace, systemName):
|
||
ServerSystem.__init__(self, namespace, systemName)
|
||
self.ListenForEvent("FarmMod", "ClientSystem", "buy_item",
|
||
self,self.PlayerBuyItem)
|
||
self.ListenForEvent(serverApi.GetEngineNamespace(), serverApi.GetEngineSystemName(), "PlayerAttackEntityEvent",
|
||
self,self.PlayerAttack)
|
||
|
||
|
||
def PlayerBuyItem(self, args):
|
||
print "玩家买到了"
|
||
player_id = args['playerid'] #传过来的玩家id
|
||
item_name = args['buy_item'] #传过来的实际商品名称
|
||
serverApi.GetEngineCompFactory().CreateItem(player_id).SpawnItemToPlayerInv( #发放物品
|
||
{
|
||
'newItemName': item_name,
|
||
'count': 1
|
||
},
|
||
player_id
|
||
)
|
||
```
|
||
|
||
```python
|
||
def Create_Shop_UI(self,event):
|
||
self.ui = clientApi.PushScreen("Farm","new_shop")
|
||
self.ui.coin = 100 #修改这个ui实例的硬币数量
|
||
```
|
||
|
||
在创建合成表时，先将玩家的钱数设定为100，然后进入到游戏中测试一下：
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|