# 对 evar（转化变量）进行验证

> 场景：在购物场景中，用户可以通过首页Banner、商品列表页等方式进入某个商品详情页，进而产生下单行为，想要知道不同的前序行为对于下单的贡献，就可以将商品详情页的入口来源定义为转化变量，用于分解下单行为（埋点事件）

**转化变量配置方式示例**

| 标识符               | 名称         | 描述                  | 归因              | 失效              |
| ----------------- | ---------- | ------------------- | --------------- | --------------- |
| enterSource\_evar | 商品详情页的入口来源 | 取值包括首页Banner、商品列表页等 | 根据需求选择（不涉及数据验证） | 根据需求选择（不涉及数据验证） |

**对应的代码**

此示例中的转化变量为“商品详情页的入口来源（enterSource\_evar）”，当进入详情页时设置了这个转化变量。

| 平台 | 原型 | 代码示例 |
| -- | -- | ---- |

| JS SDK | gio('evar.set', key, value);或gio('evar.set', conversionVariables); | gio('evar.set', 'enterSource\_evar', '首页Banner');或gio('evar.set', {'enterSource\_evar': '首页Banner'}); |
| ------ | ------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------- |

| Android SDK | <p>GrowingIO.getInstance().setEvar(String key, String value);</p><p>或</p><p>GrowingIO.getInstance().setEvar(JSONObject conversionVariables);</p> | <p>GrowingIO.getInstance().setEvar("enterSource\_evar", "首页Banner");</p><p>或</p><p>JSONObject jsonObject = new JSONObject();</p><p>jsonObject.put("enterSource\_evar", "首页Banner");</p><p>GrowingIO.getInstance().setEvar(jsonObject);</p> |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

| iOS SDK | <p>+ (void)setEvarWithKey:(NSString \*)key andStringValue:(NSString \*)stringValue;</p><p>或</p><p>+ (void)setEvar:(NSDictionary\<NSString \*, NSObject \*> \*)variable;</p> | <p>\[Growing setEvarWithKey:@"enterSource\_evar" andStringValue:@"首页Banner"];</p><p>或</p><p>\[Growing setEvar:@{@"enterSource\_evar":@"首页Banner"}];</p> |
| ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |

在对应的应用（网站、Android 或者 iOS App）中触发设置了转化变量的时机，通过 Debugger 工具验证数据准确性

按照如下流程图验证

![](/files/-M9qZ5IHl4htrLuujkWT)

在本例中，如下图的数据请求说明打点代码生效

![](/files/-M9qZA9K-GUxnbC-ZJrO)


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