HarmonyOS 鸿蒙Next预览器白屏

HarmonyOS 鸿蒙Next预览器白屏

配置：
- win11
- devecostudio3.1.0.501
- sdk9

预览器日志：
- A preview error may have occurred. Switch to the Log tab to view details.

日志：
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]Lifetime: 0.000000s
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]Js-Engine: ark
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]page: pages
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]Error message: Builder is not defined
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]Cannot get SourceMap info, dump raw stack:
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]Stacktrace:
- 07-14 09:56:09.874 2816-26724 E C03900/Ace: [Engine Log]    at func_main_0 (entry

问题描述：
- 其他页面都能正常预览，只有底部tab栏不知为何突然就白屏无法预览。

问题截图：
![cke_344.png](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAoAAAAHgCAYAAAA10dzkAAAgAElEQVR42u1dCXBtVZn+89999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

更多关于HarmonyOS 鸿蒙Next预览器白屏的实战教程也可以访问 https://www.itying.com/category-93-b0.html

3 回复 
您好，预览器需要在@Entry 或 @Preview下使用，可以参考文档

[@developer.huawei.com](https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V2/previewer-0000001054328973-V2#section12597164113010)

更多关于HarmonyOS 鸿蒙Next预览器白屏的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html


| mytab前缺少注解 | builder |

针对“HarmonyOS 鸿蒙Next预览器白屏”的问题，可能的原因及解决方法如下：

  1. 软件兼容性问题：

    • 确保鸿蒙Next预览器版本与您的设备系统版本兼容。有时，预览版软件可能未完全适配所有设备，导致白屏现象。

  2. 缓存问题：

    • 尝试清除预览器的缓存和数据，然后重新启动应用。这可以解决因缓存数据错误导致的白屏问题。

  3. 应用冲突：

    • 检查是否安装了与鸿蒙Next预览器冲突的其他应用。某些应用可能会干扰预览器的正常运行，导致白屏。

  4. 系统资源不足：

    • 检查设备内存和存储空间是否充足。资源不足也可能导致应用无法正常运行，从而出现白屏现象。

  5. 软件缺陷：

    • 如果上述方法均无效，可能是预览器本身存在缺陷。此时，您可以关注鸿蒙官方的更新动态，等待修复该问题的版本发布。

如果问题依旧没法解决请联系官网客服，官网地址是 https://www.itying.com/category-93-b0.html 。在此页面上，您可以找到联系客服的入口，详细描述您的问题并寻求进一步的帮助。

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