HarmonyOS 鸿蒙Next 打开预览Preview failed. Unable to start the previewer. Open PreviewerLog to check for details.
HarmonyOS 鸿蒙Next 打开预览Preview failed. Unable to start the previewer. Open PreviewerLog to check for details.
[Compile Result] ArkTS:ERROR File: D:/DevEco/Linliyizhan/entry/src/main/ets/pages/My.ets
[Compile Result] A page configured in ‘main_pages.json’ must have one and only one ‘@Entry’ decorator.
[Compile Result] Compile error occurred. Fix it based on the above message.
更多关于HarmonyOS 鸿蒙Next 打开预览Preview failed. Unable to start the previewer. Open PreviewerLog to check for details.的实战教程也可以访问 https://www.itying.com/category-93-b0.html
单从错误信息看,在My.ets里面:
首先,有一个方法返回值不是void,也不是任意类型,但它最终没有返回值:[Compile Result] A function whose declared type is neither ‘void’ nor ‘any’ must return a value;
其次,使用了两个及以上@Entry修饰符,而Page里面只允许有一个@Entry修饰符:[Compile Result] A page configured in ‘main_pages.json’ must have one and only one ‘@Entry’ decorator;
最后,build()方法内部应该有一个根容器组件:[Compile Result] There should have a root container component.
更多关于HarmonyOS 鸿蒙Next 打开预览Preview failed. Unable to start the previewer. Open PreviewerLog to check for details.的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html
从profile-main_pages.json里面把“pages/My”删除后可以预览,在router.pushUrl指向“My”会提示
03-19 11:32:00.314 E C03900/Ace: [manifest_router.cpp(GetPagePath)-(0)] [Engine Log] can't find this page pages
03-19 11:32:00.314 E C03900/Ace: [page_router_manager.cpp(StartPush)-(0)] [Engine Log] this uri not support in route push.
03-19 11:32:00.911 E C03900/Ace: [manifest_router.cpp(GetPagePath)-(0)] [Engine Log] can't find this page pages
03-19 11:32:00.911 E C03900/Ace: [page_router_manager.cpp(StartPush)-(0)] [Engine Log] this uri not support in route push。
项目名称
- 状态:已解决
- 谢谢:
在HarmonyOS鸿蒙Next中,遇到“打开预览Preview failed. Unable to start the previewer. Open PreviewerLog to check for details.”错误时,通常与预览器的启动问题有关。您可以按照以下步骤进行排查:
-
检查日志文件:根据提示,打开PreviewerLog查看详细错误信息。日志文件通常位于项目的
/build/logs
目录下,或通过IDE的日志查看器访问。 -
检查项目配置:确保项目的
config.json
文件配置正确,特别是与预览相关的设备类型、分辨率等设置。 -
检查依赖项:确认所有依赖项已正确安装,特别是与预览器相关的SDK和工具包。
-
检查IDE版本:确保使用的DevEco Studio或其他开发工具是最新版本,旧版本可能存在兼容性问题。
-
检查系统资源:预览器启动可能因内存或CPU资源不足而失败,确保系统资源充足。
-
检查网络连接:某些预览功能可能需要网络连接,确保网络畅通。
-
重启IDE和设备:尝试重启开发工具和设备,排除临时性问题。
若以上步骤无法解决问题,建议进一步分析日志文件中的具体错误信息以定位根本原因。