解决OBJC_CLASS_$_MBProgressHUD无法引用的问题

最新推荐文章于 2022-10-27 14:42:56 发布
原创 最新推荐文章于 2022-10-27 14:42:56 发布 · 2w 阅读 · 1 ·
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本文解决了一个关于MBProgressHUD在项目中未正确链接的问题，主要是因为在构建阶段缺少必要的.m文件导致的符号未定义错误。

Undefined symbols for architecture i386:

  "_OBJC_CLASS_$_MBProgressHUD", referenced from:

      objc-class-ref in ViewController.o

ld: symbol(s) not found for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)



这里的错误是因为你的在building phases中没有引用相关的头文件，因此，只需要在building phase中添加对应的.m文件就可以了。
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最新发布
08-10
在iOS项目构建过程中，如果出现与Firebase Crashlytics相关的未定义符号（如 `_FIRCLSUserLoggingRecordInternalKeyValue` 或其他类似符号），通常表明构建配置或依赖项管理存在问题。以下是一些可能的原因及对应的解决方案： ### 1. Firebase SDK 版本与 Xcode 兼容性问题 某些版本的 Firebase SDK 可能与特定版本的 Xcode 不兼容，尤其是在 SDK 未完全支持某些架构（如 arm64）的情况下。检查是否使用了较旧版本的 Firebase SDK，它可能不支持当前的 iOS 架构或 Xcode 版本。尝试更新 Firebase SDK 至最新版本以确保兼容性。 ### 2. Podfile 配置问题 如果在 Podfile 中为不支持的架构（如 Mac 架构）添加了脚本阶段，可能会导致构建失败。请检查 Podfile 中的脚本阶段，并确保为不支持的架构添加了跳过逻辑。例如，如果某些脚本仅适用于非 x86_64 架构，应添加如下逻辑： ```bash if [[$ARCHS != "x86_64"]]; then # 添加特定脚本 fi ``` 确保此逻辑已正确应用[^3]。 ### 3. 构建设置中的调试符号（dSYM）生成问题 构建过程中未能正确生成调试符号（dSYM）文件可能导致符号未定义错误。检查 Xcode 的构建设置，确保启用了调试符号生成。在 Xcode 中，前往 `Build Settings`，搜索 `Debug Information Format`，并确保设置为 `DWARF with dSYM File`。 ### 4. 异常断点调试 为了更准确地定位错误，可以在 Xcode 中添加异常断点以捕获运行时错误。点击 Xcode 左边项目导航栏顶部工具栏中的倒数第二个按钮（类似标签的图标），然后点击左下角的 `+` 号，选择 `Add Exception Breakpoint...`。重新运行项目后，IDE 将帮助定位到错误的具体行[^4]。 ### 5. 检查架构支持设置 确保项目和 Podfile 中的架构支持设置一致。在 Xcode 的 `Build Settings` 中，检查 `Architectures` 设置，确保其包含所需的架构（如 arm64）。同时，在 Podfile 中确保没有排除必要的架构。 ### 6. 清理缓存并重新安装依赖 有时，构建缓存或依赖项可能损坏，导致构建失败。尝试清理 Xcode 缓存和 CocoaPods 缓存，然后重新安装依赖项。使用以下命令清理缓存： ```bash # 清理 Xcode 缓存 rm -rf ~/Library/Developer/Xcode/DerivedData # 清理 CocoaPods 缓存 pod cache clean --all ``` 之后，重新安装依赖： ```bash pod install --repo-update ``` ### 7. 更新 Xcode 和相关工具 确保使用的是最新版本的 Xcode 和相关工具。有时，旧版本的工具可能不支持某些功能或存在已知问题。更新至最新版本可能解决兼容性问题。 ### 8. 检查 Firebase Crashlytics 集成 确保 Firebase Crashlytics 已正确集成到项目中。检查 Firebase 控制台中的项目设置，确保 iOS 应用程序的包标识符与 Xcode 项目中的匹配。此外，确保已正确配置 `GoogleService-Info.plist` 文件，并将其添加到 Xcode 项目的适当目标中。 通过以上步骤，应该能够解决与 Firebase Crashlytics 相关的符号未定义错误。如果问题仍然存在，建议查看 Firebase 官方文档或社区支持，以获取更多帮助。 ---
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