框架内SwiftUI预览异常求助（Rosetta模式下）

问题背景 #

在模块化应用的UI.xcodeproject框架中运行SwiftUIView预览时触发错误，但主目标内的ContentView、GradientView预览正常：

• 涉及Xcode版本：14.0/14.1
• 触发条件：开启Rosetta模式（因第三方依赖必须保留）
• 已尝试无效操作：重建项目、清理Derived Data、修改Build for Active Architecture选项
• 错误核心：预览代理尝试加载x86_64架构的SwiftUIView.1.preview-thunk.dylib，但实际需要arm64架构

错误日志 #

PotentialCrashError: Update failed

XCPreviewAgent may have crashed. Check ~/Library/Logs/DiagnosticReports for any crash logs from your application.

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RemoteHumanReadableError

LoadingError: failed to load library at path "/Users/yevgeniy/Library/Developer/Xcode/DerivedData/Hackathon-abjguuvpzyisdncwvpeguazdifiu/Build/Intermediates.noindex/Previews/Hackathon/Intermediates.noindex/UI.build/Debug-iphonesimulator/UI.build/Objects-normal/x86_64/SwiftUIView.1.preview-thunk.dylib": Optional(dlopen(/Users/yevgeniy/Library/Developer/Xcode/DerivedData/Hackathon-abjguuvpzyisdncwvpeguazdifiu/Build/Intermediates.noindex/Previews/Hackathon/Intermediates.noindex/UI.build/Debug-iphonesimulator/UI.build/Objects-normal/x86_64/SwiftUIView.1.preview-thunk.dylib, 0x0002): tried: '/Users/yevgeniy/Library/Developer/Xcode/DerivedData/Hackathon-abjguuvpzyisdncwvpeguazdifiu/Build/Intermediates.noindex/Previews/Hackathon/Products/Debug-iphonesimulator/SwiftUIView.1.preview-thunk.dylib' (errno=2), '/Applications/Xcode_14.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/Users/yevgeniy/Library/Developer/Xcode/DerivedData/Hackathon-abjguuvpzyisdncwvpeguazdifiu/Build/Intermediates.noindex/Previews/Hackathon/Intermediates.noindex/UI.build/Debug-iphonesimulator/UI.build/Objects-normal/x86_64/SwiftUIView.1.preview-thunk.dylib' (errno=2), '/Users/yevgeniy/Library/Developer/Xcode/DerivedData/Hackathon-abjguuvpzyisdncwvpeguazdifiu/Build/Intermediates.noindex/Previews/Hackathon/Intermediates.noindex/UI.build/Debug-iphonesimulator/UI.build/Objects-normal/x86_64/SwiftUIView.1.preview-thunk.dylib' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64')))

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解决方案 #

方案1：调整UI框架的排除架构设置 #

• 选中UI.xcodeproject框架目标，进入Build Settings
• 搜索Excluded Architectures，展开Debug-iphonesimulator配置
• 添加x86_64到排除列表，强制框架为arm64架构编译预览产物
• 清理Derived Data后重新尝试预览

方案2：显式设置框架的有效架构 #

• 在Build Settings中，点击左上角+号，选择Add User-Defined Setting
• 创建VALID_ARCHS设置，针对Debug-iphonesimulator配置，填入arm64
• 确保Build Active Architecture Only在Debug配置下设置为YES
• 重启Xcode并重新构建预览

方案3：修改框架Scheme的运行架构 #

• 打开UI框架的Scheme（Product > Scheme > Edit Scheme）
• 切换到Run标签页的Info选项卡
• 将Architecture设置为arm64，而非Standard Architectures
• 保存Scheme后重新尝试预览

内容的提问来源于stack exchange，提问作者Eugene P