1、升级Xcode到Version 10.0 (10A255)后,运行已有项目,报如下错误: error: Multiple commands produce '/Users/galahad/Library/Developer/Xcode/DerivedData/yoowei-drnrntneloepunakcqbcdycudqeh/Build/Products/Debug-iphoneos/yoowei.app': 1) Target 'yoowei' has create directory command with output '/Users/galahad/Library/Developer/Xcode/DerivedData/yoowei-drnrntneloepunakcqbcdycudqeh/Build/Products/Debug-iphoneos/yoowei.app' 2) That command depends on command in Target 'yoowei': script phase “[CP] Copy Pods Resources”
原因:Xcode 10 默认使用的build system是New build system,与Xcode9不同导致。 解决:2种方法 1)第一种方法 不修改build system 根据error 日志,script phase “[CP] Copy Pods Resources”,而且与 error: Cycle in dependencies between targets 'yooweiExtension' and 'yoowei'; building could produce unreliable results. Cycle path: yooweiExtension → yoowei → yooweiExtension Cycle details: → Target 'yooweiExtension': CodeSign /Users/galahad/Library/Developer/Xcode/DerivedData/yoowei-drnrntneloepunakcqbcdycudqeh/Build/Products/Debug-iphoneos/yooweiExtension.appex ○ Target 'yooweiExtension': ProcessProductPackaging /Users/galahad/Library/Developer/Xcode/DerivedData/yoowei-drnrntneloepunakcqbcdycudqeh/Build/Intermediates.noindex/yoowei.build/Debug-iphoneos/yooweiExtension.build/yooweiExtension.appex.xcent ○ Target 'yooweiExtension' has target dependency on Target 'yoowei' → Target 'yoowei' has target dependency on Target 'yooweiExtension' ○ That command depends on command in Target 'yooweiExtension': script phase “[CP] Check Pods Manifest.lock” 对应的解决方案:选中项目target -> Build phase -> Target Dependencies 去掉相互的依赖即可
2)第二种方法 修改build system (个人感觉这种方式较好,不会每个项目搞一遍)
2、典型问题 ld: library not found for -lstdc++.6.0.9 clang: error: linker command failed with exit code 1 (use -v to see invocation) 解决方案:(我一般升级xcode 之前都会将lib 给备份一份。具体路径是:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib ) 1、提前在xcode 9中 根据路径 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib 找到 libstdc++.6.0.9.tbd 备份 2、复制刚才的libstdc++.6.0.9.tbd 文件,手动添加到 升级后的xcode 10 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib 文件夹中,运行即可。 需要的话,可以找我要。
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来自: 叹落花 > 《iOS异常处理与错误》