编译错误 compile error：
fatal error: file
'/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UITableViewCell.h' has been modified since the precompiled header was built
the answer of stackoverflow:
I had this exact same problem after applying the recent Xcode patch. I ended up deleting the DerivedData folder for my app at:
~/Library/Developer/Xcode/DerivedData/{project name + gobly-gook}
关于 this "~/Library/Developer/Xcode/DerivedData" directory
This directory contains built products and indexes for the project. It is OK to delete it because it only contains items generated by Xcode. Xcode will regenerate everything next time the project is opened.
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14.0真机调试包 安装路径:/应用程序/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/De
/应用程序/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/
### 真机运行库 在终端输入以下命令打开Xcode的lib库目录（此目录位安装的默认目录） ``` open /Applications/Xcode....open /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Develo
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/ //iOS12.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS....
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libstdc++.6.0.9.dylib ...
路径参考/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/对应版本/: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/10.3.1\ \...
Xcode10中删除了`libstdc++`库，导致老项目在Xcode10中编译失败，解决方法如下： .../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
路径参考/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/对应版本/: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/10.3.1\ \...
ideviceimagemounter -t Developer /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/10.3.1\ \(14E8301\)/DeveloperDiskImage.dmg /Applications/Xcode.app/Contents/...
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib 将libstdc++.6.0.9.dylib，libstdc++.6.dylib，libstdc++.dylib文件拷贝到以下路径： /...
For Device Put tbd copy to the path: /Applications/Xcode.app/Contents/.../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
IOS12.3 beta版真机调试包，真机运行的支持包的位置位于：Xcode.app／/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport，直接解压拷贝进去即可使用
根据调试方式不同，真机和模拟器文件放置路径不同，分别复制对应的Lib文件到以下路径.../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
IOS真机调试包 解压后放在目录：/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
Xcode10报错之libstdc++.6.0.9.tbd未找到(library not found for -.../Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib 然后重启Xcode
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/ 将dylib副本放到下面路径中： /Applications/Xcode.app/Contents/Developer/...
devzkndeMacBook-Pro:Platforms devzkn$ /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport devzkndeMacBook-Pro:Platforms devzkn$ open /Applications/Xcode8.3.3.app/...
下载好解压到这个目录： /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport 重启Xcode。就可以真机调试啦。
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk \ --target-os=darwin \ --arch=i386 \ --cpu=i386 \ --extra-cflags='-arch ...