Xcode编译错误 SigningIdentity: "-"

CodeSign/Users/me/Library/Developer/Xcode/DerivedData/MyApp-gnoiiwnelmxzdidnijaswisrwdqe/Build/Products/Debug-iphonesimulator/MyApp.app

cd/Users/me/Desktop/MyAppFolder1/MyAppFolder2/MyAppxcodeexportCODESIGN_ALLOCATE=/Users/me/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/codesign_allocateexportPATH="/Users/me/Downloads/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Users/me/Downloads/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"

SigningIdentity: "-"

/usr/bin/codesign--force--sign---timestamp=none/Users/me/Library/Developer/Xcode/DerivedData/MyApp-gnoiiwnelmxzdidnijaswisrwdqe/Build/Products/Debug-iphonesimulator/MyApp.app/Users/me/Library/Developer/Xcode/DerivedData/MyApp-gnoiiwnelmxzdidnijaswisrwdqe/Build/Products/Debug-iphonesimulator/MyApp.app:resource fork,Finderinformation,orsimilar detritusnotallowedCommand/usr/bin/codesign failedwithexitcode1

加了几张图片之后编译就出现了类似上面的错误（以上错误提示是stackoverflow：https://stackoverflow.com/questions/39449665/xcode-8-cant-archive-command-usr-bin-codesign-failed-with-exit-code-1/40128180），搞了半天终于在这里找到了解决方法，原来是UI做图片时把一些扩展信息也保存下来了，使用以下指令清除一下扩展信息就好。

先清掉模拟器的，因为刚build过；

cd ~/Library/Developer/Xcode/DerivedData

xattr -c*

最后最好也cd到你放图片的文件夹执行一下

xattr -c*

clean一下在build就好了。