遇到了这个问题：
ld: file not found: /Users/air/Library/Developer/Xcode/DerivedData/hhlc-dfscappaygvbougtbsnksvyvfufo/Build/Products/Debug-iphoneos/hhlc.app/hhlc clang: error: linker command failed with exit code 1 (use -v to see invocation)
如图所示：
貌似之前遇到过……
解决办法寻找中…………
原文：http://www.cnblogs.com/jaxer/p/4915353.html