http://download.csdn.net/detail/xinlingdedahai/8350631
https://developer.apple.com/library/ios/documentation/DeveloperTools/Reference/XcodeBuildSettingRef/Xcode_Build_Setting_Reference.pdf
Xcode_Build_Setting_Reference
原文：http://www.cnblogs.com/xuejinhui/p/4216713.html
