问题
I don't know why I get this, when I build a iPad project in xcode4.6. iOS sdk 6.1, simulator 6.1.
/Applications/Xcode4.6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:92:10: 'CoreFoundation/CFUserNotification.h' file not found
In file included from /Applications/Xcode4.6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:5:10
来源：https://stackoverflow.com/questions/22830156/xcode-corefoundation-cfusernotification-h-file-not-found