Add OC category templates to Xcode 6，pls modify PROJECT_TEMPLATES_PATH and FILE_TEMPLATES_PATH as your need.
``sh
SAVEIFS=$IFS IFS=$(echo -en "\n\b")
PROJECT_TEMPLATES_PATH="/Applications/Xcode6.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/Project Templates/iOS/Application" FILE_TEMPLATES_PATH="/Applications/Xcode6.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/File Templates/Source"
EMPTY_APPLICATION_PATH="$PWD/Empty Application.xctemplate"
OC_CATEGORY_PATH="$PWD/Objective-C category.xctemplate" OC_PROTOCOL_PATH="$PWD/Objective-C protocol.xctemplate" OC_EXTENSION_PATH="$PWD/Objective-C class extension.xctemplate"
cp -R $EMPTY_APPLICATION_PATH $PROJECT_TEMPLATES_PATH
cp -R $OC_CATEGORY_PATH $FILE_TEMPLATES_PATH cp -R $OC_PROTOCOL_PATH $FILE_TEMPLATES_PATH cp -R $OC_EXTENSION_PATH $FILE_TEMPLATES_PATH
IFS=$SAVEIFS