pre-action_script.sh

#to print Build settings type on terminal: xcodebuild -project MyProject.xcodeproj -target "MyTarget" -showBuildSettings

#PROJECT_DIR = /Users/daniele/Desktop/MyProjectFolder

project_content_folder="MyProject"
storyboard_file="Main.storyboard"
storyboard_file_orig="Main_orig.storyboard"
storyboard_file_backup="Main_bk.storyboard"
storyboard_dir="${PROJECT_DIR}/${project_content_folder}/Base.lproj"

from_text="red=\"1\" green=\"0.14901960784313725\" blue=\"0.0\""
to_text="red=\"0.0\" green=\"0.47843137250000001\" blue=\"1\""

echo ${storyboard_dir}
cd ${storyboard_dir}

if [ -f ${storyboard_file} ]
then
cp ${storyboard_file} ${storyboard_file_backup}
mv ${storyboard_file} ${storyboard_file_orig}
fi

sed "s/${from_text}/${to_text}/g" ${storyboard_file_orig} > ${storyboard_file}