This script changes base urls of api for debbuging on iOS devices.

gistfile1.sh

if [[ "${CONFIGURATION}" == "Debug" && "${PLATFORM_NAME}" != *simulator* ]]; then
    plist="${BUILT_PRODUCTS_DIR}/${INFOPLIST_PATH}"
    ip=$(ifconfig en0 | grep "inet[^6]" | cut -d" " -f2)

    url=$(/usr/libexec/PlistBuddy -c "Print :APIBaseURL" $plist)
    url=$(echo $url | sed "s|\(http://\)[^:/]*\(.*\)|\1$ip\2|")
    /usr/libexec/PlistBuddy -c "Set :APIBaseURL $url" $plist
fi

gistfile2.m

NSString *baseURLString = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"APIBaseURL"];
NSURL *baseURL = [NSURL URLWithString:baseURLString];