包含换行
find . "(" -name "*.m" -or -name "*.mm" -or -name "*.cpp" -or -name "*.h" -or -name "*.xib" -or -name "*.c" ")" -print | xargs wc -l
去掉换行
find . "(" -name "*.m" -or -name "*.mm" -or -name "*.cpp" -or -name "*.h" -or -name "*.xib" -or -name "*.c" ")" -print |xargs grep -v "^$"|wc -l