handy .xvimrc configurator for Xcode, see this repo: github.com/XVimProject/XVim

.xvimrc

"Author: Zoltán Bognár
"put into ~/
syntax enable
set hls
highlight Search guibg=#7D2F52
set bg=light
set tabstop=4
set softtabstop=4
set shiftwidth=4
set scrolloff=2
set formatprg=uncrustify\ -c\ ~/uncrustify.cfg\ -l\ OC\ --no-backup\ 2>/dev/null
filetype plugin on
"set mouse=a
"set paste
"set t_Co=256
"syn spell toplevel
set spell spelllang=en_us
set nospell
set listchars=tab:>-,eol:$,precedes:>,trail:_
autocmd BufEnter * lcd %:p:h
"autocmd BufLeave * setlocal nocursorline "nocursorcolumn
"autocmd BufEnter * setlocal cursorline  "cursorcolumn

"autocmd FileType python set shiftwidth=4 tabstop=4 softtabstop=4 expandtab autoindent smarttab cinwords=if,elif,else,for,while,try,except,finally,def,class         
"au FileType python source ~/.vim/ftplugin/python.vim
"set rtp=/Users/zoltanbognar/.vim,/Users/zoltanbognar/.vim/plugin,/usr/share/vim
",/usr/share/vim/addons,/usr/share/vim/vimfiles,/usr/share/vim/vimcurrent,/usr/share/vim/vimfiles/after,/usr/share/vim/addons/after,/home/zoltan/.vim/after
"-------------------------------------------------------------------------------
 "    F2   -  write file without confirmation
 "    F3   -  call file explorer Ex
 "    F4   -  show tag under curser in the preview window (tagfile must
 "exist!)
 "    F6   -  list all errors
 "    F7   -  display previous error
 "    F8   -  display next error
 "    F12  -  toggle line numbers
 "  S-Tab  -  Fast switching between buffers (see below)
 "    C-q  -  Leave the editor with Ctrl-q (see below)
 "-------------------------------------------------------------------------------
 "
map   <silent> <F2>    :write<CR>
map   <silent> <F3>    :Explore<CR>
map  <silent> <F4>      :set spell<CR>
map  <silent> <F5>      :set nospell<CR>
"nmap  <silent> <F4>    :exe ":ptag ".expand("<cword>")<CR>
map   <silent> <F6>    :copen<CR>
map   <silent> <F7>    :cp<CR>
map   <silent> <F8>    :cn<CR>
map  <silent> <F9>     :make<CR>
map  <silent> <F10>    :TlistToggle<CR>
map  <silent> <F11>    :w<CR>:make all install<CR>
"map   <silent> <F12>   :let &number=1-&number<CR>
map   <silent> <F12>   :A<CR>
"
imap  <silent> <F2>    <Esc>:write<CR>
imap  <silent> <F3>    <Esc>:Explore<CR>
imap  <silent> <F4>   <Esc>:set spell<CR>                                                                                                                                
imap  <silent> <F5>   <Esc>:set nospell<CR>
"imap  <silent> <F4>    <Esc>:exe ":ptag ".expand("<cword>")<CR>
imap  <silent> <F6>    <Esc>:copen<CR>
imap  <silent> <F7>    <Esc>:cp<CR>
imap  <silent> <F8>    <Esc>:cn<CR>
imap  <silent> <F9>    <Esc>:make<CR>
imap  <silent> <F11>   <Esc>:w<CR>:make all install<CR>
"imap  <silent> <F12>   :let &number=1-&number<CR>
imap   <silent> <F12>   :A<CR>
"
" insert mode : autocomplete brackets and braces
imap ( ()<Left>
imap [ []<Left>
imap { {}<Left>
"
" visual mode : frame a selection with brackets and braces
vmap ( d<Esc>i(<Esc>p
vmap [ d<Esc>i[<Esc>p
vmap { d<Esc>i{<Esc>p
"
"Fast switching between buffers
" The current buffer will be saved before switching to the next one.
" Choose :bprevious or :bnext
"-------------------------------------------------------------------------------
"
map  <silent> <s-tab>  <Esc>:if &modifiable && !&readonly &&
       \                  &modified <CR> :write<CR> :endif<CR>:bprevious<CR>
imap  <silent> <s-tab>  <Esc>:if &modifiable && !&readonly &&
      \                  &modified <CR> :write<CR>:endif<CR>:bprevious<CR>

"Go Back
map <C-o> :pjump<CR>
""Go Forward
map <C-i> :njump<CR>