尼玛，vim自动提示系统库方法

/usr/local/bin/ctags -R -f systags /usr/include/ /Users/apple/Desktop/myfile/test/ /System/Library/Frameworks/Kernel.framework/Versions/A/Headers/把/usr/include包含到
vim ~/.vimrc

" Configuration file for vim
filetype on
set modelines=0     " CVE-2007-2438

" Normally we use vim-extensions. If you want true vi-compatibility
" remove change the following statements
set nocompatible    " Use Vim defaults instead of 100% vi compatibility
set backspace=2     " more powerful backspacing

" Don't write backup file if vim is being called by "crontab -e"
au BufWrite /private/tmp/crontab.* set nowritebackup
" Don't write backup file if vim is being called by "chpass"
au BufWrite /private/etc/pw.* set nowritebackup
syntax on
"set tags=/Users/apple/red54apple/cas/cas/castags
set tags=/Users/apple/Desktop/myfile/test/systags
set tabstop=4
"set autoindent
set hlsearch

随便写个c的文件
在文件中control+p  control+n
就行了
是，很多人都会，尼玛，走了芥末多弯路才领悟