还有一件事，使用 : retab 将现有制表符转换为空格 http://vim.wikia.com/wiki/Converting_tabs_to_spaces

:set sw=4

参见掌握VI编辑器

要为当前用户永久地定义此属性，请创建(或编辑).vimrc文件:

$ vim ~/.vimrc

然后，将下面的配置粘贴到文件中。重新启动vim后，将应用选项卡设置。

set tabstop=4       " The width of a TAB is set to 4.
                    " Still it is a \t. It is just that
                    " Vim will interpret it to be having
                    " a width of 4.

set shiftwidth=4    " Indents will have a width of 4

set softtabstop=4   " Sets the number of columns for a TAB

set expandtab       " Expand TABs to spaces

将您想要的设置放在~/。vimrc文件——请参阅下面的一些指导方针和最佳实践。

在Vim中使用标签有四种主要方式:

Always keep 'tabstop' at 8, set 'softtabstop' and 'shiftwidth' to 4 (or 3 or whatever you prefer) and use 'noexpandtab'. Then Vim will use a mix of tabs and spaces, but typing and will behave like a tab appears every 4 (or 3) characters. Note: Setting 'tabstop' to any other value than 8 can make your file appear wrong in many places (e.g., when printing it). Set 'tabstop' and 'shiftwidth' to whatever you prefer and use 'expandtab'. This way you will always insert spaces. The formatting will never be messed up when 'tabstop' is changed. Set 'tabstop' and 'shiftwidth' to whatever you prefer and use a |modeline| to set these values when editing the file again. Only works when using Vim to edit the file. Always set 'tabstop' and 'shiftwidth' to the same value, and 'noexpandtab'. This should then work (for initial indents only) for any tabstop setting that people use. It might be nice to have tabs after the first non-blank inserted as spaces if you do this though. Otherwise aligned comments will be wrong when 'tabstop' ischanged.

来源:

vimdoc.sourceforge.net/htmldoc/options.html #“制表符” :帮助制表符

或者vim modeline的简写:

vim :set ts=4 sw=4 sts=4 et :

对于永久的更改，创建文件~/.vim/plugin/tab_expander。用内容进行Vim

set tabstop=4 softtabstop=4 expandtab shiftwidth=4 smarttab

防止碰~/。Vimrc，从而保持其他默认设置不变。