el-get-install安装auto-complete
emacsConfig/auto-complete-setting.el
;这个是设置一个字母就自动完成的
(setq ac-auto-start )
(setq ac-auto-show-menu 0.05)
(setq auto-complete-mode t) (setq ac-quick-help-prefer-pos-tip t)
(setq ac-use-quick-help t)
(setq ac-quick-help-delay 0.5) ;这行不能缺，否则会出现ac-dictionary-directories的错误
(require 'auto-complete-config)
(add-to-list 'ac-dictionary-directories "~/.emacs.d/ac-dict")
(ac-config-default) ;alt+/补全
(global-set-key (kbd "<M-/>") 'auto-complete)