问题
My vim setup( https://github.com/aaronjorbin/.vim ) contains set pastetoggle=<F2> yet fn+F2 (when vim is running in terminal) causes vim to enter insert mode and output a Q on it's own line (same behavior when I am already in insert mode). This is the same if I am working on my local machine or if I have sshed into another server.
In iterm2, nothing happens when I am in normal or visual mode. When I am in insert mode, <F2> is inserted.
My config works perfectly well on my mac mini and linux netbook, but this is throwing me for a loop.
回答1:
This is likely due to your TERM type being set to something other than xterm xterm-color or xterm-256color. I had mine set to linux for some reason I can't remember. This caused the function keys to send escape sequences instead of being interpreted as function key presses. ie- F2 was sending ^[OQ instead of <F2>.
If you need that terminal type you can change your .vimrc to use the key you want by pressing <ctrl-v><F2> in place of typing <F2>
The easier fix is of course to just change your terminal type to something that allows vim to work without jumping through hoops.
回答2:
You have set noesckeys in your vimrc.
I've read a long time ago (no source, sorry) something about function keys being interpreted as <Esc>number in some terminals (<Esc>9 for <F9>).
If I'm correct and if I read :help noesckeys correctly, set noesckeys is blocking all function keys. Try commenting it out.
回答3:
(Very late answer I know but someone else may find this useful)
I encountered the same problem (Vim7.4 on OSX10.9.5) and what worked for me was to set pastetoggle after setting nocompatible (nocp).
回答4:
I found that on Macs the F2 key is mapped to "Turn Do Not Disturb On/Off". You can disable this setting under System Preferences -> Keyboard -> Shortcuts -> Mission Control. Uncheck the checkbox or pick another key. Picture below
来源：https://stackoverflow.com/questions/7885198/set-pastetoggle-not-working