CodeIgniter URL not found

enter code here我在我的。htaccess文件中得到了这段代码:

RewriteEngine On
RewriteBase /projFolder
### Canonicalize codeigniter URLs
# If your default controller is something other than
# "welcome" you should probably change this
RewriteRule ^(mycontrol(/index)?|index('.php)?)/?$ /  [L,R=301]
RewriteRule ^(.*)/index/?$ $1 [L,R=301]
# Removes trailing slashes (prevents SEO duplicate content issues)
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)/$ $1 [L,R=301]
# Enforce www
# If you have subdomains, you can add them to 
# the list using the "|" (OR) regex operator
RewriteCond %{HTTP_HOST} !^(www|subdomain) [NC]
RewriteRule ^(.*)$ http://www.domain.tld/$1 [L,R=301]
# Enforce NO www
#RewriteCond %{HTTP_HOST} ^www [NC]
#RewriteRule ^(.*)$ http://domain.tld/$1 [L,R=301]
###
# Removes access to the system folder by users.
# Additionally this will allow you to create a System.php controller,
# previously this would not have been possible.
# 'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]
# Checks to see if the user is attempting to access a valid file,
# such as an image or css document, if this isn't true it sends the
# request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

我的项目在/var/www/projfolder ->文件夹的结构是

/application
/system
/user_guide
.htaccess
index.php

i更改$route['default_controller'] = "mycontrol";在config routes.php文件中。如果我输入url localhost/projFolder/，它会加载默认的mycontrol.php控制器和该控制器的索引函数。如果我去localhost/projFolder/myFunction ->意味着我想从默认控制器加载myFunction，它会给我"请求的URL未在此服务器上找到"。有人能帮忙吗?谢谢。