you could tie a loop with with an over hand knot ,at the lenght you want the hair plus about 5mm,then cut a 5mm lenght of shrink tube(you can you just tubing ) then thread the loop through the tube ,then making sure the knot end will sit up near the eye,thread it over the point and up the shank of the hook, once steamed its nice and tidy,if you use shrink tube you can trap the knot inside making things even tidier.or if just tubing make sure the knot is above and cant slide through.
with this trick it makes replacing a hair on a old(sharp ) rig easy,just cut off the old hair and do as above.
you can tie on the hair but depending on the size of the eye and diametre of hook link sometimes it fiddly to poke the braid through the eye