The Meaning of Life, the Universe, and Everything.
What you have to do is download i explorer
Then you open it up and of course connect your i device .
Then you find minecraft pe
click minecraft pe apps
drag you favorate texture pack(remember is not the folder is the terrain.png)
Then you got it!
When I use the iexpolerer it takes forever! And when you click something it loads something else!
Well if you don't want to use i explorer ou need to be jailbroken.
open up cydia
then find the minecraft pe
click minecraft pe.app
Then that's it
All the same except you have to be jailbroken.