How to lock keyboard to Simplified Chinese Handwriting?

I want to lock my keyboard to just simplified chinese handwriting. How do I do this?

The problem is that I am trying to create a Chinese quiz app in Xcode 6 using swift and I want the quiz-takers to write in the character to match the English word using a chinese handwriting keyboard. I do not know how to program this and other questions asked like this do not seem to yield a useful result for me.

Help would be much appreciated.