How to get auto-suggested word based on drawn Chinese character or stroke info in the form of an array of CGPoint?

I have an array consists of the CGPoint representing the chinese character stroke paths and able to re-draw out the character on UIView. I would like to use this existing information to find out the most similar chinese word. I notice the chinese keyboard hand-writing pad can display the suggested words.

However, I have no idea which functions in the documentation that get this to work ( pass the stroke info as CGPoint, and get back suggested Chinese words). What API calls can I use to get the suggested words?

How to get auto-suggested word based on drawn Chinese character or stroke info in the form of an array of CGPoint?
 
 
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