How to pack existing database in iphone DocumentDirectory instead of resourcePath

I want to pack my big database with iphone app and I don't want to copy a database from re开发者_运维知识库source path to document directory for readonly problem. It's have other way to pack database to document directory or remove database from resource path after copy.

Thanks.

---

why not put your big database in your web server.

when your application first start, to make a initialized request to this database , and download it .save it in your document directory.