UITableView with Search Bar Issue

I have a UITableView that has a Search Bar. Everything works fine but when I sc开发者_如何学JAVAroll to the bottom of the table I can still scroll up and it hides the search bar as well as duplicates the cells (as if I am scrolling through them twice).

How do I fix this?

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You placed the searchbar in tableview header.

Place it above the table