How to set which control displays top when they overlap?

I have a UIView and a toolbar. I want the toolbar to always stay on top when they overlap. Is t开发者_StackOverflow社区here a property, like z-index in html stylesheet, for iphone controls?

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You can call bringSubviewToFront for the control you want to be on the top.

[somesuperview bringSubviewToFront:yourtoolbar];