A question related to UI Refresh

I have question related to what is done in SMS application is if i'm in inbox and during the reading of message 开发者_如何学运维if 1 more message opens then the latest message will be updated and then show it on top

how to do it?? can anyone give me code of it.

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If you mean the blueish overlay thing, you can implement it via Push Notifications or a UIAlertView.

If you mean the screen with the entire conversation, implement it using a UIScrollView and update when a new message comes in.