How to post the tweet in twitter from our application?

I am developing one application. In that I want to post a tweet on 开发者_如何学Gotwitter.

I am already posting a tweet by using twitter agent, but that tweet was not updated.

Please guide me how to post the tweet from our application.

I recommend to use MGTwitterEngine or SAOauthTwitterengine. Get sample code here and got to work.

[self.twitterEngine sendUpdate:yourtexttopost];

Use Twitter API and some wrappers for iOS

MGTwitterEngine

Twitter API Wiki

Wait for iOS 5.0 and use the built in twitter support.

(twitter support isn't under NDA it was in the keynote)