iphones inbuilt mail composer

Hello everyone i am new to i phone development i have a requirement that my email us field is coming from webservice on tapping it the iphones email composer gets open if i want to add a button开发者_JS百科 on iphones in built mail composer i could i do that please guide me to do that a sample code would be a boost

MFMailComposeViewController is a view controller so you can add views to the view it controls.

UIButton extraButton = [UIButton ...];
[mailComposer.view addSubview:extraButton];

To make it look good may be a little more difficult.