Add default text to iOS mail composer

I have:

[mailComposer setMessageB开发者_C百科ody:[self currentText] isHTML:NO];

Where emailComposer is just the iOS email composer view. I want to add to currentText another string. How would I do this?

NSString *messageBody = [NSString stringWithFormat:@"%@%@", [self currentText], someOtherString];
[mailComposer setMessageBody:messageBody isHTML:NO];