According to the accepted answer to this SO question, the correct, Apple-approved way to set the subject of an email through the activityviewcontroller is to use the following method:
activityViewController:subjectForActivityType:
Can anyone provide an example of how to use this?
For example, how would I set the subject for an activity view controller named AVC.
UIActivityViewController *avc = [[UIActivityViewController alloc] initWithActivityItems: activityItems applicationActivities:nil];
NSString *subject = @"Check this out";