由于我为新的 iOS 5.0 更新了 XCode,我在 MailComposer 函数中收到了警告。
MFMailComposeViewController *pickerZap = [[MFMailComposeViewController alloc] init];
pickerZap.mailComposeDelegate = self;
// warning: Assigning to 'id<MFMailComposeViewControllerDelegate>'
// from incompatible type 'Infocontroller *'
MFMailComposeViewControllerDelegate 发生了什么?我究竟做错了什么?