从SDK4.0开始，就可以在程序内使用MFMessageComposeViewController来发送短信了（如果设备支持的话）。
废话少说，代码如下：
self.msgCtrl = [[MFMessageComposeViewController alloc] init];
[self.msgCtrl release];
if (![MFMessageComposeViewController canSendText]) {
UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"设备不支持短信发送" message:nil delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:nil];
[av show];
[av release];
return;
}
[self.msgCtrl setBody:@"短信内容"];
[self.msgCtrl setRecipients:[self.selectedContactPhoneDict allKeys]];
!!!: self.msgCtrl.messageComposeDelegate = self;
[self presentModalViewController:self.msgCtrl animated:YES];
特别是标注了!!!的这一行，坑爹的delegate名字是messageComposeDelegate，这样才会触发下面的回调：
-(void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{
switch (result) {
case MessageComposeResultCancelled:
[[TKAlertCenter defaultCenter] postAlertWithMessage:@"已取消短信发送"];
break;
case MessageComposeResultSent:
[[TKAlertCenter defaultCenter] postAlertWithMessage:@"成功发送短信"];
break;
case MessageComposeResultFailed:
[[TKAlertCenter defaultCenter] postAlertWithMessage:@"短信发送失败"];
break;
default:
break;
}
[self dismissModalViewControllerAnimated:YES];
}
