Iphone MFMessageController有时会崩溃

我有在我的应用程序中与联系人共享的概念，并使用MFMessageComposeViewController

-(IBAction)btnAddClicked:(id)sender {

    @try {

        selections = [[NSMutableArray alloc] init];
        for(NSIndexPath *indexPath in arSelectedRows) {
            NSMutableDictionary *searchable = [[NSMutableDictionary alloc
                                                ]init];

            [searchable setObject:[[contactsArray objectAtIndex:indexPath.row]objectForKey:@"Phone"]forKey:@"Phone"];
            [selections addObject:searchable];
        }
        if([selections count]>0)
        {
            NSString *temp1=@"";
            for(int i=0;i<[selections count];i++)
            {

                toRecepients=[[selections objectAtIndex:i]objectForKey:@"Phone"];

                temp1=[temp1 stringByAppendingString:toRecepients];
                temp1=[temp1 stringByAppendingString:@","];

            }

            temp1 = [temp1 substringToIndex:[temp1 length]-1];


            if(![MFMessageComposeViewController canSendText]) {
                UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Your device doesn't support SMS!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [warningAlert show];
                return;


            }

            NSArray *recipents = [temp1 componentsSeparatedByString:@","];

          MFMessageComposeViewController *messageController = [[MFMessageComposeViewController alloc] init];
            messageController.messageComposeDelegate = self;
            messageController.navigationBar.topItem.leftBarButtonItem.title = @"Cancel";
            [messageController setRecipients:recipents];
            [messageController setBody:self.message];

            [self presentModalViewController:messageController animated:YES];
        }

        else{
            UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Select the contacts you would like to share to" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [warningAlert show];
            return;



        }

    }

        @catch (NSException *exception) {
            if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPhone)
            {
                ErrorView *errorView=[[ErrorView alloc]initWithNibName:@"ErrorView" bundle:nil];
                if([[[UIDevice currentDevice]systemVersion]floatValue]<5.0)
                {
                    [self presentModalViewController:errorView animated:YES];
                }
                else
                {
                    [self presentViewController:errorView animated:YES completion:nil];
                }
                [errorView release];

            }
            if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad) {
                ErrorView *errorView=[[ErrorView alloc]initWithNibName:@"ErrorView~iPad" bundle:nil];
                if([[[UIDevice currentDevice]systemVersion]floatValue]<5.0)
                {
                    [self presentModalViewController:errorView animated:YES];
                }
                else
                {
                    [self presentViewController:errorView animated:YES completion:nil];
                }
                [errorView release];

            }
        }    }

    - (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult) result {
        switch (result) {
            case MessageComposeResultCancelled:
            {
                UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to send SMS!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [warningAlert show];
                break;
            }

            case MessageComposeResultFailed:
            {
                UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to send SMS!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [warningAlert show];
                break;
            }

            case MessageComposeResultSent:
            {
                NSString *messa=[NSString stringWithFormat:@"Shared to %lu contact(s)",(unsigned long)[selections count]];
                UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"Succesful" message:messa delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [warningAlert show];
                break;
            }

            default:
                break;
        }

        [self dismissViewControllerAnimated:YES completion:nil]; 
}

我已经设置了断点进行调试，但是xcode没有显示错误产生的位置

任何想法/建议都是值得欣赏的。

使僵尸对象能够找出实际崩溃的路线。 您可以通过以下步骤启用僵尸：

1.选择项目方案并选择编辑方案。
2.将出现一个窗口，现在选择诊断。
3.选中“启用僵尸对象”复选标记。

---

现在运行您的项目。

若要使用Zombie进行检查，我们无法在模拟器中为MFMessageController进行检查。因此，我也无法在设备上运行您的项目。是的，我在设备上运行了项目，但它没有显示异常点。我只是得到了该错误并停止运行。您能告诉我，我还可以应用什么来达到该错误吗([[[UIDevice currentDevice]systemVersion]floatValue]也不需要在代码中检查iPad。iOS将在iPad上自动加载

~iPad

。

Assertion failed: (result == KERN_SUCCESS), function +[XPCMachSendRight wrapSendRight:], file /SourceCache/XPCObjects/XPCObjects-46/XPCMachSendRight.m, line 27.