Iphone 如何从视图和视图控制器中删除关联？

当我发送电子邮件（使用MFMailComposeViewController）后尝试显示facebook共享时，我收到以下错误：

一个视图一次最多只能与一个视图控制器关联 时间视图[EAGLView]与[EmailViewController]关联。清楚的 将此视图与[FacebookView]关联之前，请先删除此关联

[EmailViewController从ParentViewController移除]；无所事事

EmailViewController.view=nil；导致白色屏幕，即使电子邮件表单早已消失

如何让它忘记我曾经发送过邮件和电子邮件，并使视图层次结构恢复到以前的状态？如果我没有发送电子邮件，facebook共享就可以工作

-(IBAction)ShowEmailForm:(char*)pSubject :(char*)pBody :(char*)pTo
{

    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));

    if (mailClass != nil)
    {
        if ([mailClass canSendMail])
        {
            self.view = eaglView;

            MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
            picker.mailComposeDelegate = self;

            [picker setSubject:[NSString stringWithFormat:@"%s", pSubject]];

            // Set up recipients
            if( pTo != nil )
            {
                NSArray *toRecipients = [NSArray arrayWithObject:[NSString stringWithFormat:@"%s", pTo]];
                [picker setToRecipients:toRecipients];
            }

            // Fill out the email body text
            [picker setMessageBody:[NSString stringWithFormat:@"%s",pBody] isHTML:YES];

            [self presentViewController:picker animated:YES completion:^(){}];
            [picker release];
        }
    }
}

// Dismisses the email composition interface when users tap Cancel or Send. Proceeds to update the message field with the result of the operation.
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{    
    [self dismissViewControllerAnimated:YES completion:^(){ printf("Email form done dismissing.\n"); }];

    printf("Email form dismissed.\n");

    [self removeFromParentViewController];

    //Email was sent.
    if (result == MFMailComposeResultSent)
    {
        printf("Email Sent!\n");

        NSString *pEmail = [self findEmailAddresses:controller.view : 0];

    }
}

修好了

改变

        self.view = eaglView;

到

---

首先，您是如何演示MFMailComposeViewController的？-（iAction）ShowEmailForm:（char*）psObject:（char*）pBody:（char*）pTo{Class mailClass=（NSClassFromString（@“MFMailComposeViewController”）；if（mailClass！=nil）{if（[mailClass canSendMail]）{self.view=eaglView；MFMailComposeViewController*picker=[[MFMailComposeViewController alloc]init]；picker.mailComposeDelegate=self；[picker setSubject:[NSString stringWithFormat:@“%s”，psObject]]；[self presentModalViewController:picker动画：是]；[picker release]；}}把它加到你的问题里去，否则很难读懂

        [eaglView addSubview:self.view];