MFMailComposer 启动后立即关闭答案

【问题标题】：MFMailComposer Dismissing immediately after launchMFMailComposer 启动后立即关闭
【发布时间】：2013-11-06 22:44:15
【问题描述】：

我正在尝试在 iOS 7 模拟器上启动 MFMailComposer，一旦它出现，它就会立即自行消失，并且在调试器中出现以下错误。

_serviceViewControllerReady:error: Error Domain=NSCocoaErrorDomain Code=4097 "The     operation couldn’t be completed. (Cocoa error 4097.)"

这是我的代码

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    switch (buttonIndex) {
        case 0:
            break;
        case 1:{
            if ([MFMailComposeViewController canSendMail]) {
                MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
                mailViewController.mailComposeDelegate = self;
                [mailViewController setSubject:[NSString stringWithFormat:@"%@ Totals Report",_teamStats.relationshipTeam.teamName]];
                [mailViewController setMessageBody:@"\n\n\n\n\nSent From HoopMetrics" isHTML:NO];
                // Attach a doc to the email

                NSData* data =  [_teamStats.relationshipTeam  pdfDataFromString:_teamStats.teamTotalsAsString];
                [mailViewController addAttachmentData:data mimeType:@"application/pdf" fileName:@"Totals Report"];
                [self presentViewController:mailViewController animated:YES completion:nil];

            }
            else{
                HMAlertView*alert = [[HMAlertView alloc]initWithTitle:@"No Email" message:@"Please, set up an email account on your device" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [alert show];
            }
        }
            break;
}

【问题讨论】：

查看这个问题并回答stackoverflow.com/questions/18978864/…

标签： ios7 mfmailcomposeviewcontroller mfmailcomposer

【解决方案1】：

我遇到了同样的问题。只需关闭 UINavigationBar 或 UIBarButtonItem 或 MFMailComposeViewController 可能使用的其他元素的外观自定义。

【讨论】：

在我的情况下，它是 -[[UIBarButtonItem appearance] setBackButtonBackgroundImage:forState:barMetrics:] 造成的。其他外观自定义似乎没有问题。
就我而言，这是由于[[UITableView appearance] setSeparatorInset:UIEdgeInsetsZero]。

【解决方案2】：

您可以使用performSelector 来解决这个问题：

- (IBAction)sendEmail:(id)sender {
  [self performSelector:@selector(showEmailComposer) withObject:nil afterDelay:0.0];

}

-(void) showEmailComposer{


  MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];

  //Set recipients...other stuff
  [mailViewController setToRecipients:recipients];
  [mailViewController setSubject:subject];
  [mailViewController setMessageBody:body isHTML:isHTML];


  mailViewController.title = @"Email VC Title";


  mailViewController.mailComposeDelegate = delegate;
  [self presentViewController:mailViewController
                     animated:YES
                   completion:NULL];

}

【讨论】：