小编Gl0*_*b1l的帖子

我目前正在使用iOS7和MFMailComposeViewController.有时(经常但不总是),我在呈现时遇到以下崩溃MFMailComposeViewController:

***断言失败 - [MFComposeSubjectView layoutSublayersOfLayer:],/ SourceCache/UIKit/UIKit-2903.23/UIView.m:8540

这是我如何呈现控制器:

if ([MFMailComposeViewController canSendMail])
    {
        MFMailComposeViewController* mailVC = [[MFMailComposeViewController alloc] initWithNibName:nil bundle:nil];
        mailVC.mailComposeDelegate = self;

        [mailVC setSubject:@"blablabla"]];
        [mailVC setMessageBody:@"blablabla" isHTML:NO]; 
        mailVC.modalPresentationStyle = UIModalPresentationFormSheet;
        mailVC.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

        if(isIpad) {
            [sharedParentViewController presentViewController:mailVC animated:YES completion:nil];
        } else {
            [sharedNavigationViewController presentViewController:mailVC animated:YES completion:nil];
        }
    }

sharedParentViewController并sharedNavigationViewController定义了宏来访问应用程序中的任何位置的根视图控制器.

我为所有例外设置了一个断点,但不幸的是,它从未打破过.

使用iOS6和iOS5,一切正常,任何想法,我可以尝试解决这个问题？

编辑:

这是崩溃日志:

Stack Trace

Auto Layout still required after executing -layoutSubviews. MFComposeSubjectView's implementation of -layoutSubviews needs to call super.

0   CoreFoundation                      0x3099ff4b <redacted> …