MFMailComposeViewController不从视图中Dismissing

Question

当操作表上的按钮被调用时，我有下面的代码被调用。但当我按取消，然后删除草案，它只是冻结，不解散。我在app的其他地方使用相同的代码它从tableview单元格的select中调用它在那里工作。知道为什么这里不行吗?

当它冻结时，控制台也没有错误消息。

if([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    [picker setSubject:@"Dr. Chrono Support"];
    NSDictionary* infoDict = [[NSBundle mainBundle] infoDictionary];
    NSString* versionNum = [infoDict objectForKey:@"CFBundleVersion"];
    NSString *appName = [infoDict objectForKey:@"CFBundleDisplayName"];
    NSString *text = [NSString stringWithFormat:@"%@ %@",appName,versionNum];
    // Set up recipients
    NSArray *toRecipients = [NSArray arrayWithObject:@"[e-mail]"]; 
    //NSArray *ccRecipients = [NSArray arrayWithObjects:@"[e-mail]", @"[e-mail]", nil]; 
    //NSArray *bccRecipients = [NSArray arrayWithObject:@"[e-mail]"]; 
    [picker setToRecipients:toRecipients];
    //[picker setCcRecipients:ccRecipients];  
    //[picker setBccRecipients:bccRecipients];
    // Attach an image to the email
    //NSString *path = [[NSBundle mainBundle] pathForResource:@"rainy" ofType:@"png"];
    //NSData *myData = [NSData dataWithContentsOfFile:path];
    //[picker addAttachmentData:myData mimeType:@"image/png" fileName:@"rainy"];
    // Fill out the email body text
    NSString *emailBody = text;
    [picker setMessageBody:emailBody isHTML:NO];
    [self presentModalViewController:picker animated:YES];
    [picker release];
}

Answer 1

您需要实现委托方法:

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {

然后在这个委托方法中添加:

[self dismissModalViewControllerAnimated:YES];

，它应该工作正常。

你不需要寻找结果(只有当你想要显示"谢谢"警报或其他东西，例如，如果用户确实点击了发送)

Answer 2

使用以下代码

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled: 
            NSLog(@"Mail cancelled: you cancelled the operation and no email message was queued");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Mail saved: you saved the email message in the Drafts folder");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Mail send: the email message is queued in the outbox. It is ready to send the next time the user connects to email");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Mail failed: the email message was nog saved or queued, possibly due to an error");
            break;
        default:
            NSLog(@"Mail not sent");
            break;
    }
    [self dismissModalViewControllerAnimated:YES];
}