MFMailComposeViewController不发送邮件

这是IOS4中的一个bug。

有些读者可能会面临这个问题:

一定要执行 <MFMailComposeViewControllerDelegate>

// in TestViewController.h
@interface TestViewController : UIViewController<MFMailComposeViewControllerDelegate>
@end

// in TestViewController.m
@interface TestViewController ()
@end

@implementation
- (void) compose {
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;

    [picker setSubject:@"Hello there"];

    [picker setToRecipients:@[]];

    // Fill out the email body text
    NSString *emailBody = @"Hello, sending a message from my app";

    [picker setMessageBody:emailBody isHTML:NO];

    // use this function. presentModalViewController:... is deprecated
    [self presentViewController:picker animated:YES completion:nil];
}

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    [self dismissViewControllerAnimated:YES completion:nil];
}
@end

如果看不到代码片段就很难判断,但是您应该检查以下内容:

1) 您已正确设置 MFMailComposeViewController's

setSubject:

3) 您已使用设置消息正文 setMessageBody:isHTML:

并可以选择使用 addAttachmentData:mimeType:fileName:

[self presentModalViewController:mcvc animated:YES];

希望这有帮助。