如何使用 MFMailComposeViewController 发送图像

Question

我正在尝试使用 MFMailComposeViewController 发送电子邮件，但不知何故它不起作用。当我不发送图像时，一切正常。但如果我尝试添加照片，则会出现以下错误：

-(IBAction)gonder:(id)sender{
  MFMailComposeViewController *mailComposeViewController = [[MFMailComposeViewController alloc] init];
  mailComposeViewController.mailComposeDelegate = self;

  [mailComposeViewController setSubject:@"deneme"];
  UIImage *savedImage = self.image;
  NSData *imageData = UIImagePNGRepresentation(savedImage);
  [mailComposeViewController addAttachmentData:imageData mimeType:@"image/png" fileName:@"photo"];
  NSString *emailBody = @"my text";
  [mailComposeViewController setMessageBody:emailBody isHTML:NO];

  [emailBody release];
  NSArray *alicilar=[[NSArray alloc]initWithObjects:@"mymailadress.com", nil];
  [mailComposeViewController setToRecipients:alicilar];

  [mailComposeViewController view];
}

- (void) mailComposeController:(MFMailComposeViewController*)mailComposeViewController bodyFinishedLoadingWithResult:(NSInteger)result error:(NSError*)error
{
  @try
  {
    id mailComposeController = [mailComposeViewController valueForKeyPath:@"internal.mailComposeController"];
    id sendButtonItem = [mailComposeViewController valueForKeyPath:@"internal.mailComposeView.sendButtonItem"];
    [mailComposeController performSelector:@selector(send:) withObject:sendButtonItem];
  }
  @catch (NSException *e) {}
  [mailComposeViewController release];
}

这些是错误：
2012-02-14 16:19:58.322 il[653:307] *** 错误：FigCreateCGImageFromJPEG 返回 -12905。输入（空）为 444585 字节。

Answer 1

您尝试附加的图像非常大吗？这可能是内存不足的问题。

Answer 2

我认为问题在于创建数据对象的方式。试试这个：

NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(savedImage)];

也可以考虑使用 JPEG 而不是 PNG，它的速度要快得多。