如何使用电子邮件正文附加 NSMutableArray 数据？

Question

我正在尝试将 NSMutableArray 数据附加到电子邮件正文。这是我的 NSMutableArray 代码：

NSUserDefaults *defaults1 = [NSUserDefaults standardUserDefaults];
    NSString *msg1 = [defaults1 objectForKey:@"key5"];
    NSData *colorData = [defaults1 objectForKey:@"key6"];
    UIColor *color = [NSKeyedUnarchiver unarchiveObjectWithData:colorData];
    NSData *colorData1 = [defaults1 objectForKey:@"key7"];
    UIColor *color1 = [NSKeyedUnarchiver unarchiveObjectWithData:colorData1];
    NSData *colorData2 = [defaults1 objectForKey:@"key8"];
    UIFont *color2 = [NSKeyedUnarchiver unarchiveObjectWithData:colorData2];
    CGFloat x =(arc4random()%100)+100;
    CGFloat y =(arc4random()%100)+250;  
    lbl = [[UILabel alloc] initWithFrame:CGRectMake(x, y, 100, 70)];
    lbl.userInteractionEnabled=YES;
    lbl.text=msg1;
    lbl.backgroundColor=color;
    lbl.textColor=color1;
    lbl.font =color2;
    lbl.lineBreakMode = UILineBreakModeWordWrap;
    lbl.numberOfLines = 50;
    [self.view addSubview:lbl];
    [viewArray addObject:lbl ];

现在，如果我的 viewArray 包含 3 个 UILabel 以及上面提到的所有这些属性。那么如何将这个 viewArray 附加到电子邮件正文中。这是我的电子邮件代码。

   - (IBAction)sendEmail
  {

  if ([MFMailComposeViewController canSendMail])
  {
     NSArray *recipients = [NSArray arrayWithObject:@"example@yahoo.com"];
     MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] 
          init];
    controller.mailComposeDelegate = self;
    [controller setSubject:@"Iphone Game"];

    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:viewArray];
   [controller addAttachmentData:data mimeType:@"application/octet-stream";  
    fileName:nil]; 

     NSString *emailBody = @"Happy Valentine Day!";
    [controller setMessageBody:emailBody isHTML:NO
    [controller setToRecipients:recipients];
    [self presentModalViewController:controller animated:YES];
    [controller release];

}
else 
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert"
                                                    message:@"Your device is not set up for email." 
                                                   delegate:self 
                                          cancelButtonTitle:@"OK" 
                                          otherButtonTitles: nil];

    [alert show];

    [alert release];
}

}

我没有收到错误。但没有看到电子邮件正文中的任何数据。在 viewArray 中。请任何人指导我如何将我的 viewArray 数据附加到电子邮件中。

Answer 1

发送前检查 NSData 是否为 nil。

即;

[controller setSubject:@"Iphone Game"];

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:viewArray];

if(!data){
    NSLog(@"Data is nil");

    return;
}
[controller addAttachmentData:data mimeType:@"application/octet-stream";  
fileName:nil];