iphone - iPhoneのループの非同期

Question

for ループは次のように表示されます。これは、ビューで記述したものが読み込まれたため、このページの読み込みに時間がかかります。

for (int i=3; i<[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]count]; i++)
{


    if (i%3==0)
    {
        x=0;
        y++;
    }

    view=[[UIView alloc]initWithFrame:CGRectMake((x*250)+5, (y*404)+6, 244, 400)];
    [view setBackgroundColor:[UIColor whiteColor]];
    view.layer.borderColor=[[UIColor whiteColor]CGColor];
    view.layer.borderWidth=1.0;
    view.layer.cornerRadius = 5;
    view.layer.masksToBounds = YES;
    [scroller addSubview:view];

titlelabel=[[UILabel alloc]initWithFrame:CGRectMake(10, 10, 230, 20)];
    [titlelabel setText:[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"title"]objectForKey:@"text"]];
    [titlelabel setNumberOfLines:0];
    titlelabel.font=[UIFont boldSystemFontOfSize:15.0f];




    [titlelabel setBackgroundColor:[UIColor clearColor]];
    [titlelabel sizeToFit];
    [view addSubview:titlelabel];

    datelabel=[[UILabel alloc]initWithFrame:CGRectMake(10, 62, 190, 20)];
    [datelabel setText:[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"title"]objectForKey:@"text"]];
    [datelabel setNumberOfLines:0];
    datelabel.font=[UIFont fontWithName:@"arial" size:12.0f];
    [datelabel setBackgroundColor:[UIColor clearColor]];
    [datelabel sizeToFit];
    [view addSubview:datelabel];

    NSData *data=[[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:[[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"image"]objectForKey:@"text"]stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]]];
    NSLog(@"data= %@",data);
    if (data==NULL ||[[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"image"]objectForKey:@"text"] isEqualToString:@""])
    {
        textview=[[UITextView alloc]initWithFrame:CGRectMake(2,80, 238, 386)];
        [textview setText:[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"title"]objectForKey:@"text"]];
        [textview setFont:[UIFont fontWithName:@"ArialMT" size:14]];
        [textview setDelegate:self];
        [view addSubview:textview];
    }
    else
    {
        imageview=[[UIImageView alloc]initWithFrame:CGRectMake(7, 80, 230, 150)];
        [imageview setImage:[UIImage imageWithData:data]];
        [view addSubview:imageview];

        textview=[[UITextView alloc]initWithFrame:CGRectMake(5, 240, 238, 200)];
        [textview setText:[[[[[[dataDict objectForKey:@"rss"]objectForKey:@"channel"]objectForKey:@"item"]objectAtIndex:i]objectForKey:@"title"]objectForKey:@"text"]];
        [textview setFont:[UIFont fontWithName:@"ArialMT" size:14]];
        [textview setDelegate:self];
        [view addSubview:textview];
    }

}

ここで問題になるのは、サーバーから毎回取得する画像であるため、これが遅くなるため、遅延読み込みとして行う方法を提案してください....

前もって感謝します