基於行索引的自定義單元格iphone

Question

我想知道是否可以添加單元格內容到基於行索引的uitableview？

例如，如果它是第一個單元格（第0行），我想添加圖像和文本。 如果是第二行，我想添加一個按鈕。 對於其他所有行，我只想添加一行文本。

我試過使用indexPath.row。它工作的第一次，但是當我滾動屏幕，然後備份我的第一個圖像消失。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    PromoListItem *promo = [promoList objectAtIndex:indexPath.row]; 

    static NSString *CellIdentifier = @"Cell"; 

    AsyncImageView *asyncImageView = nil; 
    UILabel *label = nil; 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 

    if(indexPath.row==0) 
    { 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
     CGRect frame; 
     frame.origin.x = 0; 
     frame.origin.y = 0; 
     frame.size.width = 100; 
     frame.size.height = 100; 

     asyncImageView = [[[AsyncImageView alloc] initWithFrame:frame] autorelease]; 
     asyncImageView.tag = ASYNC_IMAGE_TAG; 
     [cell.contentView addSubview:asyncImageView]; 


     frame.origin.x = 110; 
     frame.size.width =100; 
     label = [[[UILabel alloc] initWithFrame:frame] autorelease]; 
     label.tag = LABEL_TAG; 
     [cell.contentView addSubview:label]; 
     cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
    } else { 
     asyncImageView = (AsyncImageView *) [cell.contentView viewWithTag:ASYNC_IMAGE_TAG]; 
     label = (UILabel *) [cell.contentView viewWithTag:LABEL_TAG]; 
    } 

    NSURL *url = [NSURL URLWithString:promo.imgurl]; 

    [asyncImageView loadImageFromURL:url]; 

    label.text = promo.artistname; 
    }else 

    { 

     if (cell == nil) { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
      CGRect frame; 
      frame.origin.x = 0; 
      frame.origin.y = 0; 
      frame.size.width = 100; 
      frame.size.height = 100; 

      //asyncImageView = [[[AsyncImageView alloc] initWithFrame:frame] autorelease]; 
     // asyncImageView.tag = ASYNC_IMAGE_TAG; 
     // [cell.contentView addSubview:asyncImageView]; 


      frame.origin.x = 110; 
      frame.size.width =100; 
      label = [[[UILabel alloc] initWithFrame:frame] autorelease]; 
      label.tag = LABEL_TAG; 
      [cell.contentView addSubview:label]; 
      cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
     } else { 
     // asyncImageView = (AsyncImageView *) [cell.contentView viewWithTag:ASYNC_IMAGE_TAG]; 
      label = (UILabel *) [cell.contentView viewWithTag:LABEL_TAG]; 
     } 

     //NSURL *url = [NSURL URLWithString:promo.imgurl]; 

     //[asyncImageView loadImageFromURL:url]; 

     label.text = promo.artistname; 



    } 

    return cell; 
} 

Answer 1

如何定製你想要這些細胞？如果只添加文本，圖像和附件按鈕，則可以在行檢查之外創建單元格，然後在這些if語句內添加所需的項目。

cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
    NSUInteger row = [indexPath row]; 
    switch(row) { 
     case 0: 
      cell.textLabel.text = @"row 0"; 
      cell.image 
      break; 
     case 1: 
      cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
      break; 
     default: 
      cell.textLabel.text = [NSString stringWithFormat:@"row %d",row]; 
      break;  
    } 

    return cell; 

然而，行，當你開始回收你的細胞會發生變化，你可能想在指示電池應該如何工作的實際數據的東西。