无法显示正确的图像时重新加载tableview在ios

Question

我有一个问题：我想重新加载tableview，但它只重新加载标签，我无法重新加载图像的按钮。这是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
    { 
     static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
     UILabel *FileNameLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 100, 30)]; 
     FileNameLabel.tag = 1000; 
     FileNameLabel.backgroundColor = [UIColor clearColor]; 
     FileNameLabel.font = [UIFont fontWithName:@"Helvetica" size:16]; 
     FileNameLabel.font = [UIFont boldSystemFontOfSize:16]; 
     FileNameLabel.textColor = [UIColor blackColor]; 
     NSLog(@"AllItemsArrayarray: %@", AllItemsArray); 
     // FileNameLabel.text =[temp objectAtIndex:indexPath.row]; 
     [cell.contentView addSubview: FileNameLabel]; 
     [FileNameLabel release]; 

     UILabel *UploadTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, 150, 25)]; 
     UploadTimeLabel.tag = 2000; 
     UploadTimeLabel.backgroundColor = [UIColor clearColor]; 
     UploadTimeLabel.font = [UIFont fontWithName:@"Helvetica" size:12]; 
     UploadTimeLabel.textColor = [UIColor grayColor]; 
     // UploadTimeLabel.text = [UploadTimeArray objectAtIndex:indexPath.row]; 
     [cell.contentView addSubview: UploadTimeLabel]; 
     [UploadTimeLabel release]; 
     UILabel *pricelabel = [[UILabel alloc] initWithFrame:CGRectMake(80, 0, 80, 30)]; 


     pricelabel.backgroundColor = [UIColor clearColor]; 
     pricelabel.font = [UIFont fontWithName:@"Helvetica" size:16]; 
     pricelabel.font = [UIFont boldSystemFontOfSize:16]; 
     pricelabel.textColor = [UIColor darkGrayColor]; 
     pricelabel.tag = 3000; 
     //pricelabel.hidden = YES; 
     pricelabel.textAlignment = NSTextAlignmentRight; 
     [cell.contentView addSubview: pricelabel]; 
     [pricelabel release]; 

     market = [UIButton buttonWithType:UIButtonTypeCustom]; 
     market.tag = 4000; 


     // [market addTarget:self action:@selector(marketPressedAction:) forControlEvents:UIControlEventTouchDown]; 

     // [market setTag:indexPath.row]; 
     [market setFrame:CGRectMake(200, 6, 30, 30)]; 
     [cell.contentView addSubview:market]; 
    } 

    marketButton = (UIButton*)[cell.contentView viewWithTag:4000]; 
    if([sellingArray count]>0) 
    { 
     NSLog(@"sellingArray %@",sellingArray); 
     if([[sellingArray objectAtIndex:indexPath.row] isEqualToString:@"0"]) // nothing 
     { 

      [marketButton setSelected:NO]; 
      [marketButton setImage:[UIImage imageNamed:@"Marketplace.png"] forState:UIControlStateNormal]; 
      marketButton.enabled = YES; 

     } 
     else if([[sellingArray objectAtIndex:indexPath.row] isEqualToString:@"2"]) // marketplace 
     { 

      [marketButton setSelected:YES]; 
      [marketButton setImage:[UIImage imageNamed:@"MarketplaceSelect.png"] forState:UIControlStateNormal]; 
      marketButton.enabled = YES; 
      // auctionButton.enabled = NO; 
     } 
    } 
    [marketButton addTarget:self action:@selector(marketPressedAction:) forControlEvents:UIControlEventTouchDown]; 

    [marketButton setTag:indexPath.row]; 

    //} 


     if([temp count] > 0) 
    { 
     UILabel *fileNameLbl = (UILabel*)[cell.contentView viewWithTag:1000]; 
     fileNameLbl.text =[temp objectAtIndex:indexPath.row]; 

     UILabel *uploadlbl = (UILabel*)[cell.contentView viewWithTag:2000]; 
     uploadlbl.text =[UploadTimeAllArr objectAtIndex:indexPath.row]; 
    } 
    if([priceNewArray count]> 0) 
    { 
     UILabel *pricelbl = (UILabel*)[cell.contentView viewWithTag:3000]; 
     pricelbl.text =[NSString stringWithFormat:@"$%@",[priceNewArray objectAtIndex:indexPath.row]]; 
     if ([sellingArray count]>0) { 
      if([[sellingArray objectAtIndex:indexPath.row] isEqualToString:@"2"]){ 
       pricelbl.hidden = NO; 
      } 
      else if([[sellingArray objectAtIndex:indexPath.row] isEqualToString:@"0"]){ 
       pricelbl.hidden = YES; 

     } 

     } 


    } 
UIImage *image = [UIImage imageNamed:@"More.png"]; 

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; 
    CGRect frame = CGRectMake(0.0, 0.0, image.size.width, image.size.height); 
    button.frame = frame; // match the button's size with the image size 

    //[button setBackgroundImage:image forState:UIControlStateNormal]; 
    [button setImage:image forState:UIControlStateNormal]; 
    // set the button's target to this table view controller so we can interpret touch events and map that to a NSIndexSet 
    [button addTarget:self action:@selector(checkButtonTapped:event:) forControlEvents:UIControlEventTouchUpInside]; 
    button.backgroundColor = [UIColor clearColor]; 
    cell.accessoryView = button; 

    _tableView.contentInset = UIEdgeInsetsMake(0, 0, 100, 0); 

    return cell; 
    } 

我上面的代码，当调用[table reloaddata]，所有的标签，除了重装按钮（按钮市场）没有显示正确的图像中。我不知道这是为什么。你可以提出任何建议吗？在此先感谢

Answer 1

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath遵循始终相同的模式。 如果它找到一个单元并且取决于您对其进行配置，则会将它取出。如果它找不到一个单元格（nil ==单元格），则必须创建一个新的单元格，然后执行配置步骤。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) 
    { 
     market = [UIButton buttonWithType:UIButtonTypeCustom]; 
    } 
    // configure the market button 
    return cell; 
} 

一个普遍的建议是用故事板/接口生成工具来配置你所需要的细胞或子类UITableViewCell有自己的细胞。这将大大简化您的代码并提高可读性。