ios - UITableView 出现空单元格

Question

我在显示 UITableView 时遇到问题:有些单元格是空的，单元格中的内容只有在滚动后才可见(如果空单元格滚出屏幕然后返回)。我不明白可能是什么问题。

这是我的代码:

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self updateFilesList];
    [tableView reloadData];
}

- (void) viewDidAppear:(BOOL)animated
{
    animated = YES;
    [self updateFilesList];
    [self.tableView reloadData];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    [self.filesList retain];

    NSString *title = [self.filesList objectAtIndex:indexPath.row];
    title = [title stringByDeletingPathExtension];
    title = [title lastPathComponent];
    if (title.length >33) {
        title = [title substringFromIndex:33];
    }

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    [cell.imageView setImage:[UIImage imageNamed:@"oie_png-1.png"]];
    cell.textLabel.text = title;

    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }

    return cell;
}

提前感谢您的建议!

Answer 1

好吧，在创建单元之前，您已经有了单元自定义代码。

像这样改变它:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    [self.filesList retain];

    NSString *title = [self.filesList objectAtIndex:indexPath.row];
    title = [title stringByDeletingPathExtension];
    title = [title lastPathComponent];
    if (title.length >33) {
        title = [title substringFromIndex:33];
    }

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    // This part creates the cell for the firs time
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }

    // This part customizes the cells
    [cell.imageView setImage:[UIImage imageNamed:@"oie_png-1.png"]];
    cell.textLabel.text = title;


    return cell;
}