Question

I have a problem displaying UITableView: Some cells are empty, and content in cells becomes visible only after scrolling (if empty cell scrolls out of the screen and then goes back). I Can t understand what might be the problem.

www.un.org/spanish/ecosoc 我的法典是:。

- (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;
}

Thank you in advance for your suggestions!

Answer 1

Well, you have the cell customization code that happens before you create the cell.

更改如下:

- (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;
}

Answer 2

The problem is that you make

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

before

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

改变顺序。正在发生的是,你第一次执行表格。你们从来不去在座。当你重新使用电池时,由于电池!= 无

Answer 3

You need to put these lines

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

after the if(){...} condition.

第一个穿过囚室为零。在<代码>之前的这些行文不成。因此,你看着空洞的囚室。

A brief question

为什么请<代码>。名单保留了?

希望会有所帮助。

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