objective-c - UITableView 最后两个单元格中的信息与前两个单元格重复

Question

我有一个 UITableView，它使用以下代码从 XML 加载数据。它正确加载信息，但数组中的最后两个单元格是前两个单元格的重复。我不知道我是否加载不正确；我在构建数组时 NSLog 输出了值，它们是正确的。我还记录了最终数组，这很好。

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

    static NSString *CellIdentifier = @"Cell";

    ViewRoutesCell * aCell = (ViewRoutesCell *)[tableView dequeueReusableCellWithIdentifier:@"ViewRoutesCell"];

    if (aCell == nil)
    {   
        NSArray *arr = [[NSBundle mainBundle] loadNibNamed:@"ViewRoutesCell" owner:self options:nil];

        for (NSObject *anObj in arr) {

                AssessObject *newObj1 = [[AssessObject alloc] init];
                newObj1=[totalArray objectAtIndex:indexPath.row];
            UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:newObj1.routeImage]]];

                aCell = (ViewRoutesCell *)anObj;
                aCell.imgRoute.image = image;
                aCell.lblRouteText.text = newObj1.routeText;
                aCell.lblRouteImage.text = newObj1.routeImage;
        }
}
    return aCell;
}

它正在加载到自定义单元格。在我看来，问题可能与细胞的重用有关。有什么想法吗？

Answer 1

您必须按如下方式重写代码:

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

    static NSString *CellIdentifier = @"Cell";

    ViewRoutesCell * aCell = (ViewRoutesCell *)[tableView dequeueReusableCellWithIdentifier:@"ViewRoutesCell"];

    if (aCell == nil)
    {   
        NSArray *arr = [[NSBundle mainBundle] loadNibNamed:@"ViewRoutesCell" owner:self options:nil];
        aCell = (ViewRoutesCell *)[arr objectAtIndex:0];
    }

    AssessObject *newObj1 = [[AssessObject alloc] init];
    newObj1=[totalArray objectAtIndex:indexPath.row];
    UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:newObj1.routeImage]]];

    aCell.imgRoute.image = image;
    aCell.lblRouteText.text = newObj1.routeText;
    aCell.lblRouteImage.text = newObj1.routeImage;

    return aCell;
}

否则，您的单元格将使用旧值进行缓存。