索引路径处的行的表视图方法单元格再次重新加载，然后应用程序崩溃

Question

在我的应用程序中，我在一行中有一个表格视图和 4 个图像视图。当我滚动表视图时，再次调用索引路径方法中的行单元格，然后应用程序崩溃。如何防止滚动时表视图重新加载。我的代码部分是：-

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = nil;
    static NSString *AutoCompleteRowIdentifier = @"AutoCompleteRowIdentifier";


    cell = [tableView dequeueReusableCellWithIdentifier:AutoCompleteRowIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:AutoCompleteRowIdentifier] autorelease];

        for (int i=0; i <= [wordsInSentence count]; ++i) {
            UIImageView *imageView1 = [[[UIImageView alloc] initWithFrame:CGRectMake(30+90*(i%4), 15, 80, 100)] autorelease] ;
            imageView1.tag = i+1;

            [imageViewArray insertObject:imageView1 atIndex:i];
            [cell.contentView addSubview:imageView1];
        }

    }

    int photosInRow;

    if ( (indexPath.row < [tableView numberOfRowsInSection:indexPath.section] - 1) || ([wordsInSentence count] % 4 == 0) ) {
        photosInRow = 4;
    } else {
        photosInRow = [wordsInSentence count] % 4;
    }

    for ( int i = 1; i <=photosInRow ; i++ ){
        imageView = (UIImageView *)[cell.contentView viewWithTag:j];
        [self showImage:imageView];
    }

    return cell;
}

请帮忙。任何帮助将不胜感激。

谢谢， 克里斯蒂

Answer 1

我看到的唯一问题是，

for ( int i = 1; i <= photosInRow ; i++ ){
    imageView = (UIImageView *)[cell.contentView viewWithTag:j];
    [self showImage:imageView];
}

这里的 j 是什么？我建议您将其更改为 i 即，

for ( int i = 1; i <=photosInRow ; i++ ){
    imageView = (UIImageView *)[cell.contentView viewWithTag:i];
    [self showImage:imageView];
}

因为我看到的唯一其他缺陷就是这里的逻辑，

for (int i=0; i <= [wordsInSentence count]; ++i) {
    UIImageView *imageView1 = [[[UIImageView alloc] initWithFrame:CGRectMake(30+90*(i%4), 15, 80, 100)] autorelease] ;
    imageView1.tag = i+1;

    [imageViewArray insertObject:imageView1 atIndex:i];
    [cell.contentView addSubview:imageView1];
}

您只需要连续添加 4 个图像视图。不是每行中图像视图的总数。这是有缺陷的逻辑。建议更新为

for (int i = 0; i < 4; ++i) {
    UIImageView *imageView1 = [[[UIImageView alloc] initWithFrame:CGRectMake(30+90*(i%4), 15, 80, 100)] autorelease] ;
    imageView1.tag = i+1;

    int trueImageIndex = indexPath.row * 4 + i;
    [imageViewArray insertObject:imageView1 atIndex:trueImageIndex];

    [cell.contentView addSubview:imageView1];
}