Question

我有一个应该显示新闻的UITableView。我确实设置了2个自定义单元格 - ＆gt;一个人有没有图像的新闻，另一个人有图像新闻。所以细胞需要不同的高度。在故事板中，我创建了这两个单元格，它们每个都有一个自定义高度（280个带图像，130个没有）。

出于测试目的，我希望第一个和第三个单元格成为新闻单元+图像。那就是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary * news = [postArray objectAtIndex:indexPath.row]; //PostArray is the array with the news
NSDictionary *authorData = [news valueForKey:@"author"];


NSString *postTitle = [self decodedString:[news valueForKey:@"title"]]; 
//Decode = change html chars
NSString *postExcerpt = [self decodedString:[news valueForKey:@"excerpt"]];
NSString *postComments = [news valueForKey:@"comment_count"];
//NSString *postID = [news valueForKey:@"id"];


NSString *authorFirstName = [self decodedString:[authorData valueForKey:@"first_name"]];
NSString *authorLastName = [self decodedString:[authorData valueForKey:@"last_name"]];
NSString *authorNickName = [self decodedString:[authorData valueForKey:@"nickname"]];

if (indexPath.row == 0 || indexPath.row == 2){



    NewsCellImage *cell = (NewsCellImage *)[tableView dequeueReusableCellWithIdentifier:@"NewsCellImage"];

    if (cell == nil) {
        cell = [[NewsCellImage alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"NewsCellImage"];

    }


    // Set up the cell
    cell.postTitle.text = postTitle;
    cell.postExcerpt.text = postExcerpt;
    cell.postCommentsCount.text = [NSString stringWithFormat:@"%i",indexPath.row];

    //Check if names are empty
    if ([authorFirstName length] == 0 && [authorLastName length] == 0){
        cell.postMeta.text = [NSString stringWithFormat:@"%@ / %@",authorNickName,[news valueForKey:@"date"]];
    } else {
        cell.postMeta.text = [NSString stringWithFormat:@"%@ %@ / %@",authorFirstName,authorLastName,[news valueForKey:@"date"]];
    }

    //Set Image
    NSDictionary *imageData = [news valueForKey:@"thumbnail_images"];
    NSDictionary *imageDataFull = [imageData valueForKey:@"large"];
    NSString *postImage = [imageDataFull valueForKey:@"url"];


    [cell.postImage setImageWithURL:[NSURL URLWithString:postImage]
                   placeholderImage:[UIImage imageNamed:@"menu"]
                          completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {
                              if (error){
                                  NSLog(@"Error bei Bild laden: %@",postTitle);
                              }

                          } usingActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];



    return cell;
} else {

    NewsCell *cell = (NewsCell *)[tableView dequeueReusableCellWithIdentifier:@"NewsCell"];

    if (cell == nil) {
        cell = [[NewsCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"NewsCell"];

    }


    // Set up the cell
    cell.postTitle.text = postTitle;
    cell.postExcerpt.text = postExcerpt;
    cell.postCommentsCount.text = [NSString stringWithFormat:@"%@",postComments];

    //Check if names are empty
    if ([authorFirstName length] == 0 && [authorLastName length] == 0){
        cell.postMeta.text = [NSString stringWithFormat:@"%@ / %@",authorNickName,[news valueForKey:@"date"]];
    } else {
        cell.postMeta.text = [NSString stringWithFormat:@"%@ %@ / %@",authorFirstName,authorLastName,[news valueForKey:@"date"]];
    }



    return cell;
}


}

代码确实有效，这就是启动应用后我可以看到的内容： http://cl.ly/image/320K1y081T3Z

但是当我向下滚动到下一个带有Image的单元格时出错了： http://cl.ly/image/2M2O1X3R2T13

我的代码出了问题，或者我需要添加一些内容 - 但我不知道采取哪种方式。

也许它与

有关

  -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexpath{ }

但我真的不知道。我很感激帮助。 TY

Answer 1

试试这个方法。

 -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexpath{ 

if (indexPath.row == 0 || indexPath.row == 2){
 return newsWithImageHeight; 
}
 else  return newsHeight; 


}

或者您可以在界面建设者中查看单元格的自动布局设置

Answer 2

你是怎么做的：

 -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexpath{ }

那么呢？

我认为你需要这样的东西：

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexpath{
if (indexpath.row == 0 || indexpath.row == 2) {
    return 280;
}
return 130;

}

UITableView + 2自定义单元格=高度错误

2 个答案: