自定义 UITableViewCell 的高度 [英] Customizing UITableViewCell's height

问题描述

如何根据 UITableViewCells 中的内容量缩放它们?在我的单元格中，我使用了 3 个代表论坛的标签.标签被命名为别名"、日期"和评论".第三个标签注释，可以是任意数量的大小.因此，我的单元格需要根据评论"标签的大小动态变化.以下是我的相关代码:

How can I scale UITableViewCells based on the amount of content in them? In my cells I use 3 labels which represent a forum. The labels are named "alias", "date", and "comments". The third label comments, can be any number of size. Therefore, my cells need to become dynamically depending on how big the "comments" label is. Below is my relevant code:

- (UITableViewCell *)tableView:(UITableView *)pTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"ForumthreadCell";
UITableViewCell *cell = [pTableView dequeueReusableCellWithIdentifier:CellIdentifier];

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

Feedback *item = [self.items objectAtIndex:indexPath.row];

UILabel *aliasLabel = (UILabel *)[cell viewWithTag:1];
UILabel *commentLabel = (UILabel *)[cell viewWithTag:2];
UILabel *dateLabel = (UILabel *)[cell viewWithTag:3];

[aliasLabel setText:item.alias];
[commentLabel setText:item.comment];
[dateLabel setText:[self.dateFormatter stringFromDate:[NSDate    dateWithTimeIntervalSince1970:(double)item.time]]];

commentLabel.numberOfLines = 0;
[commentLabel sizeToFit];

CGSize textHeight = [commentLabel.text sizeWithFont:commentLabel.font  constrainedToSize:CGSizeMake(maxWidth, lineHeight *    commentLabel.numberOfLines)lineBreakMode:UILineBreakModeWordWrap];

return cell;
}

如您所见，我使用 textHeight 设置了 commentsLabel 的高度.但从今以后我该怎么办?如果我知道标签的高度，如何根据 commentLabel 的高度设置单元格的高度?.请根据我的代码给出代码示例.我想我应该使用以下方法，但我不知道该怎么做:

As you can see, I set the height of the commentsLabel with textHeight. But what shall I do from now on? If I know the height of the label, how can I set the Cell's height depending on commentLabel's height?. Please give code-examples based on my code. I think I should use the following method but I am not sure how to do it:

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

}

推荐答案

使用该方法获取文本的高度

Use this method to get the text height of the text

-(CGFloat)getLabelHeightForText:(NSString *)text andWidth:(CGFloat)labelWidth
{

CGSize maximumSize = CGSizeMake(labelWidth, 10000);

//provide appropriate font and font size
CGSize labelHeighSize = [text sizeWithFont: [UIFont fontWithName:@"Trebuchet MS" size:13.0f]
                         constrainedToSize:maximumSize
                             lineBreakMode:UILineBreakModeTailTruncation];
return labelHeighSize.height;
}

此方法将返回您传递的文本的高度.在您的类中添加此方法.并使用tableView:heightForRowAtIndexPath:委托方法设置每个单元格的高度

This method will return the height of the text you are passing. Add this method in your class. And use the tableView:heightForRowAtIndexPath: delegate method to set the height for each cell

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
   Feedback *item = [self.items objectAtIndex:indexPath.row];

   CGFloat textHeight = [self getLabelHeightForText:item.comment andWidth:162];//give your label width here
    return textHeight;
}    

我认为这可以解决问题.

I think this could solve the problem.

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