Ios UITableViewCell'；s向上滚动后的高度变化？

目前，当我在tableView中向上滚动时，我发现了一个奇怪且恼人的bug。当我决定释放“卷轴”时，意味着我正在放下“卷轴”，这样“视图”将返回到显示所有TableView内容的正常位置，我的一些单元格会因为某种原因在宽度上重新调整大小。我不知道为什么会发生这种情况，也不知道问题出在哪里

“我的手机”（commentLabel）根据论坛中标签的高度定制为合适的尺寸。我想问题可能在于我如何定制手机内容。我会发布我的相关代码，也会发布到下面的图片

开始向上拖动滚动之前：

释放/放下卷轴后，卷轴再次回到正常位置。现在其中一个单元格已更改：

代码：

- (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];

    return cell;

}

-(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:12.0f]
                     constrainedToSize:maximumSize
                         lineBreakMode:UILineBreakModeTailTruncation];
    return labelHeighSize.height;

}

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

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

    CGFloat commentTextHeight = [self getLabelHeightForText:item.comment andWidth:162];
    return commentTextHeight + 39;

}

CGRect frame = commentLabel.frame;
frame.size.width = kLabelWidth;
frame.size.height = 10000;
commentLabel.frame = frame;

frame = commentLabel.frame;
frame.size.height += kOffset;
commentLabel.frame = frame;

static const CGFloat kLabelWidth = 162;
static const CGFloat kOffset = 39;

- (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]]];

    CGRect frame = commentLabel.frame;
    frame.size.width = kLabelWidth;
    frame.size.height = 10000;
    commentLabel.frame = frame;

    frame = commentLabel.frame;
    frame.size.height += kOffset;
    commentLabel.frame = frame;

    commentLabel.numberOfLines = 0;
    [commentLabel sizeToFit];

    return cell;

 }

编辑

新代码：

- (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];

    return cell;

}

-(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:12.0f]
                     constrainedToSize:maximumSize
                         lineBreakMode:UILineBreakModeTailTruncation];
    return labelHeighSize.height;

}

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

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

    CGFloat commentTextHeight = [self getLabelHeightForText:item.comment andWidth:162];
    return commentTextHeight + 39;

}

CGRect frame = commentLabel.frame;
frame.size.width = kLabelWidth;
frame.size.height = 10000;
commentLabel.frame = frame;

frame = commentLabel.frame;
frame.size.height += kOffset;
commentLabel.frame = frame;

static const CGFloat kLabelWidth = 162;
static const CGFloat kOffset = 39;

- (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]]];

    CGRect frame = commentLabel.frame;
    frame.size.width = kLabelWidth;
    frame.size.height = 10000;
    commentLabel.frame = frame;

    frame = commentLabel.frame;
    frame.size.height += kOffset;
    commentLabel.frame = frame;

    commentLabel.numberOfLines = 0;
    [commentLabel sizeToFit];

    return cell;

 }

但是我做了一些错误的事情，因为现在commentLabel中的文本显示不正确，在我如何设置框架的过程中，有人能看出我的错误吗？这就是细胞现在的样子

新的完整代码：

- (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];

    return cell;

}

-(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:12.0f]
                     constrainedToSize:maximumSize
                         lineBreakMode:UILineBreakModeTailTruncation];
    return labelHeighSize.height;

}

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

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

    CGFloat commentTextHeight = [self getLabelHeightForText:item.comment andWidth:162];
    return commentTextHeight + 39;

}

CGRect frame = commentLabel.frame;
frame.size.width = kLabelWidth;
frame.size.height = 10000;
commentLabel.frame = frame;

frame = commentLabel.frame;
frame.size.height += kOffset;
commentLabel.frame = frame;

static const CGFloat kLabelWidth = 162;
static const CGFloat kOffset = 39;

- (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]]];

    CGRect frame = commentLabel.frame;
    frame.size.width = kLabelWidth;
    frame.size.height = 10000;
    commentLabel.frame = frame;

    frame = commentLabel.frame;
    frame.size.height += kOffset;
    commentLabel.frame = frame;

    commentLabel.numberOfLines = 0;
    [commentLabel sizeToFit];

    return cell;

 }

---

在重复使用单元格之前，应调整标签框。在您的情况下，您正在更改单元格高度，同时在中重复使用它

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

---

但您也应该根据单元格的高度调整标签的边框，这样它就不会超出单元格的边界。

在

heightForRowAtIndexPath

中，返回的是什么？是否有可能

项。注释可以为零，并且返回零？记住单元格是重复使用的。试试这个-[commentLabel setFrame:CGRectMake（commentLabel.frame.origin.x，commentLabel.frame.origin.y，kLabelWidth，[self-getLabelHeightForText:item.comment and Width:kLabelWidth]）Thanx对于答案，我现在的问题是单元格的高度，出于某种原因，它们似乎完全随机。对此有何想法？要么删除heightForRowAtIndexPath中设置的偏移量（commentTextHeight+39），要么在commentLabel的高度中添加相同的偏移量。[commentLabel setFrame:CGRectMake（commentLabel.frame.origin.x，commentLabel.frame.origin.y，kLabelWidth，[self-getLabelHeightForText:item.comment and Width:kLabelWidth]+39]