在 cellForRowAtIndexPath 之后调整高度 UITableViewCell

Question

我无法根据自己的限制设置UITableViewCell 的高度。

我在UITableView 的每个单元格中都有一个UILabel，其中高度不固定，取决于此UILabel 的高度。

我在更新标签内容后尝试在单元格上设置框架，但没有任何反应。请在下面找到我的代码：

//On my controller
- (UITableViewCell *)tableView:(UITableView *)tView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"CommentCell";

    CommentCell *commentCell = [tView dequeueReusableCellWithIdentifier:CellIdentifier];

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

    Comment *comment;
    if (commentsArray.count > indexPath.row) {
        comment = [commentsArray objectAtIndex:indexPath.row];
    }
    [commentCell setComment:comment];
    [commentCell setCommonFields];
    currentCellheight = commentCell.contentLabel.frame.size.height + 40;
    DDLogInfo(@"Current Cell Height: %f", currentCellheight);
    return commentCell;
}

//On my custom Cell (CommentCell.m)
-(void)setCommonFields {
    if (self.comment != nil) {
        self.contentLabel.text = self.comment.content;
        self.contentLabel.numberOfLines = 0;
        CGSize maximumLabelSize = CGSizeMake(self.contentLabel.frame.size.width, FLT_MAX);
        CGRect expectedLabelRect = [self.contentLabel.text boundingRectWithSize:maximumLabelSize options:NSStringDrawingUsesLineFragmentOrigin attributes:nil context:nil];
        CGRect newFrame = self.contentLabel.frame;
        newFrame.size.height = expectedLabelRect.size.height;
        self.contentLabel.frame = newFrame;

    }
}

由于heightForRowAtIndexPath 方法，我还尝试设置高度，但此方法称为之前 cellForRowAtIndexPath 更新我的标签。

我没有更多的想法来解决这个问题。

提前谢谢你。

Answer 1

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

{


                NSLog(@"indexPath.row :%ld",(long)indexPath.row);

                CGSize contsize={260.00f,3000.00f};
                UIFont *font=[UIFont fontWithName:@"Helvetica-Bold" size:15.0];

                NSString *strt11=@"hellllllooooooooooooooooooo  hellllllooooooooooooooooooo  hellllllooooooooooooooooooo";

                CGSize fontSize=[strt11 sizeWithFont:font constrainedToSize:contsize lineBreakMode:NSLineBreakByWordWrapping];

                NSLog(@"fontSize indexPath :%f",fontSize.height);

                if (fontSize.height>22)
                    return fontSize.height+50.0f;

           }




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


            UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"reuse"];

            if(cell==nil)
            {

                cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuse"];



                UILabel *lblcomment=[[UILabel alloc] initWithFrame:CGRectMake(55,23, 160,20)];
                [lblcomment setBackgroundColor:[UIColor clearColor]];
                [lblcomment setTag:72];
                [lblcomment setTextColor:[UIColor grayColor]];
                [lblcomment setNumberOfLines:0];
                [lblcomment setFont:[UIFont fontWithName:@"Helvetica" size:15.0]];
                [lblcomment setText:@"Its rude day on goin...Its rude day on goin...Its rude day on goin..."];

                [cell addSubview:lblcomment];
            }
            UILabel *lblcomment=(UILabel *)[cell viewWithTag:72];



            CGSize contsize={260.00f,3000.00f};
            UIFont *font=[UIFont fontWithName:@"Helvetica-Bold" size:15.0];

            NSString *strt11=@"hellllllooooooooooooooooooo  hellllllooooooooooooooooooo  hellllllooooooooooooooooooo";

            CGSize fontSize=[strt11 sizeWithFont:font constrainedToSize:contsize lineBreakMode:NSLineBreakByWordWrapping];

            float h=20;
            NSLog(@"re %f",fontSize.height);

            if (fontSize.height>22.0f){
                h=fontSize.height+7.0;
                NSLog(@"heigtaaaaa %f",h);
            }

            [lblcomment setFrame:CGRectMake(55,23,260,h)];

            NSString *strDecodeComment=@""hellllllooooooooooooooooooo  hellllllooooooooooooooooooo  hellllllooooooooooooooooooo";




            [lblcomment setText:strDecodeComment];



            [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
            return cell;
    }

Answer 2

感谢 Rohit 的回答，请找到我的工作代码：

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    NSString *content=((Comment *)[commentsArray objectAtIndex:indexPath.row]).content;
    CGSize maximumLabelSize = CGSizeMake(234.00f, FLT_MAX);
    CGRect expectedLabelRect = [content boundingRectWithSize:maximumLabelSize options:NSStringDrawingUsesLineFragmentOrigin attributes:nil context:nil];

    if (expectedLabelRect.size.height > 41) {
        return expectedLabelRect.size.height + 81;
    }
    else
        return 81;
}