ios – 根据自定义单元格增加主tableview行高

首先,在cellForRowATindexPath中创建标签和图像视图：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowATindexPath:(NSIndexPath *)indexPath
{
            /// Set Text Label

            UILabel *lbl_myText = [[UILabel alloc]initWithFrame:CGRectZero];
            [lbl_myText setLineBreakmode:NSLineBreakByWordWrapping];
            lbl_myText.minimumScaleFactor = FONT_SIZE;
            [lbl_myText setnumberOfLines:0];
            lbl_myText.textAlignment = NSTextAlignmentLeft;
            [lbl_myText setFont:[UIFont systemFontOfSize:FONT_SIZE]];

            NSString *text = [arr_text objectATindex:indexPath.row];

            CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE]];

            // checks if text is multi-line
            if (size.width > lbl_myText.bounds.size.width)
            {
                CGSize consTraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2),20000.0f); //// Here Width = Width you want to define for the label in its frame. The height of the label will be adjusted according to this.

                //CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] consTrainedToSize:consTraint lineBreakmode:NSLineBreakByWordWrapping];

                NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

                paragraphStyle.lineBreakmode = NSLineBreakByWordWrapping;


                CGRect textRect = [text boundingRectWithSize:consTraint
                                                     options:NSStringDrawingUsesLineFragmentOrigin
                                                  attributes:@{NSFontAttributename:[UIFont systemFontOfSize:FONT_SIZE],NSParagraphStyleAttributename: paragraphStyle.copy}
                                                     context:nil];

                CGSize size = textRect.size;

                [lbl_myText setText:text];
                [lbl_myText setFrame:CGRectMake(cell.imgv_someoneImage.frame.size.width+8,CELL_CONTENT_MARGIN,CELL_CONTENT_WIDTH - cell.imgv_someoneImage.frame.size.width -(CELL_CONTENT_MARGIN * 2),MAX(size.height,44.0f))];
            }

            else
            {
                lbl_myText.frame = CGRectMake(10,cell.frame.size.width - cell.imgv_someoneImage.frame.size.width - 18,18);
                lbl_myText.textAlignment = NSTextAlignmentLeft;
                [lbl_myText setText:text];
            }

            //lbl_myText.BACkgroundColor = [UIColor greenColor];

            [cell.contentView addSubview:lbl_myText];

            /// Set Date Label

            NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
            [formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
            NSString *StringFromDate = [formatter StringFromDate:[arr_date objectATindex:indexPath.row]];

            UILabel *lbl_myDate = [[UILabel alloc]initWithFrame:CGRectMake(cell.imgv_someoneImage.frame.size.width+8,lbl_myText.frame.size.height+10,cell.frame.size.width - cell.imgv_someoneImage.frame.size.width - 10,18)];
            lbl_myDate.text = StringFromDate;
            lbl_myDate.font = [UIFont fontWithName:@"Helvetica Neue" size:13.0];
            lbl_myDate.textColor = [UIColor lightGrayColor];
            lbl_myDate.textAlignment = NSTextAlignmentLeft;
            [cell.contentView addSubview:lbl_myDate];

            /// Set User Image

            UIImageView *imgv_myImage = [[UIImageView alloc]initWithFrame:CGRectMake(0,lbl_myText.frame.origin.y,63,63)];
            imgv_myImage.image = SELEctedUserUploadedImage;

            [cell.contentView addSubview:imgv_myImage];
}

这里定义一些常量：

#define FONT_SIZE 15.0f
#define CELL_CONTENT_WIDTH 320.0f /// change this according to your screen size. This is just an example
#define CELL_CONTENT_MARGIN 10.0f

现在,在创建标签之后,您必须在heightForRowATindexPath中确定单元格的高度：

- (CGFloat)tableView:(UITableView *)tableView heightForRowATindexPath:(NSIndexPath *)indexPath
{
    NSString *cellText = [arr_text objectATindex:indexPath.row];

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
    NSString *cellDate = [formatter StringFromDate:[arr_date objectATindex:indexPath.row]];

   // NSString *text = [items objectATindex:[indexPath row]];

    CGSize consTraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2),20000.0f);

    //CGSize labelsize = [cellText sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] consTrainedToSize:consTraint lineBreakmode:NSLineBreakByWordWrapping];

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    paragraphStyle.lineBreakmode = NSLineBreakByWordWrapping;

    ////for message label
    CGRect textRect = [cellText boundingRectWithSize:consTraint
                                         options:NSStringDrawingUsesLineFragmentOrigin
                                      attributes:@{NSFontAttributename:[UIFont systemFontOfSize:FONT_SIZE],NSParagraphStyleAttributename: paragraphStyle.copy}
                                         context:nil];

    CGSize labelsize = textRect.size;

    ////for date label
    CGRect datetextRect = [cellDate boundingRectWithSize:consTraint
                                             options:NSStringDrawingUsesLineFragmentOrigin
                                          attributes:@{NSFontAttributename:[UIFont systemFontOfSize:FONT_SIZE],NSParagraphStyleAttributename: paragraphStyle.copy}
                                             context:nil];

    CGSize datelabelsize = datetextRect.size;


    //CGSize datelabelsize = [cellDate sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] consTrainedToSize:consTraint lineBreakmode:NSLineBreakByWordWrapping];

    ///combine the height
    CGFloat height = MAX(labelsize.height + datelabelsize.height,64.0f);

    if(height == 64.0f)
    {
       return 74; /// label is of one line,return original/ static height of the cell
    }

    else
    {
        return height + 10; /// label is of multi-line,return calculated height of the cell + some buffer height 
    }

}