原生的UITableViewCell高度自適應，textLabel自動換行顯示

/*
 * 設置子項cell
 **/
- (UITableViewCell *)getChildCell:(UITableView *)tableView and:(NSIndexPath *)indexPath {
    CourseWareModel * childModel = [self isChild:indexPath];
    UITableViewCell * cell;
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
    }
    //設置Cell不可點擊
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    cell.textLabel.text = childModel.courseWareName;
    cell.textLabel.font = [UIFont systemFontOfSize:14];
    cell.textLabel.textColor = [PlistResourceUtil getColor:@"courselist_name"];
    cell.textLabel.numberOfLines = 0;
    cell.textLabel.lineBreakMode = NSLineBreakByWordWrapping;
    //顯示最右邊的箭頭
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    
    //獲得當前cell高度
    CGRect frame = [cell frame];
    //設置label的最大行數
    cell.textLabel.numberOfLines = 10;
    CGSize size = CGSizeMake(300, 1000);
    CGSize labelSize = [cell.textLabel.text sizeWithFont:cell.textLabel.font constrainedToSize:size lineBreakMode:NSLineBreakByClipping];
    cell.textLabel.frame = CGRectMake(cell.textLabel.frame.origin.x, cell.textLabel.frame.origin.y,labelSize.width, labelSize.height);
    //計算出自適應的高度
    frame.size.height = labelSize.height+16;
    cell.frame = frame;
    
    return cell;
}

然后在heightForRowAtIndexPath方法中返回cell的height

#pragma mark - 大小樣式設置
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    if ([self isGroup:indexPath]) {
        CourseGroupCell * cell = [self getGroupCell:tableView and:indexPath];
        CGFloat height = cell.frame.size.height;
        return height;
//        return 48;   // 分組高
    }
    UITableViewCell * cell = [self getChildCell:tableView and:indexPath];
    CGFloat height = cell.frame.size.height;
    return height;
//    return 40;       // 行高
}