原因：为了保证视图的唯一性，出现了下面的这代码[self.vScrollerView addSubview:cell];

- (void)showConmment:(NSArray *)commentsArray{
    if (!commentsArray ||commentsArray.count == 0) return;
#pragma mark 查看更多的控制需要知道当前多少条总的
    float cellHeight = PCH_BitMap_BY_SIZE(380);
    KapCommentTableViewCell *first;
    for (int i = 0; i<commentsArray.count; i++) {
        KapCommentTableViewCell *cell = [self createdCellByModel:commentsArray[i]];
        [self.vScrollerView addSubview:cell];
        if (!first) {
            [cell mas_makeConstraints:^(MASConstraintMaker *make) {
                make.top.equalTo(self.noneCommentPromptLabel);
                make.left.right.equalTo(self.titleLabel);
                make.height.mas_equalTo(cellHeight);
            }];
        }else{
            [cell mas_makeConstraints:^(MASConstraintMaker *make) {
                make.top.equalTo(first.mas_bottom);
                make.left.right.equalTo(self.titleLabel);
                make.height.mas_equalTo(cellHeight);
            }];
        }
        first = cell;
    }
    [self layoutIfNeeded];
}

- (KapCommentTableViewCell *)createdCellByModel:(id)model{
    KapCommentTableViewCell *cell = [[KapCommentTableViewCell alloc] init];
    cell.userInteractionEnabled = NO;
    cell.headerImageView.image= [UIImage imageNamed:[NSString stringWithFormat:@"header_place_%@",model]];
    return cell;
}

然后调试的时候，虚拟机没问题，真机报44冲突。。。

<NSLayoutConstraint UITableViewCellContentView.height == 44>)

解决方案：(比较low。。猜测原因是init的时候cell给contentview添加了约束导致的。。。)

- (KapCommentTableViewCell *)createdCellByModel:(id)model{
    KapCommentTableViewCell *cell = [[KapCommentTableViewCell alloc] init];
    [cell.contentView mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(cell);
    }];
    cell.userInteractionEnabled = NO;
    cell.headerImageView.image= [UIImage imageNamed:[NSString stringWithFormat:@"header_place_%@",model]];
    return cell;
}

后续：仍然有约束冲突，但是不影响显示..(看起来像是源码给添加了一个高度为95的约束。。。。导致冲突);

(
    "<MASLayoutConstraint:0x1700bf7a0 KapCommentTableViewCell:0x10183ac00.height == 190>",
    "<NSLayoutConstraint:0x1702823a0 KapCommentTableViewCell:0x10183ac00.height == 95>"
)

暂未找到解决方法。。。(下面代码并不能解决。。。。)

[cell mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.top.equalTo(first.mas_bottom);
                make.left.right.equalTo(self.titleLabel);
                make.height.mas_equalTo(cellHeight);
            }];