iOS约束冲突问题

在TableViewCell自适应高度的时候，报一大堆约束冲突错误，可尝试调整最后一个试图对cell的约束级别

[self.line mas_remakeConstraints:^(MASConstraintMaker *make) {
                make.left.mas_equalTo(self).offset(12);
                make.right.mas_equalTo(self).offset(-12);
                make.top.mas_equalTo(self.authorIcon.mas_bottom).offset(15);
                make.height.mas_equalTo(0.5);
                make.bottom.mas_equalTo(self).priority(500);
 }];