自动布局又出问题-HPPGCTableViewCell

[self.firstComment mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self.summaryLbl.mas_bottom).offset(commentPadding);
        make.left.equalTo(commentLeftMargin);
    }];

if (feedData.summary.length) {
        [self.firstComment mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.mas_equalTo(self.summaryLbl.mas_bottom).offset(commentPadding);
        }];
    }else {
        [self.firstComment mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.mas_equalTo(self.summaryLbl.mas_bottom).offset(-5);
        }];
    }

上面的写法可以,下面的写法约束就会报错, 而且summaryLb也显示不全,mas_update 只能改值,不能改约束依赖的对象

if (feedData.summary.length) {
        [self.firstComment mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.mas_equalTo(self.summaryLbl.mas_bottom).offset(commentPadding);
        }];
    }else {
        [self.firstComment mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.mas_equalTo(self.likeBtn.mas_bottom).offset(-5);
        }];
    }