根據(jù)約束適配cell高度。不用實現(xiàn)- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 方法

cell.m

- (void)masMake {

    [self.detailLab  mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.contentView);
        make.top.equalTo(self.contentView).offset(leftPadding * 2);
        make.height.mas_equalTo(20);
    }];

    [self.bgView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.detailLab.mas_bottom).offset(leftPadding * 2);
        make.left.equalTo(self.contentView).offset(leftPadding/2.0);
        make.right.equalTo(self.contentView).offset(-leftPadding/2.0);
        make.bottom.equalTo(self.contentView);
        make.height.mas_greaterThanOrEqualTo(20);
    }];
    [self.titleLab mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.contentView).offset(leftPadding);
        make.right.equalTo(self.contentView).offset(-leftPadding);
        make.top.equalTo (self.bgView).offset(leftPadding);
        make.bottom.equalTo(self.imgView.mas_top);
        make.height.mas_greaterThanOrEqualTo(20);
    }];
    //圖片
    [self.imgView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.titleLab);
        make.right.equalTo(self.titleLab);
        make.bottom.equalTo(self.bgView).offset(- leftPadding);
        make.height.mas_greaterThanOrEqualTo(0);
    }];

}

tableView里設置

   _tableView.rowHeight = UITableViewAutomaticDimension;
   _tableView.estimatedRowHeight = 100;