Monsary button label 自动改变宽度适应

  self.orderNumLabel = [[UILabel alloc] init];
  self.orderNumLabel.font = Font_s_18;
  self.orderNumLabel.textColor = Color_FFA34C;
  self.orderNumLabel.text = @"0个";
  [self.orderView addSubview:self.orderNumLabel];
  [self.orderNumLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.orderPaidInNumLab);
        make.left.equalTo(self.orderNumTilteLab.mas_right).offset(32);
        make.height.equalTo(@25);
        //不需要设置宽度，因为后面会设置自动适应
  }];
  //自动适应宽度
  [_orderNumLabel setContentHuggingPriority:UILayoutPriorityRequired     forAxis:UILayoutConstraintAxisHorizontal];