Masonry_设置比例

        [self.bgView addSubview:self.progressImageView];
        [self.progressImageView mas_makeConstraints:^(MASConstraintMaker *make) {

            make.left.mas_equalTo(self.nameLabel.mas_right).with.offset(10);
            make.centerY.mas_equalTo(self.iconImageView);
            make.width.mas_equalTo(self.progressBgView).multipliedBy(1);
            make.height.mas_equalTo(3);
        }];

使用 multipliedBy 设置一个控件的宽是另一个宽的倍数