正则校验：校验只能输入数字且首位不能是0

try {
        // 移除所有非数字字符
        let cleaned = this.number.toString().replace(/\D/g, '');

        // 处理前导零：如果长度大于1，则去除开头的零
        if (cleaned.length > 1) {
          cleaned = cleaned.replace(/^0+/, '') || '0';
        }

        this.number = cleaned;
      } catch (e) {
        this.number = '';
      }