输入框不能输入负数

不能输入：负号（-）零开头（0）
正则算法

  formatter = (value) => (`${value.toString().replace(/^(0+)|[^\d]+/g, '')}`)
  parser = (value) => (`${value.toString().replace(/^(0+)|[^\d]+/g, '')}`)

使用

    formatter={this.formatter}
    parser={this.parser}

例：

'use strict'
import React from 'react'
import {
  InputNumber
} from 'antd'
import styles from '../../../../../../assets/Products.scss'
/**
 * edit product SupplierReceiveGoodsDays (供应商到货天数)
 */
export default class ProductEditSupplierReceiveGoodsDays extends React.Component {
  //不能为负数
  formatter = (value) => (`${value.toString().replace(/^(0+)|[^\d]+/g, '')}`)
  parser = (value) => (`${value.toString().replace(/^(0+)|[^\d]+/g, '')}`)
  variationsChangeChildren = (value) => {
    this.props.variationsChangeChildren(value, this.props.record, 'GoodsDays')
  }
  render () {
    const { max, value, disabled } = this.props
    return (
      <div className={styles['input-group-content']}>
        <span className={styles['input-group-addon']}>天</span>
        <InputNumber
          value={value}
          min={0}
          max={max}
          disabled={disabled}
          className={styles['input-number']}
          style={{ width: '140px' }}
          formatter={this.formatter}
          parser={this.parser}
          onChange={this.variationsChangeChildren}
        />
      </div>
    )
  }
}