使用ant desgin 過程中 會遇到輸入金額的情況，話不多說上代碼

<Form.Item label='原價'>
  {getFieldDecorator('prices', {
    rules: [
      {
        required: true,
        pattern: new RegExp(/^(([1-9]\d*)|\d)(\.\d{1,2})?$/, 'g'),  // 只能輸入數(shù)字跟小數(shù)點 兩位小數(shù)
        message: '請輸入正確的金額'
      }
    ],
    getValueFromEvent: (event) => {
      return event.target.value.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3')  // 只能輸入兩位小數(shù)
    }
  })(
    <Input
      placeholder='請輸入'
      type='number'
    />
  )}
</Form.Item>