antd Form中getFieldDecorator校验不能输入空字符和特殊字符

 //校验大于0小于等于99的数
 checkNum = (rule, value, callback) => {
   let x = value -0
   if(x >= 0 && x <= 99){
    let a = new RegExp(/^\d+(\.\d{1,2})?$/)
    if(!a.test(x)){
      return  callback("请保留两位小数");
    }
    return  callback();
   }else{
   return  callback("请输入小于等于99的数并保留两位小数");
  }
}
<Form.Item label="单价：">
              {getFieldDecorator('unitPrice', { 
                  rules: [
                    { validator: this.checkNum },
                    {required: true, message: '请设置单价'},
                    { validator: (rule, value, callback) => {
                      if(value.trim()==""){
                         return callback("请输入非空字符")
                      }else{
                         return callback();
                      }
                   }},
                    { validator: (rule, value, callback) => {
                    let reg =new RegExp("[`~!%@#$^&*()=|{}':;',\\[\\]<>《》/?~！@#￥……&*（）|{}【】‘；：”“'\"。，、？]");
                      if(reg.test(value)){
                         return callback("不能输入该特殊字符")
                      }else{
                         return callback();
                      }
                   }},
                  ],
                  initialValue: rowData?rowData.unitPrice:""
                })(<Input
                    placeholder="请设置单价"
                />)}
            </Form.Item>