const validateInput = () => {
      if (props.rules) {
        const allPassed = props.rules.every(rule => {
          let passed = true
          inputRef.message = rule.message
          switch (rule.type) {
            case 'required':
              passed = (inputRef.val.trim() !== '')
              break
            case 'email':
              passed = emailReg.test(inputRef.val)
              break
            case 'custom':
              passed = rule.validator ? rule.validator() : true
              break
            default:
              break
          }
          return passed
        })
        inputRef.error = !allPassed
        return allPassed
      }
      return true
    }

老师这个函数会遍历传入的rule数组的所有type值，那会不会造成一个表单项被多个验证规则验证，比如有一个用户名和邮箱的表单，执行以上函数会不会让用户名也一定要满足邮箱的格式呢？