由于模糊事件仅在字段级别上有效，因此您需要从中删除第一个
handleBlur，
Formik并在Field元素中执行以下操作：
<Field component={MyInput} name="email" type="email" onBlur={e => { // call the built-in handleBur handleBlur(e) // and do something about e let somevalue = e.currentTarget.value ... }}/>参见https://github.com/jaredpalmer/formik/issues/157
