reactjs - React Formik在<Formik/>之外使用SubmitForm

当前行为

<Formik
    isInitialValid
    initialValues={{ first_name: 'Test', email: '[email protected]' }}
    validate={validate}
    ref={node => (this.form = node)}
    onSubmitCallback={this.onSubmitCallback}
    render={formProps => {
        const fieldProps = { formProps, margin: 'normal', fullWidth: true, };
        const {values} = formProps;
        return (
            <Fragment>
                <form noValidate>
                    <TextField
                        {...fieldProps}
                        required
                        autoFocus
                        value={values.first_name}
                        type="text"
                        name="first_name"

                    />

                    <TextField
                        {...fieldProps}
                        name="last_name"
                        type="text"
                    />

                    <TextField
                        {...fieldProps}
                        required
                        name="email"
                        type="email"
                        value={values.email}

                    />
                </form>
                <Button onClick={this.onClick}>Login</Button>
            </Fragment>
        );
    }}
/>

我正在尝试此解决方案https://github.com/jaredpalmer/formik/issues/73#issuecomment-317169770，但它总是返回我Uncaught TypeError: _this.props.onSubmit is not a function

当我尝试console.log(this.form)时，有submitForm函数。

有解决方案的人吗？




-Formik版本：最新
-React版本：v16
-作业系统：Mac OS

最佳答案

您可以将formikProps.submitForm（以编程方式提交）以绑定到父组件，然后触发父组件的提交：

import React from 'react';
import { Formik } from 'formik';

class MyForm extends React.Component {
    render() {
        const { bindSubmitForm } = this.props;
        return (
            <Formik
                initialValues={{ a: '' }}
                onSubmit={(values, { setSubmitting }) => {
                    console.log({ values });
                    setSubmitting(false);
                }}
            >
                {(formikProps) => {
                    const { values, handleChange, handleBlur, handleSubmit } = formikProps;

                    // bind the submission handler remotely
                    bindSubmitForm(formikProps.submitForm);

                    return (
                        <form noValidate onSubmit={handleSubmit}>
                            <input type="text" name="a" value={values.a} onChange={handleChange} onBlur={handleBlur} />
                        </form>
                    )
                }}
            </Formik>
        )
    }
}

class MyApp extends React.Component {

    // will hold access to formikProps.submitForm, to trigger form submission outside of the form
    submitMyForm = null;

    handleSubmitMyForm = (e) => {
        if (this.submitMyForm) {
            this.submitMyForm(e);
        }
    };
    bindSubmitForm = (submitForm) => {
        this.submitMyForm = submitForm;
    };
    render() {
        return (
            <div>
                <button onClick={this.handleSubmitMyForm}>Submit from outside</button>
                <MyForm bindSubmitForm={this.bindSubmitForm} />
            </div>
        )
    }
}

export default MyApp;

关于reactjs - React Formik在<Formik/>之外使用SubmitForm，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/49525057/