Question

我对React-redux应用程序开发很新，我试图了解如何在页面加载后立即发送另一个操作。以下是我的容器代码。我正在使用这个（https://github.com/jpsierens/webpack-react-redux）样板。

let locationSearch;

const ActivationPage = ({activateUser}) => {
    return (
        <div className="container">
          <h2>Activation Required</h2>
          <p>An Activation Email was sent to your email address. Please check your inbox to find the activation link</p>
          { activateUser() }
        </div>
    );
};


ActivationPage.propTypes = {
    activateUser: PropTypes.func
};


const mapStateToProps = (state) => {
    return {
        message: state.message,
        currentUser: state.currentUser,
        request: state.request
    };
};

const mapDispatchToProps = (dispatch) => {
    return {
        activateUser: () => {
            console.log(location);
            if (location.search !== '') {
                locationSearch = querystring.parse(location.search.replace('?', ''));
                console.log(locationSearch);
                if (locationSearch.hasOwnProperty('user_id') && locationSearch.hasOwnProperty('activation_code')) {
                    // change request state to pending to show loader
                    dispatch(actions.requestActions.requestPending());

                }
            }
        }
    };
};

export default connect(
    mapStateToProps,
    mapDispatchToProps
)(ActivationPage);

此代码为我提供了警告：setState（...）：在现有状态转换期间无法更新，可能是因为我在渲染功能（IDK）期间调度了一个动作。如何在页面加载后自动转换给定代码以自动触发activateUser（）函数。

Answer 1

https://facebook.github.io/react/docs/react-component.html

componentWillMount()和componentDidMount()为您服务。我的意见 - 你应该避免使用componentWillMount而更喜欢componentDidMount - 如果你将使用服务器渲染，这是有意义的

Answer 2

在我将组件转换为class之后让它工作extends Component这个答案在这里帮助了我一些概念 How do you mix componentDidMount() with react-redux connect()? 以下是那些可能会像我一样对此感到困惑的人的实施。

import React, { Component, PropTypes } from 'react';
import { connect } from 'react-redux';
import actions from '../actions';

let locationSearch;

class ActivationPage extends Component {
    constructor(props) {
        super(props);
    }

    componentDidMount() {
        this.props.activateUser();
    }

    render() {
        return (
        <div className="container">
           <h2>Activation Required</h2>
           <p>An Activation Email was sent to your email address. Please check your inbox to find the activation link</p>
        </div>
        );
    }
}

ActivationPage.propTypes = {
    activateUser: PropTypes.func
};

const mapStateToProps = (state) => {
    return {
        request: state.request
    };
};

const mapDispatchToProps = (dispatch) => {
    return {
        activateUser: () => {
            if (location.search !== '') {
                locationSearch = querystring.parse(location.search.replace('?', ''));
                if (locationSearch.hasOwnProperty('user_id') && locationSearch.hasOwnProperty('activation_code')) {
                    // change request state to pending to show loader
                    dispatch(actions.requestActions.requestPending());
                }
             }
        }
    };
};

export default connect(
    mapStateToProps,
    mapDispatchToProps
)(ActivationPage);

在渲染容器

2 个答案: