Javascript 如何使用react redux配置mapDispatchToProps？

下面是我的容器代码：

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

export class Container extends Component {
  componentDidMount() {
    this.props.fetchMovies();
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

function mapDispatchToProps(dispatch) {
  return {
    fetchMovies: bindActionCreators({fetchMovies}, dispatch),
  };
}

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

export const fetchMovies = () => dispatch => {
  console.log('fetchMovies called');
  // const movieResponse = fetchAPI(apiUrl);
  // console.log('movieResponse => ', JSON.stringify(movieResponse));
  dispatch({ type: actionTypes.FETCH_MOVIES, payload: [] });
};

import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from '../rootReducer';

const middlewares = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middlewares))
);

export default store;

"prop-types": "^15.7.2",
"react": "^16.8.6",
"react-bootstrap": "^1.0.0-beta.11",
"react-dom": "^16.8.6",
"react-flexbox-grid": "^2.1.2",
"react-redux": "^7.1.0",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"redux": "^4.0.4",
"redux-actions": "^2.6.5",
"redux-promise-middleware": "^6.1.1",
"redux-thunk": "^2.3.0",

---

行动：

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

export class Container extends Component {
  componentDidMount() {
    this.props.fetchMovies();
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

function mapDispatchToProps(dispatch) {
  return {
    fetchMovies: bindActionCreators({fetchMovies}, dispatch),
  };
}

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

export const fetchMovies = () => dispatch => {
  console.log('fetchMovies called');
  // const movieResponse = fetchAPI(apiUrl);
  // console.log('movieResponse => ', JSON.stringify(movieResponse));
  dispatch({ type: actionTypes.FETCH_MOVIES, payload: [] });
};

import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from '../rootReducer';

const middlewares = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middlewares))
);

export default store;

"prop-types": "^15.7.2",
"react": "^16.8.6",
"react-bootstrap": "^1.0.0-beta.11",
"react-dom": "^16.8.6",
"react-flexbox-grid": "^2.1.2",
"react-redux": "^7.1.0",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"redux": "^4.0.4",
"redux-actions": "^2.6.5",
"redux-promise-middleware": "^6.1.1",
"redux-thunk": "^2.3.0",

---

商店：

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

export class Container extends Component {
  componentDidMount() {
    this.props.fetchMovies();
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

function mapDispatchToProps(dispatch) {
  return {
    fetchMovies: bindActionCreators({fetchMovies}, dispatch),
  };
}

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

export const fetchMovies = () => dispatch => {
  console.log('fetchMovies called');
  // const movieResponse = fetchAPI(apiUrl);
  // console.log('movieResponse => ', JSON.stringify(movieResponse));
  dispatch({ type: actionTypes.FETCH_MOVIES, payload: [] });
};

import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from '../rootReducer';

const middlewares = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middlewares))
);

export default store;

"prop-types": "^15.7.2",
"react": "^16.8.6",
"react-bootstrap": "^1.0.0-beta.11",
"react-dom": "^16.8.6",
"react-flexbox-grid": "^2.1.2",
"react-redux": "^7.1.0",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"redux": "^4.0.4",
"redux-actions": "^2.6.5",
"redux-promise-middleware": "^6.1.1",
"redux-thunk": "^2.3.0",

---

依赖项版本：

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

export class Container extends Component {
  componentDidMount() {
    this.props.fetchMovies();
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

function mapDispatchToProps(dispatch) {
  return {
    fetchMovies: bindActionCreators({fetchMovies}, dispatch),
  };
}

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

export const fetchMovies = () => dispatch => {
  console.log('fetchMovies called');
  // const movieResponse = fetchAPI(apiUrl);
  // console.log('movieResponse => ', JSON.stringify(movieResponse));
  dispatch({ type: actionTypes.FETCH_MOVIES, payload: [] });
};

import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from '../rootReducer';

const middlewares = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middlewares))
);

export default store;

"prop-types": "^15.7.2",
"react": "^16.8.6",
"react-bootstrap": "^1.0.0-beta.11",
"react-dom": "^16.8.6",
"react-flexbox-grid": "^2.1.2",
"react-redux": "^7.1.0",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"redux": "^4.0.4",
"redux-actions": "^2.6.5",
"redux-promise-middleware": "^6.1.1",
"redux-thunk": "^2.3.0",

---

获取错误：

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

export class Container extends Component {
  componentDidMount() {
    this.props.fetchMovies();
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

function mapDispatchToProps(dispatch) {
  return {
    fetchMovies: bindActionCreators({fetchMovies}, dispatch),
  };
}

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

export const fetchMovies = () => dispatch => {
  console.log('fetchMovies called');
  // const movieResponse = fetchAPI(apiUrl);
  // console.log('movieResponse => ', JSON.stringify(movieResponse));
  dispatch({ type: actionTypes.FETCH_MOVIES, payload: [] });
};

import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from '../rootReducer';

const middlewares = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middlewares))
);

export default store;

"prop-types": "^15.7.2",
"react": "^16.8.6",
"react-bootstrap": "^1.0.0-beta.11",
"react-dom": "^16.8.6",
"react-flexbox-grid": "^2.1.2",
"react-redux": "^7.1.0",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"redux": "^4.0.4",
"redux-actions": "^2.6.5",
"redux-promise-middleware": "^6.1.1",
"redux-thunk": "^2.3.0",

---

TypeError:this.props.fetchMovies不是一个函数

---

我使用的是16.8的最新版本。这就是原因吗？或者我在配置中遗漏了什么？

您使用bindActionCreators时出错了。它将对象作为第一个参数。对象的属性是动作创建者本身

---

并像mapDispatchToProps一样返回一个对象

---

这可能有用

function mapDispatchToProps(dispatch) {
  return bindActionCreators({ fetchMovies }, dispatch)
}

---

或者您可能根本不使用bindActionCreators

function mapDispatchToProps(dispatch) {
  fetchMovies: () => fetchMovies(dispatch)
}

---

使用bindActionCreators函数时存在轻微的不匹配。像这样试试

const matchDispatchToProps = dispatch => bindActionCreators({
    fetchMovies
}, dispatch)

---

我不使用mapDispatchToProps，我直接使用它，它可以完美地工作

export default connect(
  mapStateToProps,
  { fetchMovies }
)(Container);

---

你可以用两种方法

const mapDispatchToProps = (dispatch) => ({
  fetchMovies: () => dispatch(fetchMovies())
})

---

或

---

另外，请确保您正在导入连接的

容器

import Container from './container'

---

而不是

import { Container } from './container'

---

进一步查看您的代码，您的操作不是一个纯函数，因此它导致了另一个错误。下面是代码的快速示例

您需要这样称呼它：

---

this.props.actions.fetchMovies（）

---

您可能还需要更新mapDispatchToProps方法。我们这样称呼我们的：

const actions = {
 fetchMovies: fetchMoviesActionFunction, // or whatever your function is called here
};

const mapDispatchToProps = dispatch => ({ actions: bindActionCreators(actions, dispatch) });

---

我会走另一条路。我上次与thunk合作已经有一段时间了，但我没有使用类似的方法。看看这种方法是否适合你

export class Container extends Component {
  componentDidMount() {
    this.props.dispatch(fetchMovies());
  }
}

const mapStateToProps = state => {
  return {
    movies: state.movies,
  };
};

export default connect(
  mapStateToProps
)(Container);

---

---

我甚至也试过了，仍然是同一个问题。我已经用MapDispatchForPropsory的完整代码更新了答案，说：不走运：（我也试过，但仍然不走运：（如果我使用这个。props。fetchMovies（）的话，组件中确实挂载了），它抛出了相同的错误。我想知道使用最新的react版本是否是问题所在？请尝试此

fetchMovies:bindActionCreators（fetchMovies，dispatch），

我有相同的代码，稍后更新为object，运气不好：（IIRC bindActionCreators使用dispatch包装函数，因此您将调度它2次。请尝试：export-const-fetchMovies=（）=>{return{type:actionTypes.FETCH_-MOVIES，payload:[]}；}；第二个参数是dispatch only，我认为我在操作中没有做错任何事情。任何备选答案plz？需要工作代码，已经尝试了所有这些，但不幸的是没有工作。这应该可以工作，除非你没有导入连接的

容器
。你能告诉我如何使用
容器吗？应该是
从导入容器…
而不是导入{Container}从…
它在发布的问题中，你可以参考问题吗？不，不是。我在问你如何使用你的
容器。例如：你的
app.js
，它有
。
对，你没有导入连接的redux
容器，也不会有任何来自
redux
的道具。请查看我的更新答案，谢谢演示。这个例子是有Saga还是没有？如何使用Saga？我不想让任何试图回答的人失望，因此我这边投了+1票。但我的问题仍然需要解决，在与提供的演示链接进行比较后联系我（查看我的个人资料），我将尝试解释如何使用Saga。