Javascript 动作不会触发React+;重演

Javascript 动作不会触发React+;重演,javascript,ios,reactjs,react-native,redux,Javascript,Ios,Reactjs,React Native,Redux,我正在开发一个react redux应用程序,由于某些原因,我调用的操作没有到达reducer(在reducer中,我目前只有一个log语句)。我已附上代码,我觉得是相关的,任何贡献将不胜感激 在组件中的函数内调用的操作: onSearchPressed() { console.log('search pressed'); this.props.addToSaved(); } actions/index.js: var actions = exports = module.ex

我正在开发一个react redux应用程序,由于某些原因,我调用的操作没有到达reducer(在reducer中,我目前只有一个log语句)。我已附上代码,我觉得是相关的,任何贡献将不胜感激

在组件中的函数内调用的操作:

onSearchPressed() {
    console.log('search pressed');
    this.props.addToSaved();
}
actions/index.js:

var actions = exports = module.exports

exports.ADD_SAVED = "ADD_SAVED";

exports.addToSaved = function addToSaved() {
  console.log('got to ADD_SAVED step 2');
  return {
    type: actions.ADD_SAVED
  }
}
const { combineReducers } = require('redux')
const items = require('./items')

const rootReducer = combineReducers({
  items: items
})

module.exports = rootReducer
reducers/items.js:

const {
  ADD_SAVED
} = require('../actions/index')

const initialState = {
    savedList: []
}

module.exports = function items(state = initialState, action) {
    let list

    switch (action.type) {
        case ADD_SAVED:
            console.log('GOT to Step 3');
            return state;
        default:
            console.log('got to default');
            return state;
    }
}
reducers/index.js:

var actions = exports = module.exports

exports.ADD_SAVED = "ADD_SAVED";

exports.addToSaved = function addToSaved() {
  console.log('got to ADD_SAVED step 2');
  return {
    type: actions.ADD_SAVED
  }
}
const { combineReducers } = require('redux')
const items = require('./items')

const rootReducer = combineReducers({
  items: items
})

module.exports = rootReducer
store/configure-store.js:

import { createStore } from 'redux'
import rootReducer from '../reducers'

let store = createStore(rootReducer)
编辑:onSearchPressed的整个组件:

class MainView extends Component {
    onSearchPressed() {
        this.props.addToSaved();
    }
    render() {
        console.log('MainView clicked');
        var property = this.props.property;

        return (
            <View style={styles.container}>
                <Image style={styles.image}
                    source={{uri: property.img_url}} />
                <Text style={styles.description}>{property.summary}</Text>
                <TouchableHighlight style = {styles.button}
                        onPress={this.onSearchPressed.bind(this)}
                        underlayColor='#99d9f4'>
                        <Text style = {styles.buttonText}>Save</Text>
                    </TouchableHighlight>
            </View>
        );
    }
}

module.exports = MainView;
class MainView扩展组件{
onSearchPressed(){
this.props.addToSaved();
}
render(){
log('MainView clicked');
var属性=this.props.property;
返回(
{property.summary}
拯救
);
}
}
module.exports=MainView;

正如Rick Jolly在对您的问题的评论中提到的,您的
onSearchPressed()
函数实际上并没有分派该操作,因为
addToSaved()
只是返回一个操作对象,它不分派任何内容

如果要从组件分派操作,应使用将组件连接到redux。例如:

const { connect } = require('react-redux')

class MainView extends Component {
  onSearchPressed() {
    this.props.dispatchAddToSaved();
  }
  render() {...}
}

const mapDispatchToProps = (dispatch) => {
  return {
    dispatchAddToSaved: () => dispatch(addToSaved())
  }
}

module.exports = connect(null, mapDispatchToProps)(MainView)

有关更多信息,请参阅。

最近我遇到了这样的问题,发现我使用了动作导入,但它必须来自道具。查看toggleAddContactModal的所有用法。在我的例子中,我没有从导致此问题的destructuring语句中获取TogleAddContactModal

import React from 'react'
import ReactDOM from 'react-dom'
import Modal from 'react-modal'
import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'
import {
  fetchContacts,
  addContact,
  toggleAddContactModal
} from '../../modules/contacts'
import ContactList from "../../components/contactList";

Modal.setAppElement('#root')

class Contacts extends React.Component {
  componentDidMount(){
    this.props.fetchContacts();
  }
  render(){
    const {fetchContacts, isFetching, contacts, 
      error, isAdding, addContact, isRegisterModalOpen,
      toggleAddContactModal} = this.props;
    let firstName;
    let lastName;
    const handleAddContact = (e) => {
      e.preventDefault();
      if (!firstName.value.trim() || !lastName.value.trim()) {
        return
      }
      addContact({ firstName : firstName.value, lastName: lastName.value});
    };

    return (
      <div>
        <h1>Contacts</h1>
        <div>
          <button onClick={fetchContacts} disabled={isFetching}>
            Get contacts
          </button>
          <button onClick={toggleAddContactModal}>
            Add contact
          </button>
        </div>
        <Modal isOpen={isRegisterModalOpen} onRequestClose={toggleAddContactModal}>
          <input type="text" name="firstName" placeholder="First name" ref={node =>         
 (firstName = node)} ></input>
      <input type="text" name="lastName" placeholder="Last name" ref={node => 
(lastName = node)} ></input>
          <button onClick={handleAddContact} disabled={isAdding}>
            Save
          </button>
        </Modal>
        <p>{error}</p>
        <p>Total {contacts.length} contacts</p>
        <div>
          <ContactList contacts={contacts} />
        </div>
      </div>
    );
  }
}
const mapStateToProps = ({ contactInfo }) => {
  console.log(contactInfo)
  return ({
    isAdding: contactInfo.isAdding,
    error: contactInfo.error,
    contacts: contactInfo.contacts,
    isFetching: contactInfo.isFetching,
    isRegisterModalOpen: contactInfo.isRegisterModalOpen
  });
}

const mapDispatchToProps = dispatch =>
  bindActionCreators(
    {
      fetchContacts,
      addContact,
      toggleAddContactModal
    },
    dispatch
  )

export default connect(
  mapStateToProps,
  mapDispatchToProps
)(Contacts)
从“React”导入React
从“react dom”导入react dom
从“反应模态”导入模态
从“redux”导入{bindActionCreators}
从“react redux”导入{connect}
进口{
获取联系人,
addContact,
toggleAddContactModal
}来自“..../modules/contacts”
从“../../components/ContactList”导入联系人列表;
Modal.setAppElement(“#根”)
类Contacts扩展React.Component{
componentDidMount(){
this.props.fetchContacts();
}
render(){
const{fetchContacts,isFetching,contacts,
错误,isAdding,addContact,isRegisterModalOpen,
toggleAddContactModal}=this.props;
让我们直呼其名;
让姓;
const handleAddContact=(e)=>{
e、 预防默认值();
如果(!firstName.value.trim()| |!lastName.value.trim()){
返回
}
addContact({firstName:firstName.value,lastName:lastName.value});
};
返回(
联络
取得联系
添加联系人
(firstName=node)}>
(lastName=node)}>
拯救
{错误}

总共{个触点。长度}个触点

); } } 常量mapStateToProps=({contactInfo})=>{ console.log(contactInfo) 返回({ isAdding:contactInfo.isAdding, 错误:contactInfo.error, 联系人:contactInfo.contacts, isFetching:contactInfo.isFetching, isRegisterModalOpen:contactInfo.isRegisterModalOpen }); } const mapDispatchToProps=调度=> bindActionCreators( { 获取联系人, addContact, toggleAddContactModal }, 派遣 ) 导出默认连接( MapStateTops, mapDispatchToProps )(联系人)
检查onSearchPressed()上的console.log(this.props)并确保它不是null@QoPconsole.log(this.props)已正确填充。这太奇怪了!尝试将exports.addToSaved=函数addToSaved(){}更改为exports.addToSaved=函数(){}@QoP仍然只到达操作日志语句,而不是reducer日志语句:\n您没有调度操作<代码>this.props.addToSaved()应该是
this.props.dispatch(addToSaved())我也做过几次同样的事情,但它只是默默地失败了,这让我很恼火。当一个成年人几乎要哭了。。。经过数小时的调试后,会出现分解问题。