將Dispatch傳遞給onClick事件Redux

Question

我正在深入研究我的第一個react / redux應用程序，並且在將我的調度操作映射到組件中的onClick事件時遇到了一些麻煩。

我嘗試了幾種嘗試將onClick事件綁定到調度的變體，但我總是最終得到：

ReferenceError: onMovieClick is not defined

或者當我最終正確綁定一個函數時，我將得到一個與dispatch is not defined相關的錯誤dispatch is not defined 。

我的目標我正在嘗試從商店功能實現過濾（刪除）

動作/ movieActions.js

import * as actionTypes from './actionTypes'

export const createMovie = (movie) => {
  return {
    type: actionTypes.CREATE_MOVIE,
    movie
  }
};

export const deleteMovie = (id) => {
  console.log('action triggered. movie index:' + id)
  return {
    type: actionTypes.DELETE_MOVIE,
    id
  }
}

減速器/ movieReducers.js

export default (state = [], action) => {
  switch (action.type){
    case 'CREATE_MOVIE':
      return [
        ...state,
        Object.assign({}, action.movie)
      ];
    case 'DELETE_MOVIE':
      return [
        state.filter(({ id }) => id  !== action.id)
      ]
    default:
          return state;
  }
};

組件/ MovieList.js

import React from 'react'
import Slider from 'react-slick'
import { dispatch, connect } from 'react-redux'
import {Icon} from 'react-fa'
import { deleteMovie } from '../../actions/movieActions'

import 'slick-carousel/slick/slick.css'
import 'slick-carousel/slick/slick-theme.css'
import './MovieList.scss'

class MovieList extends React.Component{
  constructor(props){
    super (props)
  }

  handleClick(id) {
    dispatch(deleteMovie(id))
  }

  onMovieClick(id){
   dispatch.deleteMovie(id)
  }

  render () {
    // Settings for slick-carousel
    let settings = {
      infinite: true,
      speed: 500
    }

    return (
      <div className='col-lg-12'>
        {this.props.movies.map((b, i) =>
          <div key={i} className="col-lg-2">
            <Slider {...settings}>
              {b.images.map((b, z) =>
                <div className="img-wrapper">
                  <Icon name="trash" className="trash-icon" onClick={() =>
                    console.log(this.props.movies[i].id),
                    onMovieClick(this.props.movies[i].id)
                  }/>
                  <img className="img-responsive" key={z} src={b.base64}></img>
                </div>
              )}
            </Slider>
            <div className="text-left info">
              <h2>{b.title}</h2>
              <p>{b.genre}</p>
            </div>
          </div>
        )}
      </div>
    )
  }
}

// map state from store to props

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

// Map actions to props
const mapDispatchToProps = (dispatch) => {
  return {
    onMovieClick: (id) => {
      dispatch(deleteMovie(id))
    }
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(MovieList)

如果有人有時間，會喜歡一些建議。

Answer 1

由於您通過connect傳遞了MovieClick，您實際上可以從MovieList組件中調用它。 首先，我將刪除MovieList組件中的onMovieClick方法定義，然后在Icon的onclick處理程序中使用this.props.onMovieClick ，如下所示：

 <Icon name="trash" className="trash-icon" onClick={() => console.log(this.props.movies[i].id), this.props.onMovieClick(this.props.movies[i].id) }/>