Reactjs 如何防止react父组件加载

我正在使用react构建我的应用程序，在post组件上，还有3个子组件在传递post道具时在地图函数中被调用

在列表组件上，当用户单击like按钮时，帖子倾向于重新加载，这不是我想要的

这是我的后父组件：

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';

class Posts extends Component {

    constructor(props) {
        super(props)

        this.state = {
            sidebaropen: false,
            test: '',
            posts: []
        }
    }


    componentWillReceiveProps(nextProps) {

        if (nextProps.post.posts.length > 0) {

            this.setState({ posts: nextProps.post.posts })
            console.log('updated')
        }
    }

    componentDidMount() {
        this.props.getPosts();

        socket.on('posts', data => {
            console.log("resiving :" + JSON.stringify(data))
            if (Object.keys(this.state.posts).length > 0 && Object.keys(data).length >
                0) {

                this.setState({ posts: [data[0], ...this.state.posts] })
            } else {
                this.setState({ posts: data })
            }


        })

        socket.on('id', data => {
            console.log(data)

        })
        console.log('mounted post')
    }
}
render(){

    const { loading } = this.props.post;
    const { posts, } = this.state;
    let closebtn
    let postContent;

    if (posts === null || loading) {
        postContent = <Spinner />;
    } else {
        postContent = <PostFeeds posts={ posts } />;
    }
    if (this.state.sidebaropen) {

        closebtn = <button className='close-toggle-btn' onClick =
            { this.closetoggleclickhandle } />
      }

    return (

        <div className= "post_wrapper" >
        <Postsidebar show={ this.state.sidebaropen } />
            < div className = "" >
                { postContent }
                < /div>
    { closebtn }

    <TiPlus className='creat-post-toggle-btn icons'  onClick =
        { this.toggleclickhandle } />
        </div>
      )
}
     }

Posts.propTypes = {
    getPosts: PropTypes.func.isRequired,
    post: PropTypes.object.isRequired
}

const mapStateToProps = state => ({
    post: state.post
})

export default connect(mapStateToProps, { getPosts })(Posts);

这是第一个子组件

import React, { Component } from 'react';

import PostItem from './PostItem';

class PostFeeds extends Component {


    componentDidMount() {
        //this.setState({ test : 'mounted'})
        console.log('mounted feed')

    }
    render() {

        const { posts } = this.props;
        //console.log(posts)
        return posts.map(post => <PostItem key={ post._id } post = { post } />);

    }
}

positem.js有点粗糙

import React, {Component} from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { Link } from 'react-router-dom';
import { deletePost, addLike, removeLike, bookmark } from "../../actions/postsActions";
import Postimg from './Postimg';
import {  MdBookmarkBorder ,/**MdBookmark */} from "react-icons/md";
import {AiFillDislike, AiOutlineLike, AiFillDownSquare} from 'react-icons/ai'
import { TiHeartOutline, TiHeartFullOutline, TiMessage,  TiDelete } from "react-icons/ti";


class PostItem extends Component {
  onDeleteClick(id){
    this.props.deletePost(id);

  }
  componentWillMount() {
    console.log( 'mounted item')
    //console.log(window.scrollTo(0, localStorage.getItem('scrollpossition')))
  }
  onLikeClick(id){
    this.props.addLike(id);
   // window.scrollTo(0, localStorage.getItem('scrollpossition'))
    window.location.href = '/feed'
  }
  onUnlikeClick(id){
    this.props.removeLike(id);
   // window.scrollTo(0, localStorage.getItem('scrollpossition'))
    window.location.href = '/feed'
  }
  findUserLike(likes) {
    const { auth } = this.props;
    if(likes.length > 0){
      if(likes.filter(like => like.user === auth.user.id).length > 0) {
        return true;
      } else {
        return false;
      }
    }
  }
  findUserDislike(dislikes) {
    const { auth } = this.props;
    if(dislikes.length > 0){
      if(dislikes.filter(dislike => dislike.user === auth.user.id).length > 0) {
        return true;
      } else {
        return false;
      }
    }
  }
  onBookmark (id){
    this.props.bookmark(id)
  }
  render() {

    const { post, auth, showActions } = this.props;
    let ifAlreadyliked;
    let ifAlreadydisliked;
    let postimg;
    let postText;
    let profileimg
    let topic = ''

    if(post.user)
    {
       if(post.user.profileImageData){
        profileimg =  <Link to={`/profile/${post.profile.handle}`}><img src={post.profile.profileImageData} alt=''  /></Link> 

       }else{
        profileimg =  <img src='/assets/images/user-4.png' alt='pip'  />
       }
      if(this.findUserLike(post.likes)){
        ifAlreadyliked =  <TiHeartFullOutline className= 'icons like-color'/>
      }else{
        ifAlreadyliked =  <TiHeartOutline className= 'icons'/>
      }
      if(this.findUserDislike(post.dislikes)){
        ifAlreadydisliked =  <AiFillDislike className= 'icons yellow'/>
      }else{
        ifAlreadydisliked =  <AiOutlineLike  className= 'icons'   onClick={this.onUnlikeClick.bind(this, post._id)}/>
      }
     }
     if(post.Topic){
     topic =  <div className= ''><small><b style={{color:'#ff8d00'}}>< AiFillDownSquare />{post.Topic}</b></small></div>
    }
      if(post.postImageData !== '' && post.postImageData !== null && post.postImageData !== undefined)
      {
      postimg = <Postimg imageSrc = {post.postImageData} imgAlt = {''}/>

      }
      if(post.text !== '' || post.text === null)
      {
      postText =  <div className='feed_text'>{post.text}</div>
      }


    return (

        <div className="feed_card">
          <div className="feed_header">
          <div className="feed-profile-img">{profileimg}</div>
            <div className="feed-handle-text">{post.name}</div>

            <div className='v-spacer'/>
            <div className="time-stamp"><small>{new Date (post.date).toLocaleString ('en-US', {hour: 'numeric', hour12: true, minute: 'numeric', month: 'long', day: 'numeric' } )} </small></div>

          </div>
          <div className="feed-body-container">
         <div>
              {topic}
              {postimg}
              {postText}
              <div className='mini_feed_footer'>
                <small>{post.likes.length} likes. {post.comments.length} comments. {post.dislikes.length} dislikes.</small>
              </div>
            { showActions ? (
                  <div className='feed_footer'>

                    <div onClick={this.onLikeClick.bind(this, post._id)} type="button" className="btn btn-light mr-1">
                          <div className='feed-icon-mini-container'>
                            {ifAlreadyliked}
                          </div>
                    </div>

                    <div className='spacer'/>

                    {ifAlreadydisliked}


                    <div className='spacer'/>

                    <Link to={`/post/${post._id}`} className='header-brand'>
                      <TiMessage className='icons'/>
                    </Link>

                    <div className='spacer'/>
                      { post.user === auth.user.id ? (

                        <TiDelete
                          onClick={this.onDeleteClick.bind(this, post._id)}
                          className="icons red"
                        />

                    ) :  <MdBookmarkBorder
                        onClick={this.onBookmark.bind(this, post._id)}
                        className="icons blue"
                      /> }

            </div>) : null}

          </div>
          </div>
        </div>

    );
  }
}
PostItem.defaultProps = {
  showActions: true
}

PostItem.propTypes = {
  post: PropTypes.object.isRequired,
  auth: PropTypes.object.isRequired,
  deletePost: PropTypes.func.isRequired,
  addLike:PropTypes.func.isRequired,
  removeLike:PropTypes.func.isRequired,
  bookmark:PropTypes.func.isRequired
};

const mapStateToProps = state => ({
  auth: state.auth
})

export default connect(mapStateToProps, {deletePost, addLike,bookmark, removeLike})(PostItem);

---

不要将窗口对象用于导航专业，因为这会导致重新加载。使你的处理程序箭头函数变小

onLikeClick = id => {
   this.props.addLike(id);
   // window.scrollTo(0, localStorage.getItem('scrollpossition'))
   this.props.history.push("/feed");
};

onUnlikeClick = id => {
   this.props.removeLike(id);
   // window.scrollTo(0, localStorage.getItem('scrollpossition'))
   this.props.history.push("/feed");
};

---

另外，如果/feed是同一页，则将其全部删除，无需重新加载。

为什么不希望重新加载父组件？如果不重新加载，则两个子项都不会重新加载。问题是每次渲染时都会重新分配后内容，因此如果没有任何更改，这将重新渲染，因为每次重新渲染时后内容对象引用都会不同，因此react认为状态为react比较浅。是否有任何可能的方法它？？但是当一篇文章被删除时，它不会重新呈现。请显示完整的代码，PostItem有问题。我尝试过这个，但仍然是同一个问题。我只是将cod从父组件更新到最后一个不起作用的组件，我尝试过对它进行注释。即使没有任何声明，组件仍然会重新加载