javascript - 即使组件已卸载，状态也保持不变

Question

我正在使用 React 和 Draftjs 编写笔记编辑器。我现在遇到的问题是，即使组件被卸载，状态也不会改变，并且在下一次渲染时保持不变。

import React, {useState, useRef, useEffect} from 'react';
import {connect} from "react-redux";
import Proptype from "prop-types";
import Editor from 'draft-js-plugins-editor';
import {EditorState, ContentState} from "draft-js";
import CreateInlineToolbarPlugin from "draft-js-inline-toolbar-plugin";
import CustomInlineToolbar from "./CustomInlineToolbar";
import {updateTitle} from "../redux/action"

import "./NoteDetail.scss";
import 'draft-js-inline-toolbar-plugin/lib/plugin.css';

//TODOS: auto save function (need server)

const InlineToolbarPlugin = CreateInlineToolbarPlugin();
const {InlineToolbar} = InlineToolbarPlugin;

const NoteDetail = ({selectedNote, updateTitle}) => { 
    let {tags, note, _id, title} = selectedNote;
    let [titleState, setTitleState] = useState(title);
    let initContentState = ContentState.createFromText(note);
    let [editorState, setEditorState] = useState(EditorState.createWithContent(initContentState));
    let editorRef = useRef(React.createRef());


    const onContentChange = (state) => {
        setEditorState(state);
    }

    const focus = () => {
        editorRef.current.focus()
    }

    const synTitle = (state) => {
        updateTitle(state)
    }

    useEffect(()=>{
        synTitle(_id, titleState)
    }, [titleState, synTitle, _id])

    useEffect(()=>{
        console.log(titleState, title)
        console.log(editorState.getCurrentContent().getPlainText())
    },[title, editorState, titleState])


    return(
        <div>
            <div className="NoteDetail-container">
                <input type="text" id="title" 
                    value={titleState === "Untitled Page"? "":titleState} 
                    onChange={(e)=>setTitleState(e.target.value)}
                />
                {/* <div id="tags">{renderTags(tags)}</div> */}
                <div id="content" onClick={focus}>
                    <Editor 
                        plugins={[InlineToolbarPlugin]} 
                        onChange={onContentChange}
                        editorState={editorState}
                        ref={ele => editorRef.current = ele}
                    />
                    <CustomInlineToolbar InlineToolbar={InlineToolbar} />
                </div>
            </div>
        </div>
    )
};



export default connect (null, {updateTitle})(NoteDetail)

我使用了 useEffect （第二个）来检查 props 是否正确传递。结果如下：

NoteDetail.js:44 Untitled Page1 (titleState) Untitled Page1 (title)
NoteDetail.js:44 Hi (editorState)
NoteDetail.js:43 Untitled Page1 (titleState) Untitled Page (title)
NoteDetail.js:44 Hi (editorState)

即使道具发生了变化，每次渲染的状态都保持不变。任何人都可以帮忙吗？我会很感激的

标签： javascriptreactjs