React + 项目(从基础到实战) -- 第11期

目标

问卷编辑器的开发

设计UI - 拆分布局

水平垂直居中

画布 y方向滚动

自定义问卷组件

后端 返回组件数据

 //获取单个问卷信息

    {

        url: '/api/question/:id',

        method: 'get',

        response: () => {

            return {

                errno: 0,

                data: {

                    id: Random.id(),

                    title: Random.ctitle(),

                    componentList:[

                        //Title

                        {

                            id:Random.id(),

                            type:'questionTitle', //组件类型不能重复,前后端统一

                            title:"标题",

                            props:{

                                text:"问卷标题",

                                level:1,

                                isCenter:false

                            }

                        },

                        //Input

                        {

                            id:Random.id(),

                            type:'questionInput',

                            title:"输入框",

                            props:{

                                title:"输入框",

                                placeholder:"请输入内容",

                            }

                        },

                          //Input2

                          {

                            id:Random.id(),

                            type:'questionInput',

                            title:"输入框2",

                            props:{

                                title:"输入框2",

                                placeholder:"请输入内容2",

                            }

                        }

  
  

                    ]

                }

            }

        }

    },

前端 redux 存储后端返回组件数据

切片

import { createSlice , PayloadAction } from "@reduxjs/toolkit";

import { ComponentPropsType } from "../../components/QuestionComponents";

  
  

//单个组件的信息

export type ComponentInfoType={

    fe_id : string,//为什么下划线

    type : string,

    title: string,

    props:ComponentPropsType

}

  
  

//redux存放组件列表

//1. 定义数据结构

export type ComponentsStateType={

    componentList:Array<ComponentInfoType>,

}

  

//2. 初始化

const INIT_STATE:ComponentsStateType={

    componentList:[],

    //其他扩展

  

}

 export const componentsSlice = createSlice({

     name:"components",

     initialState:INIT_STATE,

     reducers:{

         //重置所有组件

         //看不懂啊老铁!!!!

         resetComponentList:(state: ComponentsStateType , action: PayloadAction<ComponentsStateType>)=>{

             return action.payload

         }

     }

  

 })

  

//导出所有的actions

  

export const {resetComponentList} = componentsSlice.actions

  

export default componentsSlice.reducer

store

import { configureStore } from '@reduxjs/toolkit'

import userReducer, { UserStateType } from './userReducer'

import componentsReducer , {ComponentsStateType}from './componentsReducer'

  
  

export type StateType={

  user : UserStateType,

  components : ComponentsStateType

}

  

export default configureStore({

  reducer: {

    //分模块注册

    user: userReducer, // 存储user数据

    components : componentsReducer// 存储问卷组件列表的数据

    // 存储问卷组件列表的数据

  
  

    // 存储问卷信息数据

  }

})

发请求时存储数据

import { useEffect , useState } from "react";

  

import { useParams } from "react-router-dom";

import { useRequest } from "ahooks";

  

import {useDispatch} from 'react-redux'

import {resetComponentList} from '../store/componentsReducer'

  

//导入发起请求的函数

  

import { getQuestinService } from "../services/question";

  

function useLoadQuestionData() {

    const dispatch = useDispatch()

    const {id = ''} =useParams()

  

   const {data , loading , error , run} = useRequest(

    async (id : string) => {

        if(!id) throw new Error('不存在问卷id')

        const data = await getQuestinService(id)

        return data

    },

    {

        manual: true,

    }

   )

    //根据获取的data 设置redux store

    useEffect(() => {

        if(!data) return

        const {title ='' , componentList = []} = data

  

        //获取到的componentList 存储到 Redux store中

        dispatch(resetComponentList({

            componentList

        }))

  

    },[data])

  
  

    //问卷改变时, 重新加载问卷数据

    useEffect(() => {

        run(id)

    },[id])

  
  

    return {

        loading,

        error,

    }

  
  

}

  
  

export default useLoadQuestionData;

页面画布区域显示组件列表

自定义hook获取数据

import { useSelector } from "react-redux";

import { StateType } from "../store";

import { ComponentsStateType } from "../store/componentsReducer";

  
  

function useGetComponentInfo() {

    //使用useSelector获取store中的数据

    const componens= useSelector<StateType>(state => state.components) as ComponentsStateType

  

    //结构出空数组

    const {componentList = []} = componens

    return {

        componentList

    }

  

}

  

export default useGetComponentInfo;

重构canvas页面

import { FC } from 'react';

import styles from './EditCanvas.module.scss';

//静态展示



import useGetComponentInfo from '../../../hooks/useGetComponentInfo';

import { ComponentInfoType } from '../../../store/componentsReducer';

import { getComponentConfByType } from '../../../components/QuestionComponents';

type PropsType={

  loading : boolean

}

  
  

const EditCanvas: FC<PropsType> = ({loading}) => {

  const {componentList } = useGetComponentInfo();

  

  if(loading){

    return <div>loading</div>

  }

  

  //根据传入的组件 ,

  function getComponent(componetInfo : ComponentInfoType)

  {

    const {type , props} = componetInfo

    //根据组件类型找到对应的组件配置

    const componentConf= getComponentConfByType(type)

    if(!componentConf) return null

   const {Component} = componentConf

  

    return <Component {...props} />

  }

  

  return (

    <div className={styles.canvas}>

  

      {componentList.map(c => {

        const {id} = c

        return (

          <div key={id} className={styles['component-warpper']}>

          <div className={styles.component}>

            {getComponent(c)}

          </div>

        </div>

        )

      })}

      

    </div>

  );

};

  

export default EditCanvas;

点击组件选中效果

添加selectedId,点击时,修改当前选中组件id

import { createSlice , PayloadAction } from "@reduxjs/toolkit";

import { ComponentPropsType } from "../../components/QuestionComponents";

import {produce} from "immer";

  

//单个组件的信息

export type ComponentInfoType={

    // fe_id : string,//为什么是fe_id

    id: string

    type : string,

    title: string,

    props:ComponentPropsType

}

  
  

//redux存放组件列表

//1. 定义数据结构

export type ComponentsStateType={

    componentList:Array<ComponentInfoType>,

    selectedId:string

}

  

//2. 初始化

const INIT_STATE:ComponentsStateType={

    selectedId:'',

    componentList:[],

    //其他扩展

  

}

 export const componentsSlice = createSlice({

     name:"components",

     initialState:INIT_STATE,

     reducers:{

         //1. 重置所有组件

         //看不懂啊老铁!!!!

         resetComponentList:(state: ComponentsStateType , action: PayloadAction<ComponentsStateType>)=>{

             return action.payload

         },

  

         //2.修改选中的组件id

         //使用immer , 改进state不可变数据的写法

         changeSelctedId:produce((state: ComponentsStateType , action: PayloadAction<string>)=>{

             state.selectedId=action.payload

         })

  

     }

  

 })

  

//导出所有的actions

  

export const {resetComponentList} = componentsSlice.actions

  

export default componentsSlice.reducer

页面注册点击事件

 //点击选中组件

 function handleClick(id: string) {

   dispatch(changeSelctedId(id))

 }

点击后改变样式

classsNames css样式的拼接

import classNames from 'classnames'; // 这个是实现css样式的拼接


  {componentList.map(c => {

        const {id} = c

  

        //拼接classname

        const defaultClassName=styles['component-warpper']

        const selectedClassName=styles.selected

        const wrapperClassName = classNames({

          [defaultClassName]: true,

          [selectedClassName]: id === selectedId

        })

  
  

        return (

          <div onClick={()=>{handleClick(id)}} key={id} className={wrapperClassName}>

          <div className={styles.component}>

            {getComponent(c)}

          </div>

        </div>

        )

      })}

点击空白处,取消选中效果

注意这里阻止冒泡的操作

默认初始加载时选择第一个组件

组件库

组件分组

left 布局搭建

选取 组件库中的 tabs组件

又提取出组件 componentlib

显示到组件库

点击,添加组件到画布

画布信息需要更新

画布信息存在Redux中

处理redux

页面中使用

组件属性面板

组件属性的配置

每个组件的属性不一样,单独配置

import React, {FC, useEffect} from "react";

import { QuestionInputPropsType } from "./interface";

//引入组件库

import {Form ,Input} from "antd";

  
  

const PropComponent:FC<QuestionInputPropsType> = (props:QuestionInputPropsType) => {

    const {title , placeholder} = props;

  

    return (

        <div>

            <Form

              layout="vertical"

              initialValues={{ title ,placeholder }}

              >

                 <Form.Item label="标题" name="title" rules={[{ required: true, message: '请输入标题' }]}>

                  <Input />

                 </Form.Item>

                 <Form.Item label="Placeholder" name="placeholder">

                  <Input/>

                 </Form.Item>

  

            </Form>

        </div>

    )

}

  

export default PropComponent;

画布中点击不同的组件时,监听变化,即时显示在右侧属性栏

组件配置中引入属性配置

属性面板显示组件属性

根据selectedID面板显示组件属性

onchange改变组件属性时,同步到Redux Store

改变组件属性时,统一交给上层的componentProops管理

在redux store 中增加修改属性的方法

头部编辑栏

定义组件

页面中引入

import React , {FC} from "react";

import styles from "./EditHeader.module.scss";

import {

    Button,

    Space,

    Typography,

}from 'antd';

import { LeftOutlined } from "@ant-design/icons";

import { useNavigate } from "react-router-dom";

  

const {Title} = Typography;

  

const EditHeader:FC = ()=>{

    const nav = useNavigate()

    return (

        <div className={styles['header-wrapper']}>

          <div className={styles.header}>

            <div className={styles.left}>

                <Space>

                    <Button type="link" icon={<LeftOutlined></LeftOutlined>} onClick={()=>nav(-1)}>返回</Button>

                    <Title>问卷标题</Title>

                </Space>

            </div>

            <div className={styles.main}>

                中

            </div>

            <div className={styles.right}>

                <Space>

                    <Button>保存</Button>

                    <Button>发布</Button>

                </Space>

            </div>

          </div>

        </div>

    )

  

}

  

export default EditHeader;