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  • react入门系列之如何拆分ui组件和容器组件

    如何拆分ui组件和容器组件

    • ui组件-傻瓜组件-页面渲染
    • 容器组件-聪明组件-页面逻辑
    • 我们现看看原来组件
    /**
     * 组件就是一个需要借书的人,通过 dispatch 传达 action (书名)给图书管理员(store)
     */
    
    import React, { Component, Fragment }from 'react';
    import { Input, Button, List, message } from "antd";
    import store from './store'; // 引入图书管理员 store
    // 引入action
    import { getInputChangeValue, getAddTodoListValue, getDeletTodoListValue } from './store/actionCreators'
    // import { CHANGE_INPUT_VALUE, CHANGE_LIST_VALUE, DELETE_LIST_VALUE } from './store/actionTypes'
    import "antd/dist/antd.css";
    class App extends Component {
      constructor(props){
        super(props)
        this.state = store.getState()
        console.log(store.getState())
        this.handleInputChange = this.handleInputChange.bind(this);
        this.addTodoList = this.addTodoList.bind(this);
        this.handleStroeChange = this.handleStroeChange.bind(this);
        // this.deletTodoList = this.deletTodoList.bind(this);
        store.subscribe(this.handleStroeChange) // 图书管理员会随时通知各个借书人,图书馆书籍的变化
      }
    
      render() {
        return (
          <Fragment>
            <div style={{ marginTop: '10px', marginLeft: '10px'}}>
              <Input 
              placeholder='todo-list'
              style={{ '300px', marginRight: '10px'}}
              onChange = { this.handleInputChange }
              value = { this.state.inputValue }
              />
              <Button 
              type="primary"
              onClick = { this.addTodoList }
              >提交</Button>
            </div>
            <List
            style={{ '300px', marginLeft: '10px', marginTop: '5px'}}
            size="large"
            bordered
            dataSource={ this.state.list ? this.state.list : null }
            renderItem={ (item, index) => <List.Item style={{position:'relative'}}>
            {item}
            <Button 
            type='danger' 
            style={{position: 'absolute', right: '10px', top:'50%', marginTop:'-5%'}}
            onClick={ this.deletTodoList.bind(this, index) }
            >删除</Button>
            </List.Item>}
            />
          </Fragment>
        );
      }
      handleInputChange(e) {
        /*
        const action = {
          type: CHANGE_INPUT_VALUE, // 借什么书
          value: e.target.value
        }
        */
        const action = getInputChangeValue(e.target.value)
        store.dispatch(action); // 传达给store
        console.log(e.target.value)
      }
      // 添加
      addTodoList() {
        /*
        if (this.state.inputValue) {
          const action = {
            type: CHANGE_LIST_VALUE,
            item: this.state.inputValue
          }
          store.dispatch(action)
        } else {
          message.warning('请输入内容');
        }
        */
       if (this.state.inputValue) {
          const action = getAddTodoListValue(this.state.inputValue)
          store.dispatch(action)
       } else {
        message.warning('请输入内容');
       }
      }
      // 删除
      deletTodoList(index) {
        /*
        const action = {
          type: DELETE_LIST_VALUE,
          value: index
        }
        */
        const action = getDeletTodoListValue(index)
        store.dispatch(action)
      }
      handleStroeChange() {
        this.setState(store.getState()) // 每当图书馆有变化的时候,图书管理员(store)通过这个方式告诉借书人(组件)
      }
    }
    
    export default App;
    
    
    • 接下来我们本原组件的html部分(render函数的内容)拆分到单独一个组件
    • 原来的数据方法都是通过props获取
    • render函数中的jsx语法不能直接在函数中传递参数,但是可以使用箭头函数
    import React, { Component, Fragment }from 'react';
    import { Input, Button, List } from "antd";
    
    class AppUi extends Component {
        render() {
            return (
                <Fragment>
                <div style={{ marginTop: '10px', marginLeft: '10px'}}>
                  <Input 
                  placeholder='todo-list'
                  style={{ '300px', marginRight: '10px'}}
                  onChange = { this.props.handleInputChange }
                  value = { this.props.inputValue }
                  />
                  <Button 
                  type="primary"
                  onClick = { this.props.addTodoList }
                  >提交</Button>
                </div>
                <List
                style={{ '300px', marginLeft: '10px', marginTop: '5px'}}
                size="large"
                bordered
                dataSource={ this.props.list ? this.props.list : null }
                renderItem={ (item, index) => (<List.Item  style={{position:'relative'}}>
                {item}
                <Button 
                type='danger' 
                onClick= {() => {this.props.deletTodoList(index)}}
                style={{position: 'absolute', right: '10px', top:'50%', marginTop:'-5%'}}
                >删除</Button>
                </List.Item>)}
                />
              </Fragment>
            )
        }
    }
    
    export default AppUi
    
    • 原组件剩下的都是逻辑代码,编程了容器组件
    • 将ui组件引入原组件
    • 并且给ui组件中传递他所需要的props
    /**
     * 组件就是一个需要借书的人,通过 dispatch 传达 action (书名)给图书管理员(store)
     */
    
    import React, { Component }from 'react';
    import { message } from "antd";
    import store from './store'; // 引入图书管理员 store
    import AppUi from './AppUi';
    // 引入action
    import { getInputChangeValue, getAddTodoListValue, getDeletTodoListValue } from './store/actionCreators'
    // import { CHANGE_INPUT_VALUE, CHANGE_LIST_VALUE, DELETE_LIST_VALUE } from './store/actionTypes'
    import "antd/dist/antd.css";
    class App extends Component {
      constructor(props){
        super(props)
        this.state = store.getState()
        console.log(store.getState())
        this.handleInputChange = this.handleInputChange.bind(this);
        this.addTodoList = this.addTodoList.bind(this);
        this.handleStroeChange = this.handleStroeChange.bind(this);
        this.deletTodoList = this.deletTodoList.bind(this);
        store.subscribe(this.handleStroeChange) // 图书管理员会随时通知各个借书人,图书馆书籍的变化
      }
    
      render() {
        return (
          <AppUi
          inputValue = {this.state.inputValue}
          handleInputChange = {this.handleInputChange}
          deletTodoList = {this.deletTodoList}
          addTodoList = {this.addTodoList}
          list = {this.state.list}
          />
        )
      }
      handleInputChange(e) {
        /*
        const action = {
          type: CHANGE_INPUT_VALUE, // 借什么书
          value: e.target.value
        }
        */
        const action = getInputChangeValue(e.target.value)
        store.dispatch(action); // 传达给store
        console.log(e.target.value)
      }
      // 添加
      addTodoList() {
        /*
        if (this.state.inputValue) {
          const action = {
            type: CHANGE_LIST_VALUE,
            item: this.state.inputValue
          }
          store.dispatch(action)
        } else {
          message.warning('请输入内容');
        }
        */
       if (this.state.inputValue) {
          const action = getAddTodoListValue(this.state.inputValue)
          store.dispatch(action)
       } else {
        message.warning('请输入内容');
       }
      }
      // 删除
      deletTodoList(index) {
        /*
        const action = {
          type: DELETE_LIST_VALUE,
          value: index
        }
        */
       console.log(index)
        const action = getDeletTodoListValue(index)
        store.dispatch(action)
      }
      handleStroeChange() {
        this.setState(store.getState()) // 每当图书馆有变化的时候,图书管理员(store)通过这个方式告诉借书人(组件)
      }
    }
    
    export default App;
    
    
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  • 原文地址:https://www.cnblogs.com/boye-1990/p/11459790.html
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