學(xué)redux的時(shí)候看到文檔是這樣聲明組件的，難道不是要繼承Component嗎import React from 'react'import Footer from './Footer'import AddTodo from '../containers/AddTodo'import VisibleTodoList from '../containers/VisibleTodoList'const App = () => (  <div>    <AddTodo />    <VisibleTodoList />    <Footer />  </div>)export default App還有一個(gè)小問(wèn)題是components和containers到底啥區(qū)別呀--------------------補(bǔ)充----------------------我看他的容器也是這樣定義組件的，那他是不是也是沒(méi)有生命周期的組件import React from 'react'import { connect } from 'react-redux'import { addTodo } from '../actions'const AddTodo = ({ dispatch }) => {  let input  return (    <div>      <form onSubmit={e => {        e.preventDefault()        if (!input.value.trim()) {          return        }        dispatch(addTodo(input.value))        input.value = ''      }}>        <input ref={node => input = node} />        <button type="submit">          Add Todo        </button>      </form>    </div>  )}export default connect()(AddTodo)然后他的export default connect()(AddTodo)是啥意思