摘要：
顺序是先写父组件 再写子组件 父组件： 1 import React from "react"; 2 import Child from "./Chid"; 3 class Parent extends React.Component{ 4 constructor(){ 5 super(); 6 t 阅读全文
摘要：
顺序的话先写子组件再写父组件 父组件： import React from "react"; import Child from "./Chid"; import Second from "./Second"; class Parent extends React.Component { const 阅读全文