javascript - 如何在 React Native 中使用数组对象迭代数组

Question

我开始在 React Native 中编程，我有一个像这样的数组:

state = {
    territories: [
        {
            id: 1,
            number: 1,
            title: 'Territory 1',
            streets: [
                {
                    id: 1,
                    name: 'Name of street 1',
                    houses: [
                        {
                            id: 1,
                            number: '11',
                        },
                        {
                            id: 2,
                            number: '689',
                        },
                        {
                            id: 3,
                            number: '117a',
                        },
                    ],
                },
                {
                    id: 2,
                    nome: 'Name of street 2',
                    houses: [
                        {
                            id: 4,
                            number: '02',
                        },
                        {
                            id: 5,
                            number: '655',
                        },
                        {
                            id: 6,
                            number: '11b',
                        },
                    ],
                },
            ],
        },
    ],
};

我想用 .map() 函数迭代它，以便创建像这样的节列表 example 但我无法在街道数组中迭代房屋的数字数组。 有没有办法用 React Native 来做到这一点？ 预先非常感谢您

Answer 1

您需要一张 map 来遍历各个地区，然后遍历街道和房屋。 将代码复制粘贴到codesandbox.io react 沙箱中。您可以修复 html 以使用表格

import React from "react";
import ReactDOM from "react-dom";

import "./styles.css";

const state = {
  territories: [
    {
      id: 1,
      number: 1,
      title: "Territory 1",
      streets: [
        {
          id: 1,
          name: "Name of street 1",
          houses: [
            {
              id: 1,
              number: "11"
            },
            {
              id: 2,
              number: "689"
            },
            {
              id: 3,
              number: "117a"
            }
          ]
        },
        {
          id: 2,
          name: "Name of street 2",
          houses: [
            {
              id: 4,
              number: "02"
            },
            {
              id: 5,
              number: "655"
            },
            {
              id: 6,
              number: "11b"
            }
          ]
        }
      ]
    }
  ]
};

function App() {
  return state.territories.map(territory => {
    return territory.streets.map(street => {
      return (
        <div>
          <p>{street.name}</p>
          {street.houses.map(house => <div>{house.number} </div>)}
        </div>
      );
    });
  });
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);