为什么我不能在对象中映射此对象数组

Question

嗨，伙计，我一直在和next.js、redux和sanity.io合作。太糟糕了。。。Lol

无论如何，这是我被卡住的代码

ServiceCards.js 
import React from 'react';
import { useSelector } from 'react-redux';
import { getNavItems } from '../redux/actions/navItems';
const ServicesCards = () => {
const services = useSelector((state) => state.services.services);
console.log(services)
return (
<>
{Object.keys(services).map((item) => {

return(
<h2>{item}</h2>
)



})}

</>
);
};
export default ServicesCards;

正如你所看到的，我完美地连接到了redux存储，数据被重新调整为：

{0: {…}, 1: {…}, 2: {…}}
0:
body: (10) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
locations: [{…}]
mainImage: {_type: 'image', asset: {…}}
slug: {_type: 'slug', current: 'patios'}
title: "Patios"
_id: "70f4ad81-f8eb-414a-8e76-da8bf98cc4de"
[[Prototype]]: Object
1: {_id: 'cc9548aa-ccf5-4688-a6ac-3b1a41f9896d', body: Array(10), locations: Array(1), mainImage: {…}, slug: {…}, …}
2:
body: (12) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
locations: [{…}]
mainImage: {_type: 'image', asset: {…}}
slug:
current: "tree-removal"
_type: "slug"
[[Prototype]]: Object
title: "Tree Removal"
_id: "f63a0092-4b89-4ea9-9e49-f618d5f5f0b9"
[[Prototype]]: Object
[[Prototype]]: Object
constructor: ƒ Object()
hasOwnProperty: ƒ hasOwnProperty()
isPrototypeOf: ƒ isPrototypeOf()
propertyIsEnumerable: ƒ propertyIsEnumerable()
toLocaleString: ƒ toLocaleString()
toString: ƒ toString()
valueOf: ƒ valueOf()
__defineGetter__: ƒ __defineGetter__()
__defineSetter__: ƒ __defineSetter__()
__lookupGetter__: ƒ __lookupGetter__()
__lookupSetter__: ƒ __lookupSetter__()
__proto__: (...)
get __proto__: ƒ __proto__()
set __proto__: ƒ __proto__()

所以我得到的数据结构是

{
0:{...},
1: {...},
2:{...}
}

通常我只使用Object.keys来映射对象，使用它没有问题，那么为什么它在这里不起作用呢？

仔细查看Object.keys

return (
<>
{Object.keys(services).map((item) => {
return <h2>{item}</h2>;
})}
</>
);

这是我从渲染中得到的

0
1
2

根本没有数据。

store.js
import { createStore, applyMiddleware } from 'redux';
import rootReducer from './reducers';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunkMiddleware from 'redux-thunk';
import { createWrapper } from 'next-redux-wrapper';
import reducer from './reducers/pages';
const middleware = [thunkMiddleware];
const initialState = {
pages: {},
navItems: {},
services: []
};
const store = createStore(
rootReducer,
initialState,
composeWithDevTools(applyMiddleware(...middleware))
);
const initStore = () => {
return store;
};
const wrapper = createWrapper(initStore, { debug: true });
export default wrapper;

我必须在下一个redux包装中设置initialState才能让它工作，不要问我为什么。。。我希望我能留在Gatsby.js.

我真的很帮助别人，因为这让我抓狂，我敢打赌这太简单了！！

Answer 1

您可以使用Object.values代替：

Object.values(services).map((item) => (
<h2>{item}</h2>
))

Answer 2

Object.keys返回一个键数组，而不是值。应该是像这个

{Object.keys(services).map((key) => { 
const item = services[key];
return <h2>{item}</h2>;       
})}