TypeError：渲染不是具有上下文 api 的函数

Question

我试图用 React 制作一个天气应用程序。但是，我遇到了一个我无法解决的错误。

这些是我的代码：

App.js：

import './App.css';
import SelectCity from './components/SelectCity';
import CityProvider from './context/CityContext';

function App() {
  return (
      <CityProvider>
        <SelectCity></SelectCity>
      </CityProvider>
  )
}

export default App;

SelectCity.js：

import {useContext} from 'react'
import useTurkeyCities from "use-turkey-cities"
import CityContext from '../context/CityContext'

function SelectCity() {

    const { cities, city } = useTurkeyCities()
    const { contextCity, setContextCity } = useContext(CityContext)

    return (
        <div>
            <select
                onChange={e => {
                    setContextCity(e.target.value);
                }}
                value={city}
            >
                {cities.map(city => (
                    <option key={`city-${city}`} value={city}>
                        {city}
                    </option>
                ))}
            </select>
        </div>
    )
}

export default SelectCity

CityContext.js：

import { createContext, useState } from "react";

const CityContext = createContext()

export const CityProvider = ({children}) => {

    const [contextCity, setContextCity] = useState(null)
    const cityValues = {
        contextCity,
        setContextCity
    }

    return <CityContext.Provider value={cityValues}>{children}</CityContext.Provider>
    
}

export default CityContext

但我有 TypeError: render is not a function。有什么办法解决这个问题，我不明白

Answer 1

我解决了这个错误。

import CityProvider from './context/CityContext';

我把这段代码改成：

import {CityProvider} from './context/CityContext';