为什么我的 axios 请求在控制台中打印但没有设置状态
我试图在 React 组件中显示数据库中的一些数据，但数据没有保存在状态挂钩中，但请求的响应确实在控制台中打印。
我该如何解决这个问题？
const [error, setError] = useState(null);
const [isLoaded, setIsLoaded] = useState(false);
const [collections, setCollections] = useState([]);
useEffect(() => {
const getCollections = async () => {
try {
const response = await axios.get('http://localhost:4000/api/collections');
setIsLoaded(true);
console.log(response); // This prints the response
setCollections(response);
console.log(collections); // This prints []
} catch (error) {
setError(error);
setIsLoaded(true);
}
}
getCollections();
}, [])
I'm trying to display some data from my database in my React component but the data isn't getting saved in the state hook, but the request's response does print in the console.
How can I fix this?
const [error, setError] = useState(null);
const [isLoaded, setIsLoaded] = useState(false);
const [collections, setCollections] = useState([]);
useEffect(() => {
const getCollections = async () => {
try {
const response = await axios.get('http://localhost:4000/api/collections');
setIsLoaded(true);
console.log(response); // This prints the response
setCollections(response);
console.log(collections); // This prints []
} catch (error) {
setError(error);
setIsLoaded(true);
}
}
getCollections();
}, [])
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setCollections不会立即被 React 执行。新状态应该在下一次渲染时可用。尝试在渲染阶段记录日志：setCollectionsis not executed immediately by React. The new state should be available on the next render. Try logging during the render phase: