{"id":6185,"date":"2022-05-19T17:22:14","date_gmt":"2022-05-19T09:22:14","guid":{"rendered":"https:\/\/www.lilichao.com\/?p=6185"},"modified":"2022-05-20T00:29:43","modified_gmt":"2022-05-19T16:29:43","slug":"%e8%87%aa%e5%ae%9a%e4%b9%89%e9%92%a9%e5%ad%90","status":"publish","type":"post","link":"https:\/\/lilichao.com\/?p=6185","title":{"rendered":"\u81ea\u5b9a\u4e49\u94a9\u5b50"},"content":{"rendered":"\n

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const [stuData, setStuData] = useState<\/em>([]);\n<\/em>const [loading, setLoading] = useState<\/em>(false);\n<\/em>const [error, setError] = useState<\/em>(null);\\\nuseEffect<\/em>(()=>{\n    const fetchData = async () => {\n        try{\n            setLoading(true);\n            setError(null);\n            const res = await fetch<\/em>('http:\/\/localhost:1337\/api\/students');\n<\/em>            <\/em>if(res.ok){\n                const data = await res.json();\n                setStuData(data.data);\n            }else{\n                throw new Error<\/em>('\u6570\u636e\u52a0\u8f7d\u5931\u8d25\uff01');\n            }\n        }catch (e){\n            setError(e);\n        }finally {\n            setLoading(false);\n        }\n    };\n    fetchData();\n}, []);<\/pre>\n\n\n\n
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\u4f7f\u7528\u94a9\u5b50<\/h2>\n\n\n\n
  1. \u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u547d\u540d\u4e3auseXxx<\/li>
  2. \u5728\u51fd\u6570\u4e2d\u6b63\u5e38\u8c03\u7528React\u4e2d\u7684\u5404\u79cd\u94a9\u5b50<\/li>
  3. \u5728\u7ec4\u4ef6\u4e2d\u5f15\u7528\u94a9\u5b50<\/li><\/ol>\n\n\n\n
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    src\/hooks\/useFetch.js<\/p>\n\n\n\n
    import {useEffect, useState} from \"react\";\r\n\r\nconst useFetch = (url) => {\r\n\r\n    const [data, setData] = useState([]);\r\n    const [loading, setLoading] = useState(false);\r\n    const [error, setError] = useState(null);\r\n\r\n    async function fetchData(){\r\n        try{\r\n            setLoading(true);\r\n            setError(null);\r\n\r\n            const res = await fetch('http:\/\/localhost:1337\/api\/students');\r\n            if(!res.ok){\r\n                throw new Error('\u6570\u636e\u52a0\u8f7d\u5931\u8d25\uff01');\r\n            }\r\n            const data = await res.json();\r\n            setData(data.data);\r\n        }catch (e){\r\n            setError(e);\r\n        }finally {\r\n            setLoading(false);\r\n        }\r\n    }\r\n    return {data, loading, error, fetchData};\r\n};\r\n\r\nexport default useFetch;\r\n<\/pre>\n\n\n\n
    App.js\u8c03\u7528\u94a9\u5b50<\/p>\n\n\n\n
    const {data:stuData, loading, error, fetchData} = useFetch();\n\nuseEffect(()=>{\n    fetchData();\n}, [])<\/pre>\n\n\n\n
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    \u968f\u7740\u7ec3\u4e60\u529f\u80fd\u7684\u589e\u591a\uff0c\u6211\u4eec\u7f16\u5199\u7684React\u4ee3\u7801\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\u3002\u50cf\u662f\u4e0a\u8282\u8bfe\u4e2d\u6211\u7f16\u5199\u7684React\u4ee3\u7801\uff0c\u4ec5\u4ec5\u662f\u589e\u52a0\u4e86\u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":6186,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[198],"tags":[202,261,260],"_links":{"self":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6185"}],"collection":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6185"}],"version-history":[{"count":4,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6185\/revisions"}],"predecessor-version":[{"id":6192,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6185\/revisions\/6192"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/media\/6186"}],"wp:attachment":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6185"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6185"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}