{"id":52553,"date":"2024-12-03T09:54:08","date_gmt":"2024-12-03T01:54:08","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52553\/"},"modified":"2024-12-03T09:54:08","modified_gmt":"2024-12-03T01:54:08","slug":"react%e4%b8%aduseeffect-props-scrolltoidx%e5%a6%82%e4%bd%95%e4%bf%9d%e8%af%81%e6%af%8f%e6%ac%a1%e9%83%bd%e6%89%a7%e8%a1%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52553\/","title":{"rendered":"React\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

React\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300aReact\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\"React\u4e2duseEffect(…,<\/p>\n

useeffect(…, [props.scrolltoidx]) \u5982\u4f55\u6bcf\u6b21\u90fd\u6267\u884c<\/strong><\/p>\n

\u5728 react \u4e2d\uff0cuseeffect() \u94a9\u5b50\u5141\u8bb8\u7ec4\u4ef6\u6267\u884c\u526f\u4f5c\u7528\uff0c\u4f8b\u5982\u6570\u636e\u83b7\u53d6\u3001dom \u64cd\u4f5c\u6216\u8ba1\u65f6\u5668\u3002<\/p>\n

\u5728\u7ed9\u5b9a\u7684\u793a\u4f8b\u4e2d\uff0c\u4f60\u5e0c\u671b\u5728 props.scrolltoidx \u66f4\u65b0\u65f6\u59cb\u7ec8\u6267\u884c\u4e00\u4e2a\u526f\u4f5c\u7528\u3002\u7136\u800c\uff0c\u7531\u4e8e [props.scrolltoidx] \u4f9d\u8d56\u9879\u6570\u7ec4\u4e2d\u4ec5\u5305\u542b props.scrolltoidx\uff0c\u56e0\u6b64\u53ea\u6709\u5f53 props.scrolltoidx \u66f4\u6539\u65f6\uff0c\u7ec4\u4ef6\u624d\u4f1a\u91cd\u65b0\u6e32\u67d3\u5e76\u4e14 useeffect() \u624d\u4f1a\u6267\u884c\u3002<\/p>\n

\u8981\u786e\u4fdd\u6bcf\u6b21\u6267\u884c useeffect()\uff0c\u53ef\u4ee5\u8003\u8651\u91c7\u7528\u4ee5\u4e0b\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n

\u4f7f\u7528\u547d\u4ee4\u5f0f\u8c03\u7528<\/strong><\/p>\n

\u4f7f\u7528\u547d\u4ee4\u5f0f\u8c03\u7528\u610f\u5473\u7740\u663e\u5f0f\u5730\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u6765\u89e6\u53d1\u526f\u4f5c\u7528\uff0c\u800c\u65e0\u9700\u4f9d\u8d56\u4e8e\u9053\u5177\u66f4\u65b0\u3002\u4e3a\u6b64\uff0c\u53ef\u4ee5\u4f7f\u7528 useimperativehandle() \u94a9\u5b50\uff1a<\/p>\n

const subcontainer = forwardref((props, ref) => {\n  const scrollto = (scrolltoidx) => {\n    \/\/ \u6eda\u52a8\u64cd\u4f5c...\n  };\n\n  useimperativehandle(\n    ref,\n    () => ({\n      scrollto,\n    }),\n    []\n  );\n  \/\/ ...\u5176\u4f59\u7ec4\u4ef6\u4ee3\u7801\n});<\/pre>\n
\u5728\u7236\u7ec4\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 useref() \u94a9\u5b50\u6765\u5b58\u50a8\u5bf9\u5b50\u7ec4\u4ef6\u5b9e\u4f8b\u7684\u5f15\u7528\uff0c\u7136\u540e\u8c03\u7528 scrollto() \u65b9\u6cd5\uff1a<\/p>\n
const conRef = useRef();\n\nconst btnClick = () => {\n  conRef.current.scrollTo(20);\n};\n\nreturn (\n  <div>\n    <SubContainer ref={conRef} {...props} \/>\n    <button onClick={btnClick}>\u70b9\u51fb<\/button>\n  <\/div>\n);<\/pre>\n
\u603b\u7ed3\uff1a<\/strong><\/p>\n
\u5f53\u9700\u8981\u5f3a\u5236\u6bcf\u6b21\u6267\u884c useeffect() \u65f6\uff0c\u4f7f\u7528\u547d\u4ee4\u5f0f\u8c03\u7528\u662f\u4e00\u4e2a\u6709\u6548\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u56e0\u4e3a\u8fd9\u53ef\u4ee5\u7ed5\u8fc7\u5bf9\u9053\u5177\u66f4\u65b0\u7684\u4f9d\u8d56\u6027\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aReact\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u7c73\u4e91\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n
\n
<\/dt>\n
\n   \u4e3a\u4ec0\u4e48 Vue3 \u54cd\u5e94\u5f0f\u6e90\u7801\u4e2d Reflect.set \u9700\u8981\u5148\u8d4b\u503c\u518d\u8fd4\u56de\u624d\u80fd\u89e3\u51b3\u66f4\u65b0\u95ee\u9898\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
React\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f \u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300aReact\u4e2duseEffect(…, [props.scrollToIdx])\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u90fd\u6267\u884c\uff1f\u300b\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u6587\u7ae0\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01 useeffect(…, [props.scrolltoidx]) \u5982\u4f55\u6bcf\u6b21\u90fd\u6267\u884c \u5728 react \u4e2d\uff0cuseeffect() \u94a9\u5b50\u5141\u8bb8\u7ec4\u4ef6\u6267\u884c\u526f\u4f5c\u7528\uff0c\u4f8b\u5982\u6570\u636e\u83b7\u53d6\u3001dom \u64cd\u4f5c\u6216\u8ba1\u65f6\u5668\u3002 \u5728\u7ed9\u5b9a\u7684\u793a\u4f8b\u4e2d\uff0c\u4f60\u5e0c\u671b\u5728 props.scrolltoidx \u66f4\u65b0\u65f6\u59cb\u7ec8\u6267\u884c\u4e00\u4e2a\u526f\u4f5c\u7528\u3002\u7136\u800c\uff0c\u7531\u4e8e [props.scrolltoidx] \u4f9d\u8d56\u9879\u6570\u7ec4\u4e2d\u4ec5\u5305\u542b props.scrolltoidx\uff0c\u56e0\u6b64\u53ea\u6709\u5f53 props.scrolltoidx \u66f4\u6539\u65f6\uff0c\u7ec4\u4ef6\u624d\u4f1a\u91cd\u65b0\u6e32\u67d3\u5e76\u4e14 useeffect() \u624d\u4f1a\u6267\u884c\u3002 \u8981\u786e\u4fdd\u6bcf\u6b21\u6267\u884c useeffect()\uff0c\u53ef\u4ee5\u8003\u8651\u91c7\u7528\u4ee5\u4e0b\u89e3\u51b3\u65b9\u6848\uff1a \u4f7f\u7528\u547d\u4ee4\u5f0f\u8c03\u7528 \u4f7f\u7528\u547d\u4ee4\u5f0f\u8c03\u7528\u610f\u5473\u7740\u663e\u5f0f\u5730\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u6765\u89e6\u53d1\u526f\u4f5c\u7528\uff0c\u800c\u65e0\u9700\u4f9d\u8d56\u4e8e\u9053\u5177\u66f4\u65b0\u3002\u4e3a\u6b64\uff0c\u53ef\u4ee5\u4f7f\u7528 useimperativehandle() \u94a9\u5b50\uff1a const subcontainer = forwardref((props, ref) => { const scrollto = (scrolltoidx) => { \/\/ \u6eda\u52a8\u64cd\u4f5c… }; useimperativehandle( ref, () => ({ scrollto, }), [] ); \/\/ …\u5176\u4f59\u7ec4\u4ef6\u4ee3\u7801 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-52553","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=52553"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52553\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=52553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=52553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=52553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}