{"id":38136,"date":"2023-03-19T02:17:35","date_gmt":"2023-08-07T23:13:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%90%86%e8%a7%a3%e5%92%8c%e5%ba%94%e7%94%a8%e6%97%a0%e9%9c%80%e5%9c%a8react%e4%b8%ad%e5%bc%95%e8%b5%b7%e5%9b%b0%e6%83%91%e7%9a%84useref%e5%92%8ccreateref%e3%80%82\/"},"modified":"2024-01-15T09:49:44","modified_gmt":"2024-01-15T01:49:44","slug":"%e7%90%86%e8%a7%a3%e5%92%8c%e5%ba%94%e7%94%a8%e6%97%a0%e9%9c%80%e5%9c%a8react%e4%b8%ad%e5%bc%95%e8%b5%b7%e5%9b%b0%e6%83%91%e7%9a%84useref%e5%92%8ccreateref%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%90%86%e8%a7%a3%e5%92%8c%e5%ba%94%e7%94%a8%e6%97%a0%e9%9c%80%e5%9c%a8react%e4%b8%ad%e5%bc%95%e8%b5%b7%e5%9b%b0%e6%83%91%e7%9a%84useref%e5%92%8ccreateref%e3%80%82\/","title":{"rendered":"\u7406\u89e3\u548c\u5e94\u7528\u65e0\u9700\u5728React\u4e2d\u5f15\u8d77\u56f0\u60d1\u7684useRef\u548ccreateRef"},"content":{"rendered":"<p>\u4f60\u597d\uff0c\u6211\u6765\u8be6\u7ec6\u89e3\u91ca\u4e00\u4e0b\u53ef\u80fd\u4f1a\u5728\u4f7f\u7528React\u8fdb\u884c\u5f00\u53d1\u65f6\u9047\u5230\u7684\u95ee\u9898\u3002\u4eca\u5929\u6211\u4eec\u5c06\u8be6\u7ec6\u8ba8\u8bba useRef \u548c createRef \u7684\u533a\u522b\u4ee5\u53ca\u5b83\u4eec\u5404\u81ea\u7684\u4f7f\u7528\u793a\u4f8b\u3002<\/p>\n<h2>\u4f7f\u7528 useRef \u548c createRef \u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u5728React\u4e2d\uff0c\u5b58\u5728\u7740\u4e24\u79cd\u4e0d\u540c\u7684ref\u521b\u5efa\u65b9\u6cd5\uff0c\u5206\u522b\u662fuseRef\u548ccreateRef\u3002\u5b83\u4eec\u4e3b\u8981\u7528\u4e8e\u83b7\u53d6DOM\u5143\u7d20\u7684\u5f15\u7528\uff0c\u4f46\u5728\u4e0d\u540c\u7684\u76ee\u7684\u548c\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002<\/p>\n<p>createRef\u4e3b\u8981\u5728\u7c7b\u7ec4\u4ef6\u4e2d\u4f7f\u7528\uff0c\u5e76\u4e14\u6bcf\u6b21\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684ref\u5b9e\u4f8b\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u6bcf\u5f53React\u7ec4\u4ef6\u91cd\u65b0\u6e32\u67d3\u65f6\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684ref\u3002<\/p>\n<p>\u4e00\u65b9\uff0cuseRef \u662f React Hooks \u7684\u4e00\u90e8\u5206\uff0c\u7528\u4e8e\u5728\u51fd\u6570\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u53ef\u53d8\u7684 ref \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u5728\u521d\u59cb\u8c03\u7528\u65f6\u4ee5\u53c2\u6570\u7684\u5f62\u5f0f\u8fdb\u884c\u521d\u59cb\u5316\u3002\u8be5\u5bf9\u8c61\u5177\u6709 .current \u5c5e\u6027\uff0c\u8be5\u5c5e\u6027\u53ef\u4ee5\u66f4\u6539\u6240\u5f15\u7528\u7684\u503c\u3002\u5e76\u4e14\uff0c\u6bcf\u6b21\u7ec4\u4ef6\u91cd\u65b0\u6e32\u67d3\u65f6\u90fd\u4f1a\u8fd4\u56de\u76f8\u540c\u7684 ref \u5bf9\u8c61\u3002<\/p>\n<hr \/>\n<h2>\u521b\u5efacreateRef\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528React\u7684\u7c7b\u7ec4\u4ef6\u4e2dcreateRef\u7684\u57fa\u672c\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"nx\">React<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">MyComponent<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nx\">Component<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">super<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">myRef<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createRef<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nf\">componentDidMount<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">myRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">.<\/span><span class=\"nf\">focus<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nf\">render<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">input<\/span> <span class=\"na\">ref<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">myRef<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">MyComponent<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f7f\u7528createRef\u6765\u521b\u5efa\u5bf9input\u5143\u7d20\u7684\u5f15\u7528\uff0c\u5e76\u4e14\u5728\u7ec4\u4ef6\u88ab\u6302\u8f7d\u65f6\u5c06\u7126\u70b9\u653e\u5728\u8be5input\u5143\u7d20\u4e0a\u3002<\/p>\n<hr \/>\n<h2>useRef \u7684\u4f7f\u7528\u5b9e\u4f8b<\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528React\u51fd\u6570\u7ec4\u4ef6\u548cuseRef\u7684\u57fa\u672c\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"nx\">React<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">useRef<\/span><span class=\"p\">,<\/span> <span class=\"nx\">useEffect<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">MyComponent<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">myRef<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useRef<\/span><span class=\"p\">();<\/span>\r\n\r\n  <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">myRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">.<\/span><span class=\"nf\">focus<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n\r\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">input<\/span> <span class=\"na\">ref<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">myRef<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">MyComponent<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528useRef\u521b\u5efa\u5bf9input\u5143\u7d20\u7684\u5f15\u7528\uff0c\u5e76\u5728\u7ec4\u4ef6\u6302\u8f7d\u540e\u5c06\u7126\u70b9\u8bbe\u7f6e\u5230\u8be5input\u5143\u7d20\u4e0a\u3002\u8bf7\u6ce8\u610f\uff0cuseRef\u4f1a\u91cd\u65b0\u4f7f\u7528\u6700\u521d\u521b\u5efa\u7684\u5f15\u7528\uff0c\u56e0\u6b64\u4f1a\u8fd4\u56de\u76f8\u540c\u7684ref\u5bf9\u8c61\u3002<\/p>\n<hr \/>\n<h2>useRef \u548c createRef \u4e4b\u95f4\u7684\u533a\u522b\u3002<\/h2>\n<p>createRef\u548cuseRef\u7684\u4e3b\u8981\u533a\u522b\u662f\u5728\u91cd\u65b0\u6e32\u67d3\u65f6\u662f\u5426\u521b\u5efa\u65b0\u7684ref\u5b9e\u4f8b\u3002createRef\u6bcf\u6b21\u90fd\u4f1a\u521b\u5efa\u65b0\u7684ref\uff0c\u800cuseRef\u4f1a\u91cd\u7528\u6700\u521d\u521b\u5efa\u7684ref\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5982\u679c\u9700\u8981\u8ffd\u8e2aref\u7684\u503c\u6216\u8005\u4e0d\u60f3\u5728ref\u7684\u503c\u53d1\u751f\u53d8\u5316\u65f6\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528useRef\u3002\u53e6\u5916\uff0cuseRef\u662fReact Hooks\u7684\u4e00\u90e8\u5206\uff0c\u7528\u4e8e\u51fd\u6570\u7ec4\u4ef6\u3002<\/p>\n<hr \/>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u8ba8\u8bba\u4e86React\u4e2duseRef\u548ccreateRef\u7684\u533a\u522b\uff0c\u5e76\u63a2\u8ba8\u4e86\u5b83\u4eec\u7684\u4f7f\u7528\u793a\u4f8b\u3002\u901a\u8fc7\u6b63\u786e\u4f7f\u7528\u5b83\u4eec\uff0c\u53ef\u4ee5\u63d0\u5347React\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u5e76\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/p>\n<hr \/>\n<p>\u5982\u679c\u4f60\u89c9\u5f97\u8fd9\u7bc7\u6587\u7ae0\u6709\u5e2e\u52a9\uff0c\u8bf7\u52a1\u5fc5\u70b9\u4e2a\u8d5e\u3002\u4f60\u4eec\u7684\u652f\u6301\u662f\u6211\u4eec\u524d\u8fdb\u7684\u52a8\u529b\u3002\u8c22\u8c22\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u597d\uff0c\u6211\u6765\u8be6\u7ec6\u89e3\u91ca\u4e00\u4e0b\u53ef\u80fd\u4f1a\u5728\u4f7f\u7528React\u8fdb\u884c\u5f00\u53d1\u65f6\u9047\u5230\u7684\u95ee\u9898\u3002\u4eca\u5929\u6211\u4eec\u5c06\u8be6\u7ec6\u8ba8\u8bba useRef \u548c cre [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38136","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u7406\u89e3\u548c\u5e94\u7528\u65e0\u9700\u5728React\u4e2d\u5f15\u8d77\u56f0\u60d1\u7684useRef\u548ccreateRef - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7406\u89e3\u548c\u5e94\u7528\u65e0\u9700\u5728react\u4e2d\u5f15\u8d77\u56f0\u60d1\u7684useref\u548ccreateref\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u7406\u89e3\u548c\u5e94\u7528\u65e0\u9700\u5728React\u4e2d\u5f15\u8d77\u56f0\u60d1\u7684useRef\u548ccreateRef\" \/>\n<meta property=\"og:description\" content=\"\u4f60\u597d\uff0c\u6211\u6765\u8be6\u7ec6\u89e3\u91ca\u4e00\u4e0b\u53ef\u80fd\u4f1a\u5728\u4f7f\u7528React\u8fdb\u884c\u5f00\u53d1\u65f6\u9047\u5230\u7684\u95ee\u9898\u3002\u4eca\u5929\u6211\u4eec\u5c06\u8be6\u7ec6\u8ba8\u8bba useRef \u548c cre [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7406\u89e3\u548c\u5e94\u7528\u65e0\u9700\u5728react\u4e2d\u5f15\u8d77\u56f0\u60d1\u7684useref\u548ccreateref\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-07T23:13:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-15T01:49:44+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, 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