{"id":38503,"date":"2023-08-04T11:59:26","date_gmt":"2023-09-09T17:22:58","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e7%94%a8%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84%e4%be%8b%e5%ad%90%e6%9d%a5%e8%af%b4%e6%98%8ehoc%ef%bc%88higher-order-component%ef%bc%89%e3%80%82\/"},"modified":"2024-04-30T16:56:27","modified_gmt":"2024-04-30T08:56:27","slug":"%e5%b0%9d%e8%af%95%e7%94%a8%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84%e4%be%8b%e5%ad%90%e6%9d%a5%e8%af%b4%e6%98%8ehoc%ef%bc%88higher-order-component%ef%bc%89%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e7%94%a8%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84%e4%be%8b%e5%ad%90%e6%9d%a5%e8%af%b4%e6%98%8ehoc%ef%bc%88higher-order-component%ef%bc%89%e3%80%82\/","title":{"rendered":"\u5c1d\u8bd5\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u8bf4\u660eHOC\uff08Higher Order Component\uff09"},"content":{"rendered":"<h2>HOC\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p><b>\u9ad8\u7ea7\u7ec4\u4ef6\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u83b7\u53d6\u7ec4\u4ef6\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7ec4\u4ef6\u3002<\/b><\/p>\n<h2>\u7b80\u5355\u7684\u4f8b\u5b50<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u903b\u8f91\uff0c\u5b83\u4f1a\u5728\u52a0\u8f7d3\u79d2\u949f\u4e4b\u540e\u624d\u52a0\u8f7d\u7ec4\u4ef6\u3002<br \/>\n\u4ece\u903b\u8f91\u4e2d\u53ef\u4ee5\u770b\u51fa\u7684\u5171\u540c\u90e8\u5206\u662f\uff1a<br \/>\n1.\u52a0\u8f7d3\u79d2\u949f<br \/>\n2.\u52a0\u8f7d\u5b8c\u6210\u540e\u52a0\u8f7d\u7ec4\u4ef6<br \/>\n\u901a\u8fc7\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\uff08HOC\uff09\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5171\u540c\u90e8\u5206\u63d0\u53d6\u51fa\u6765\u4ee5\u4fbf\u8fdb\u884c\u590d\u7528\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\">useState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"k\">import<\/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=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">Button<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">loading<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setLoading<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"kd\">const<\/span> <span class=\"nx\">timer<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">setTimeout<\/span><span class=\"p\">(<\/span>\r\n            <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setLoading<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"p\">,<\/span> <span class=\"mi\">3000<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">clearInterval<\/span><span class=\"p\">(<\/span><span class=\"nx\">timer<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">})<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">loading<\/span> <span class=\"p\">?<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\">&lt;\/<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">:<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>Button<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\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\">useState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"k\">import<\/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=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">Input<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">loading<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setLoading<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"kd\">const<\/span> <span class=\"nx\">timer<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">setTimeout<\/span><span class=\"p\">(<\/span>\r\n            <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setLoading<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"p\">,<\/span> <span class=\"mi\">3000<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">clearInterval<\/span><span class=\"p\">(<\/span><span class=\"nx\">timer<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">})<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">loading<\/span> <span class=\"p\">?<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\">&lt;\/<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">:<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">input<\/span> <span class=\"na\">defaultValue<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Input<\/span><span class=\"dl\">\"<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d34fc37434c4406c6ada8\/10-1.png\" alt=\"image.png\" \/><\/div>\n<p>\u4e0b\u9762\u662f\u5f15\u5165HOC\u7684\u793a\u4f8b\uff01<\/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\">useState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"k\">import<\/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<span class=\"k\">import<\/span> <span class=\"nx\">withLoading<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/withLoading<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">Button<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>Button<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\r\n<span class=\"p\">}<\/span>\r\n    <span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nf\">withLoading<\/span><span class=\"p\">(<\/span><span class=\"nx\">Button<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ HOC\u304b\u3089component\u3092\u30ea\u30bf\u30fc\u30f3\u3057\u3066\u3082\u3089\u3046<\/span>\r\n<\/code><\/pre>\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\">useState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"k\">import<\/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<span class=\"k\">import<\/span> <span class=\"nx\">withLoading<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/withLoading<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">Input<\/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\">defaultValue<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Input<\/span><span class=\"dl\">\"<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nf\">withLoading<\/span><span class=\"p\">(<\/span><span class=\"nx\">Input<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ HOC\u304b\u3089component\u3092\u30ea\u30bf\u30fc\u30f3\u3057\u3066\u3082\u3089\u3046<\/span>\r\n<\/code><\/pre>\n<p>\u5728Button\u7ec4\u4ef6\u548cInput\u7ec4\u4ef6\u4e2d\uff0c\u6240\u6709\u5171\u540c\u7684\u903b\u8f91\u90fd\u88ab\u7701\u7565\u6389\u4e86\u3002<br \/>\n\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\uff0c\u589e\u52a0\u4e86\u8c03\u7528HOC\uff08\u9ad8\u9636\u7ec4\u4ef6\uff09\u7684\u903b\u8f91\u3002<br \/>\n\u6b63\u5982\u4e4b\u524d\u6240\u8bf4\uff0cHOC\u5c06\u7ec4\u4ef6\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u7ec4\u4ef6\uff0c<br \/>\n\u6240\u4ee5\u6211\u4eec\u5c06\u5176\u5199\u6210export default {HOC\u7ec4\u4ef6(\u7ec4\u4ef6)}\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\">useState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"k\">import<\/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=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">withLoading<\/span><span class=\"p\">(<\/span><span class=\"nx\">Compomnent<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">WithLoadingComponent<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">loading<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setLoading<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"kd\">const<\/span> <span class=\"nx\">timer<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">setTimeout<\/span><span class=\"p\">(<\/span>\r\n                <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setLoading<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">)<\/span>\r\n                <span class=\"p\">,<\/span> <span class=\"mi\">3000<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">clearInterval<\/span><span class=\"p\">(<\/span><span class=\"nx\">timer<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">})<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nx\">loading<\/span> <span class=\"p\">?<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\">&lt;\/<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">:<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">Compomnent<\/span> <span class=\"si\">{<\/span><span class=\"p\">...<\/span><span class=\"nx\">props<\/span><span class=\"si\">}<\/span><span class=\"p\">\/&gt;;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">WithLoadngComponent<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>HOC\u662f\u6307\u9ad8\u9636\u7ec4\u4ef6\u3002\u4ece\u903b\u8f91\u4e0a\u7406\u89e3\uff0c\u9ad8\u9636\u7ec4\u4ef6\u4e0d\u4f1a\u4fee\u6539\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u7684\u7ec4\u4ef6\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u63a5\u6536\u5230\u7684\u7ec4\u4ef6\u8fdb\u884c\u5c01\u88c5\uff0c\u5e76\u901a\u8fc7\u63a5\u6536\u5230\u7684\u7ec4\u4ef6\u7684\u6bcf\u4e2aprops\u8fdb\u884c\u6e32\u67d3\u3002\u6b64\u5916\uff0c\u9ad8\u9636\u7ec4\u4ef6\u4e5f\u53ef\u4ee5\u662f\u6ca1\u6709\u526f\u4f5c\u7528\u7684\u7eaf\u51fd\u6570\uff08\u4e3a\u4ec0\u4e48withLoading\u4ee5\u5c0f\u5199\u5b57\u6bcd\u5f00\u5934\uff01\uff09\u3002\u5b83\u5728\u7eaf\u51fd\u6570\u4e2d\u521b\u5efa\u5e76\u8fd4\u56de\u7ec4\u4ef6\u7684\u7ed3\u6784\u3002<\/p>\n<p>HOC\u7684\u547d\u540d\u89c4\u5219\u662f\u4f7f\u7528\u301c\u301c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HOC\u7684\u542b\u4e49\u662f\u4ec0\u4e48\uff1f 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