{"id":38118,"date":"2023-08-03T13:11:39","date_gmt":"2024-02-16T17:42:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/react%e5%85%a5%e9%97%a8-4-%e9%87%8d%e6%9e%84-%e6%8a%ac%e8%b5%b7%e7%af%87\/"},"modified":"2024-04-30T16:46:36","modified_gmt":"2024-04-30T08:46:36","slug":"react%e5%85%a5%e9%97%a8-4-%e9%87%8d%e6%9e%84-%e6%8a%ac%e8%b5%b7%e7%af%87","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/react%e5%85%a5%e9%97%a8-4-%e9%87%8d%e6%9e%84-%e6%8a%ac%e8%b5%b7%e7%af%87\/","title":{"rendered":"React\u5165\u95e8 4: \u91cd\u6784 [\u62ac\u8d77\u7bc7]"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u5e0c\u671b\u901a\u8fc7\u591a\u6b21\u7684\u6587\u7ae0\u4f7f\u7528React\u6765\u5f00\u53d1\u4e95\u5b57\u6e38\u620f (\u5373\u4e09\u5b50\u68cb)\uff0c\u8fd9\u6837\u65e2\u53ef\u4ee5\u5bf9\u81ea\u5df1\u8fdb\u884c\u590d\u4e60\uff0c\u4e5f\u53ef\u4f5c\u4e3a\u5907\u5fd8\u5f55\u7684\u610f\u4e49\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">React<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">CodeSandbox(\u516c\u5f0f)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">CodeSandbox(\u975e\u516c\u5f0f)<\/ul>\n<h2>\u7cfb\u5217\u6e05\u5355<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>React\u5165\u95e81\uff1a\u73af\u5883\u642d\u5efa[\u5728\u7ebf\u7248]<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>React\u5165\u95e81.5\uff1a\u73af\u5883\u642d\u5efa[\u672c\u5730\u7248-\u756a\u5916\u7bc7]<\/ol>\n<\/li>\n<\/ol>\n<p>React\u5165\u95e82\uff1a\u68cb\u76d8\u7684\u521b\u5efa<br \/>\nReact\u5165\u95e83\uff1a\u4ea4\u4e92\u64cd\u4f5c\u7684\u5b9e\u73b0<br \/>\nReact\u5165\u95e84\uff1a\u91cd\u6784[\u63d0\u5347\u72b6\u6001\u7bc7]\uff08\u6b64\u6b21\uff09<br \/>\nReact\u5165\u95e85\uff1a\u91cd\u6784[\u4ea4\u4e92\u64cd\u4f5c\u7bc7]<br \/>\nReact\u5165\u95e86\uff1a\u5b9e\u73b0\u8f6e\u6b21<br \/>\nReact\u5165\u95e87\uff1a\u6e38\u620f\u80dc\u5229\u5224\u5b9a<br \/>\nReact\u5165\u95e88\uff1a\u5b9e\u73b0\u6587\u672c<br \/>\nReact\u5165\u95e89\uff1a\u65f6\u95f4\u65c5\u884c\uff081\uff09<br \/>\nReact\u5165\u95e810\uff1a\u65f6\u95f4\u65c5\u884c\uff082\uff09<br \/>\nReact\u5165\u95e811\uff1a\u65f6\u95f4\u65c5\u884c\uff083\uff09<\/p>\n<h1>\u5173\u4e8e\u76ee\u7684\u7684\u95ee\u9898<\/h1>\n<h2>\u6574\u4f53\u7684\u76ee\u6807<\/h2>\n<p>\u6211\u4eec\u5c06\u4f7f\u75283&#215;3\u7684\u65b9\u683c\u6765\u5b9e\u73b0\u5728React\u516c\u5f0f\u6559\u7a0b\u4e2d\u516c\u5f00\u7684\u4e95\u5b57\u6e38\u620f\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u8fd9\u6b21\u7684\u76ee\u6807\u662f\u4ec0\u4e48?<\/h2>\n<p>\u4e3a\u4e86\u8fdb\u884c\u6e38\u620f\u80dc\u5229\u5224\u5b9a\uff0c\u6211\u4eec\u5c06\u901a\u8fc7\u66f4\u6539\u7a0b\u5e8f\u6765\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u901a\u8fc7Board\u7ec4\u4ef6\u4e86\u89e3\u6bcf\u4e2a\u683c\u5b50\u7684\u72b6\u6001\u3002<\/p>\n<h1>\u91cd\u6784<\/h1>\n<p>\u91cd\u6784\uff08Refactoring\uff09\u662f\u6307\u4ee5\u4e0b\u51e0\u4e2a\u610f\u601d\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u7ba1\u7406\u3057\u3084\u3059\u3044\u3082\u306e\u3078\u3068\u4fee\u6b63\u3059\u308b\u3053\u3068<\/ul>\n<p>\u60a8\u53ef\u4ee5\u5728\u4e0b\u4e00\u9875\u4e0a\u67e5\u770b\u4e0a\u6b21\u7684\u6e90\u6587\u4ef6\u3002<\/p>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u524d\u56de\u306e\u5185\u5bb9\u306f\u30b3\u30c1\u30e9\u304b\u3089\uff01<\/ul>\n<p>&nbsp;<\/p>\n<h2>\u7ba1\u7406\u7ec4\u4ef6\u7528\u4e8e\u7ba1\u7406\u9a6c\u65af\u7684\u72b6\u6001\u3002<\/h2>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u56de\u987e\u5f53\u524d\u7684\u7a0b\u5e8f\u3002<\/p>\n<p>Board \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068 Square \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u89aa\u5b50\u95a2\u4fc2\u306b\u3042\u308b (\u7b2c2\u56de\u306e\u8a18\u4e8b\u3092\u53c2\u7167)<\/p>\n<p>Board \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c9\u3064\u306e Square \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b<\/p>\n<p>9\u3064\u306e\u30de\u30b9\u306e\u72b6\u614b\u306f Square \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3088\u3063\u3066\u305d\u308c\u305e\u308c\u5236\u5fa1\u3055\u308c\u3066\u3044\u308b<\/p>\n<p>\u30de\u30b9\u306e\u72b6\u614b\u306f state \u578b\u306e value \u5909\u6570\u304c\u793a\u3059<\/p>\n<p>\u4e3a\u4e86\u5224\u65ad\u80dc\u5229\u6761\u4ef6\u662f\u5426\u6210\u7acb\uff0c\u9700\u8981\u83b7\u53d6\u68cb\u76d8\u5373\u6240\u6709\u65b9\u683c\u7684\u72b6\u6001\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06\u6539\u53d8\u7a0b\u5e8f\uff0c\u4f7f\u65b9\u683c\u7684\u72b6\u6001\u80fd\u591f\u5728\u7236\u7ec4\u4ef6\u7684\u68cb\u76d8\u7ec4\u4ef6\u4e2d\u8fdb\u884c\u7ba1\u7406\u3002\u8fd9\u79cd\u91cd\u6784\u88ab\u79f0\u4e3a\u63d0\u5347\u3002<\/p>\n<p>\u4e3a\u4e86\u63d0\u5347\u9762\u5177\u7684\u72b6\u6001\uff0c\u8ba9\u6211\u4eec\u5728App.js\u4e2d\u8fdb\u884c\u4ee5\u4e0b\u66f4\u6539\u3002<\/p>\n<p>Square \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5909\u66f4<\/p>\n<p>state \u578b\u306e value \u5909\u6570\u3092\u524a\u9664\u3059\u308b<br \/>\n\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066 value \u3092\u8ffd\u52a0\u3059\u308b<\/p>\n<p>handleClick() \u95a2\u6570\u3092\u524a\u9664\u3059\u308b<\/p>\n<p><button> \u8981\u7d20\u306e onClick \u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u524a\u9664\u3059\u308b<\/button><\/p>\n<p>Board \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5909\u66f4<\/p>\n<p>state \u578b\u306e squares \u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b<\/p>\n<p>\u914d\u5217\u306e\u8981\u7d20\u6570\u306f9\u500b\u3068\u3057\u3001\u5404\u8981\u7d20\u306e\u521d\u671f\u5024\u306f null \u3068\u3059\u308b<\/p>\n<p>setSquares \u3068\u3044\u3046\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3068 squares \u914d\u5217\u3092\u66f4\u65b0\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/p>\n<p>\u5404 Square \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e value \u30d7\u30ed\u30d1\u30c6\u30a3\u306b squares \u914d\u5217\u306e\u8981\u7d20\u3092\u6e21\u3059<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/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=\"s2\">react<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">.\/styles.css<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">Square<\/span><span class=\"p\">({<\/span> <span class=\"nx\">value<\/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=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"square\"<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">{<\/span><span class=\"nx\">value<\/span><span class=\"si\">}<\/span><span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/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=\"kd\">function<\/span> <span class=\"nf\">Board<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">squares<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setSquares<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"nc\">Array<\/span><span class=\"p\">(<\/span><span class=\"mi\">9<\/span><span class=\"p\">).<\/span><span class=\"nf\">fill<\/span><span class=\"p\">(<\/span><span class=\"kc\">null<\/span><span class=\"p\">));<\/span>\r\n\r\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n    <span class=\"p\">&lt;&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"board-row\"<\/span><span class=\"p\">&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">2<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n      <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"board-row\"<\/span><span class=\"p\">&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">4<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">5<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n      <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"board-row\"<\/span><span class=\"p\">&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">6<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">7<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Square<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">squares<\/span><span class=\"p\">[<\/span><span class=\"mi\">8<\/span><span class=\"p\">]<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n      <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n    <span class=\"p\">&lt;\/&gt;<\/span>\r\n  <span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u64cd\u4f5c\u7684\u7ed3\u679c\u3002\u7531\u4e8e\u5728Square\u7ec4\u4ef6\u4e2d\u8fdb\u884c\u4e86\u66f4\u6539\uff0c\u5220\u9664\u4e86<button>\u5143\u7d20\u7684onClick\u5c5e\u6027\uff0c\u56e0\u6b64\u5373\u4f7f\u5bf9\u65b9\u5757\u8fdb\u884c\u9f20\u6807\u70b9\u51fb\uff0c\u4e5f\u4e0d\u4f1a\u663e\u793a\u201cX\u201d\u3002\u7136\u800c\uff0c\u6bcf\u4e2aSquare\u7ec4\u4ef6\u901a\u8fc7value\u5c5e\u6027\u4eceBoard\u7ec4\u4ef6\u63a5\u6536squares\u6570\u7ec4\u7684\u5143\u7d20\u3002<\/button><\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d324f37434c4406c61a3f\/26-0.png\" alt=\"image.png\" \/><\/div>\n<h3>\u4e3e\u4f8b\u8bf4\u660e\u63d0\u5347\u6548\u679c<\/h3>\n<p>\u5173\u4e8e\u72b6\u6001\u53d8\u91cf\uff0c\u4e0b\u9762\u5217\u4e3e\u4e86\u53ef\u80fd\u8fdb\u884c\u5347\u7ea7\u7684\u573a\u666f\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f53\u9700\u8981\u5728\u5b50\u7ec4\u4ef6\u4e4b\u95f4\u5171\u4eab\u4fe1\u606f\u65f6<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u5f53\u9700\u8981\u83b7\u53d6\u591a\u4e2a\u5b50\u7ec4\u4ef6\u7684\u4fe1\u606f\u65f6<\/ol>\n<p>\u6211\u7528\u9ed1\u767d\u68cb\u6765\u6bd4\u55bb\u5404\u79cd\u573a\u9762\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d324f37434c4406c61a3f\/31-0.jpeg\" alt=\"\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u4e8b\u4f8b.jpg\" \/><\/div>\n<p>\u53e6\u5916\uff0c\u8fdb\u884c\u7684\u4e95\u5b57\u6e38\u620f\u4e3e\u8d77\u662f\u4e3a\u4e86&#8221;\u60f3\u8981\u4ece\u591a\u4e2aSquare\u7ec4\u4ef6\u83b7\u53d6\u65b9\u5757\u7684\u4fe1\u606f&#8221;\uff0c\u56e0\u6b64\u5c5e\u4e8e\u7b2c\u4e8c\u4e2a\u573a\u666f\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u5728\u7236\u7ec4\u4ef6\u4e2d\u58f0\u660e\u72b6\u6001\u53d8\u91cf\u6216\u6570\u7ec4\uff0c\u5e76\u5728\u8c03\u7528\u5b50\u7ec4\u4ef6\u65f6\u901a\u8fc7\u5c5e\u6027\u4f20\u9012\u4fe1\u606f\u3002<\/p>\n<h1>\u6700\u540e<\/h1>\n<p>\u8fd9\u6b21\u6211\u4eec\u4fee\u6539\u4e86\u4ee3\u7801\uff0c\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u5728 Board 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