{"id":5751,"date":"2023-01-06T14:53:58","date_gmt":"2023-01-06T06:53:58","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5751"},"modified":"2023-01-06T14:53:58","modified_gmt":"2023-01-06T06:53:58","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8react%e4%b8%ad%e4%bd%bf%e7%94%a8%e9%ab%98%e7%b4%9a%e7%b5%84%e4%bb%b6%e7%8b%80%e6%85%8b%e7%ae%a1%e7%90%86%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%a6%82%e4%bd%95%e5%9c%a8react%e4%b8%ad%e4%bd%bf%e7%94%a8%e9%ab%98%e7%b4%9a%e7%b5%84%e4%bb%b6%e7%8b%80%e6%85%8b%e7%ae%a1%e7%90%86%ef%bc%9f\/","title":{"rendered":"\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528\u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff1f"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React, \u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406, \u7a0b\u5f0f\u7bc4\u4f8b\"><\/p>\n<h1>\u5982\u4f55\u5728 React \u4e2d\u4f7f\u7528\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff1f<\/h1>\n<p>React \u662f\u4e00\u500b\u7528\u65bc\u69cb\u5efa\u7528\u6236\u754c\u9762\u7684 JavaScript \u5eab\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u69cb\u5efa\u9ad8\u6027\u80fd\u7684\u7db2\u9801\u61c9\u7528\u7a0b\u5e8f\u3002React \u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff1f<\/h2>\n<p>\u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\u662f\u4e00\u7a2e\u6280\u8853\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u66f4\u65b0\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<p><!--more--><\/p>\n<h2>\u5982\u4f55\u5728 React \u4e2d\u4f7f\u7528\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff1f<\/h2>\n<p>React \u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u8981\u4f7f\u7528 React \u4e2d\u7684\u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u958b\u767c\u8005\u9700\u8981\u5148\u5b9a\u7fa9\u4e00\u500b <strong>state<\/strong> \u7269\u4ef6\uff0c\u5b83\u5c07\u5305\u542b\u7d44\u4ef6\u7684\u72c0\u614b\u6578\u64da\u3002\u7136\u5f8c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 <strong>setState()<\/strong> \u65b9\u6cd5\u4f86\u66f4\u65b0\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u4f7f\u7528 <strong>getState()<\/strong> \u65b9\u6cd5\u4f86\u7372\u53d6\u7d44\u4ef6\u7684\u72c0\u614b\u3002<\/p>\n<pre class=\"brush: javascript\">\n\/\/ \u5b9a\u7fa9 state \u7269\u4ef6\nconst state = {\n  count: 0\n};\n\n\/\/ \u4f7f\u7528 setState() \u65b9\u6cd5\u66f4\u65b0\u7d44\u4ef6\u7684\u72c0\u614b\nfunction setState(newState) {\n  state.count = newState;\n}\n\n\/\/ \u4f7f\u7528 getState() \u65b9\u6cd5\u7372\u53d6\u7d44\u4ef6\u7684\u72c0\u614b\nfunction getState() {\n  return state.count;\n}\n<\/pre>\n<p>\u6b64\u5916\uff0c\u958b\u767c\u8005\u9084\u53ef\u4ee5\u4f7f\u7528 <strong>Context API<\/strong> \u4f86\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u7d44\u4ef6\u7684\u72c0\u614b\u3002Context API \u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5728\u4e0d\u540c\u7d44\u4ef6\u4e4b\u9593\u5171\u4eab\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<pre class=\"brush: javascript\">\n\/\/ \u5b9a\u7fa9 Context\nconst MyContext = React.createContext();\n\n\/\/ \u4f7f\u7528 Context.Provider \u4f86\u63d0\u4f9b\u72c0\u614b\nfunction App() {\n  const [state, setState] = useState({\n    count: 0\n  });\n\n  return (\n    <MyContext.Provider value={{ state, setState }}>\n      <ChildComponent \/>\n    <\/MyContext.Provider>\n  );\n}\n\n\/\/ \u4f7f\u7528 Context.Consumer \u4f86\u7372\u53d6\u72c0\u614b\nfunction ChildComponent() {\n  return (\n    <MyContext.Consumer>\n      {({ state, setState }) => (\n        <div>\n          <h1>{state.count}<\/h1>\n          <button onClick={() => setState({ count: state.count + 1 })}>\n            Increase\n          <\/button>\n        <\/div>\n      )}\n    <\/MyContext.Consumer>\n  );\n}\n<\/pre>\n<p>\u7e3d\u4e4b\uff0cReact \u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u4e26\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528\u9ad8\u7d1a\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u5f9e\u57fa\u672c\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\u5230\u66f4\u9ad8\u7d1a\u7684\u7d44\u4ef6\u72c0\u614b\u7ba1\u7406\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u5011\u4f86\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u64f4\u5c55\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[184,183],"tags":[182,181],"class_list":["post-5751","post","type-post","status-publish","format-standard","hentry","category-react","category-react-js","tag-react","tag-react-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1uL","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=5751"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5751\/revisions"}],"predecessor-version":[{"id":5752,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5751\/revisions\/5752"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}