{"id":449,"date":"2026-06-10T21:40:01","date_gmt":"2026-06-10T13:40:01","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=449"},"modified":"2026-06-16T21:50:14","modified_gmt":"2026-06-16T13:50:14","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-effect-%e6%96%b9%e6%b3%95%e5%89%8d%e9%9d%a2%e5%bf%85%e9%a1%bb%e5%8a%a0","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/06\/10\/%e4%b8%ba%e4%bb%80%e4%b9%88-effect-%e6%96%b9%e6%b3%95%e5%89%8d%e9%9d%a2%e5%bf%85%e9%a1%bb%e5%8a%a0\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 effect \u65b9\u6cd5\u524d\u9762\u5fc5\u987b\u52a0 *"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1. \u6838\u5fc3\uff1a<code>*<\/code> \u4ee3\u8868 Generator \u751f\u6210\u5668\u51fd\u6570<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>function*<\/code> \u662f ES6 \u8bed\u6cd5\uff0c\u53eb<strong>\u751f\u6210\u5668\u51fd\u6570<\/strong>\uff0c\u914d\u5408 <code>yield<\/code> \u5173\u952e\u5b57\u4f7f\u7528\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dva \u7684 effects \u5168\u90e8\u8981\u6c42\u5199\u6210\u751f\u6210\u5668\u51fd\u6570\uff0c<strong>\u4e0d\u52a0 <code>*<\/code> \u76f4\u63a5\u62a5\u9519\u3001<code>yield<\/code> \u65e0\u6cd5\u751f\u6548<\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. <code>yield<\/code> \u53ea\u80fd\u5728\u5e26 <code>*<\/code> \u7684\u51fd\u6570\u5185\u4f7f\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u7801\u91cc\u6709 <code>yield call(xxx)<\/code>\u3001<code>yield put()<\/code>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>yield<\/code> \u662f\u6682\u505c\u3001\u7b49\u5f85\u5f02\u6b65\u6267\u884c\u5b8c\u6210\u7684\u5173\u952e\u5b57\uff1b<\/li>\n\n\n\n<li>\u666e\u901a\u51fd\u6570 <code>login(){}<\/code> \u91cc<strong>\u4e0d\u5141\u8bb8\u5199 yield<\/strong>\uff0c\u6d4f\u89c8\u5668\u76f4\u63a5\u62a5\u8bed\u6cd5\u9519\u8bef\uff1b<\/li>\n\n\n\n<li>\u53ea\u6709 <code>*login(){}<\/code> \u751f\u6210\u5668\u51fd\u6570\uff0c\u624d\u80fd\u8bc6\u522b <code>yield<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3. Dva \u4e3a\u4ec0\u4e48 effect \u5f3a\u5236\u7528 Generator\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">effect \u4e13\u95e8\u5904\u7406<strong>\u5f02\u6b65\u903b\u8f91<\/strong>\uff08\u63a5\u53e3\u8bf7\u6c42\u3001\u5ef6\u65f6\u3001\u591a\u4e2a\u4e32\u884c\u63a5\u53e3\uff09\uff0c\u9760 <code>yield<\/code> \u5b9e\u73b0\u540c\u6b65\u5199\u6cd5\u7684\u5f02\u6b65\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>yield call(api)<\/code>\uff1a\u6682\u505c\u6267\u884c\uff0c\u7b49\u5f85\u63a5\u53e3\u8bf7\u6c42\u5b8c\u6210\u62ff\u5230\u7ed3\u679c\uff0c\u518d\u5f80\u4e0b\u8d70\uff1b<\/li>\n\n\n\n<li>\u53ef\u4ee5\u4e32\u884c\u5199\u591a\u4e2a\u8bf7\u6c42\uff0c\u903b\u8f91\u6e05\u6670\uff0c\u4e0d\u7528\u5d4c\u5957\u56de\u8c03 \/async await\uff1b<\/li>\n\n\n\n<li><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>*login({payload}, {call, put}) {\n  \/\/ \u5148\u7b49\u767b\u5f55\u63a5\u53e3\u5b8c\u6210\n  const res = yield call($http.userLogin, payload);\n  \/\/ \u62ff\u5230\u7ed3\u679c\u540e\uff0c\u518d\u66f4\u65b0state\n  yield put({ type: 'saveUserInfo', payload: res.data });\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u548c async\/await \u7b80\u5355\u7c7b\u6bd4<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Generator \u5199\u6cd5\uff08Dva effect \u56fa\u5b9a\u683c\u5f0f\uff09\n*login(_, {call}) {\n  const res = yield call(api());\n}\n\n\/\/ \u7b49\u4ef7\u666e\u901a\u5f02\u6b65\u5199\u6cd5\nasync login() {\n  const res = await api();\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>*<\/code> \u2248 <code>async<\/code><\/li>\n\n\n\n<li><code>yield<\/code> \u2248 <code>await<\/code><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u8865\u5145\u533a\u5206 reducer \/effect<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>reducers<\/code>\uff1a\u7eaf\u540c\u6b65\u51fd\u6570\uff0c<strong>\u4e0d\u7528\u52a0 <code>*<\/code>\u3001\u4e0d\u80fd\u7528 yield<\/strong>\uff0c\u53ea\u4fee\u6539 state\uff1b<\/li>\n\n\n\n<li><code>effects<\/code>\uff1a\u5f02\u6b65\u903b\u8f91\u4e13\u7528\uff0c<strong>\u5fc5\u987b\u52a0 <code>*<\/code>\u3001\u4f9d\u9760 yield \u5904\u7406\u5f02\u6b65<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\u5b8c\u6574\u533a\u5206\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>export default {\n  namespace: 'user',\n  state: { userInfo: null },\n  \/\/ reducer\uff1a\u540c\u6b65\uff0c\u65e0*\n  reducers: {\n    saveInfo(state, { payload }) {\n      state.userInfo = payload;\n    }\n  },\n  \/\/ effect\uff1a\u5f02\u6b65\uff0c\u5fc5\u987b\u5e26*\n  effects: {\n    *login({ payload }, { call, put }) {\n      const data = yield call($http.userLogin, payload);\n      yield put({ type: 'saveInfo', payload: data });\n    }\n  }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. \u6838\u5fc3\uff1a* \u4ee3\u8868 Generator \u751f\u6210\u5668\u51fd..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,11],"tags":[],"class_list":["post-449","post","type-post","status-publish","format-standard","hentry","category-react-","category-front"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/react-%e5%89%8d%e7%ab%af\/\" rel=\"category tag\">React<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/\" rel=\"category tag\">\u524d\u7aef<\/a>","tag_info":"\u524d\u7aef","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=449"}],"version-history":[{"count":1,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/449\/revisions"}],"predecessor-version":[{"id":450,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/449\/revisions\/450"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}