{"id":30296,"date":"2024-11-25T13:27:45","date_gmt":"2024-11-25T05:27:45","guid":{"rendered":"https:\/\/fwq.ai\/blog\/30296\/"},"modified":"2024-11-25T13:27:45","modified_gmt":"2024-11-25T05:27:45","slug":"%e5%b0%8f%e7%a8%8b%e5%ba%8f%e5%bc%80%e5%8f%91%e4%b9%8b%e5%88%a9%e7%94%a8co%e5%a4%84%e7%90%86%e5%bc%82%e6%ad%a5%e6%b5%81%e7%a8%8b%e7%9a%84%e5%ae%9e%e4%be%8b%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/30296\/","title":{"rendered":"\u5c0f\u7a0b\u5e8f\u5f00\u53d1\u4e4b\u5229\u7528co\u5904\u7406\u5f02\u6b65\u6d41\u7a0b\u7684\u5b9e\u4f8b\u6559\u7a0b"},"content":{"rendered":"

\u6700\u8fd1\u5728\u5b66\u4e60\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\uff0c\u4e0b\u9762\u5c31\u5b66\u4e60\u7684\u5185\u5bb9\u8fdb\u884c\u603b\u7ed3\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u4e86\u5173\u4e8e\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u5229\u7528co\u5904\u7406\u5f02\u6b65\u6d41\u7a0b\u7684\u65b9\u6cd5\uff0c\u6587\u4e2d\u7ed9\u51fa\u4e86\u8be6\u7ec6\u7684\u4ecb\u7ecd\u548c\u793a\u4f8b\u4ee3\u7801\u4f9b\u5927\u5bb6\u53c2\u8003\u5b66\u4e60\uff0c\u9700\u8981\u7684\u670b\u53cb\u4eec\u4e0b\u9762\u6765\u4e00\u8d77\u770b\u770b\u5427\u3002<\/p>\n

\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u7684\u662f\u5173\u4e8e\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u5229\u7528co\u5904\u7406\u5f02\u6b65\u6d41\u7a0b\u7684\u65b9\u6cd5\u6559\u7a0b\uff0c\u5206\u4eab\u51fa\u6765\u4f9b\u5927\u5bb6\u53c2\u8003\u5b66\u4e60\uff0c\u9700\u8981\u7684\u670b\u53cb\u4eec\u4e0b\u9762\u6765\u770b\u770b\u8be6\u7ec6\u7684\u4ecb\u7ecd\uff1a<\/p>\n

co<\/strong><\/span><\/p>\n

co\u662f\u4e00\u4e2a\u57fa\u4e8eES6 Generator\u7279\u6027\u5b9e\u73b0\u7684\u3010\u5f02\u6b65\u6d41\u7a0b\u540c\u6b65\u5316\u3011\u5199\u6cd5\u7684\u5de5\u5177\u5e93\u3002<\/p>\n

co\u9700\u8981\u4f7f\u7528Promise\u7279\u6027\uff0c\u6240\u4ee5\uff0c\u6211\u4eec\u5148\u6765\u521b\u5efa\u4e00\u4e2a\u4f7f\u7528Promise\u6765\u5904\u7406\u7684\u5f02\u6b65\u65b9\u6cd5\uff1a<\/p>\n

function myAsyncFunc() {\r\n return new Promise(function (resolve, reject) {\r\n setTimeout(function () {\r\n console.log(\"myAsyncFunction done!\");\r\n resolve({ \r\n data: \"Hello,World\" \r\n })\r\n }, 2000);\r\n });\r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7136\u540e\uff0c\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8bdd\uff0c\u5c31\u4f1a\u5982\u4e0b\uff0c\u4f7f\u7528\u4e86then\/catch\u7684\u56de\u8c03\u65b9\u5f0f\u6765\u5904\u7406\u8c03\u7528\u7ed3\u679c\u548c\u5f02\u5e38\u5904\u7406\uff1a<\/p>\n
myAsyncFunc().then(function (result) {\r\n console.log(result.data); \/\/Hello,World\r\n}).catch(function (err) {\r\n \/\/...\r\n});<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u800c\u5982\u679c\u662f\u4f7f\u7528co\u7684\u8bdd\uff0c\u5219\u4f1a\u50cf\u8fd9\u6837\uff1a<\/p>\n
co(function *() {\r\n try {\r\n var result = yield myAsyncFunc();\r\n console.log(result.data); \/\/Hello,World\r\n } catch(e) {\r\n }\r\n\r\n});<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\u7684\u5199\u6cd5\uff0c\u662f\u4e0d\u662f\u5c31\u662f\u6211\u4eec\u975e\u5e38\u719f\u6089\u7684\uff0c\u6bd4\u8f83\u7b26\u5408\u903b\u8f91\u601d\u7ef4\u4e60\u60ef\u7684\u540c\u6b65\u5199\u6cd5\u4e86\uff1f<\/p>\n
\u5173\u4e8eco\u7684\u7528\u6cd5\uff0c\u5728\u672c\u6587\u4e2d\u6211\u5c31\u4e0d\u591a\u5c55\u5f00\u4e86\uff0c\u6709\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u81ea\u884c\u641c\u7d22\u76f8\u5173\u8d44\u6599\u3002\u6211\u4eca\u5929\u8981\u8bb2\u7684\u662f\uff0c\u5982\u4f55\u5728\u5c0f\u7a0b\u5e8f\u73af\u5883\u4e0b\u9762\u6210\u529f\u7684\u4f7f\u7528co\u3002<\/p>\n
1. \u5f00\u542f\u8bed\u8a00\u8f6c\u8bd1\u9009\u9879<\/strong><\/span><\/p>\n
\u7531\u4e8e\u8981\u4f7f\u7528\u5230ES6\u7684generator\uff0c\u800c\u53c8\u8981\u4e3a\u4e86\u517c\u5bb9\u6027\uff0c\u6211\u4eec\u5fc5\u987b\u5bf9ES6\u7684\u8bed\u6cd5\u8fdb\u884c\u964d\u7ea7\u8f6c\u8bd1\uff0c\u53d8\u6210ES5\u3002<\/p>\n
\"\u5c0f\u7a0b\u5e8f\u5f00\u53d1\u4e4b\u5229\u7528co\u5904\u7406\u5f02\u6b65\u6d41\u7a0b\u7684\u5b9e\u4f8b\u6559\u7a0b\u63d2\u56fe\"
\u5f00\u542f\u8bed\u8a00\u8f6c\u8bd1\u9009\u9879<\/p>\n
2. \u5f15\u5165generator\u652f\u6491\u5e93<\/strong><\/span><\/p>\n
\u7ecf\u8fc7\u8f6c\u8bd1\u540e\u7684\u4ee3\u7801\uff0c\u9700\u8981\u4f9d\u8d56\u4e00\u4e2aregeneratorRuntime\uff0c\u624d\u80fd\u652f\u6301generator\u7279\u6027\u3002Facebook\u5f00\u6e90\u7684\u4e00\u4e2aregenerator\u5c31\u662f\u8fd9\u6837\u4e00\u4e2a\u5e93\uff0cGithub\u5730\u5740\uff1agithub.com\/facebook\/regenerator\/<\/p>\n
\u4f60\u53ef\u4ee5\u901a\u8fc7npm\u6765\u4e0b\u8f7d\u8fd9\u4e2aregenerator\u5e93\uff1a<\/p>\n
npm install regenerator<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7136\u540e\u5c06\u4e0b\u8f7d\u6587\u4ef6\u4e2d\u540d\u4e3aregenerator-runtime.js\u7684\u6587\u4ef6\u62ff\u51fa\u6765\uff0c\u653e\u5230\u6211\u4eec\u7684\u5c0f\u7a0b\u5e8f\u4ee3\u7801\u4e2d\u53bb\u3002<\/p>\n
3.\u4e0b\u8f7dco\u548cPromise\u5e93<\/strong><\/span><\/p>\n
\u63a5\u7740\uff0c\u901a\u8fc7npm\u4e0b\u8f7dco\u5e93\uff1a<\/p>\n
npm install co<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5c06\u4e0b\u8f7d\u6587\u4ef6\u4e2d\u540d\u4e3aco.js\u6587\u4ef6\u62ff\u51fa\u6765\uff0c\u653e\u5230\u6211\u4eec\u7684\u5c0f\u7a0b\u5e8f\u4ee3\u7801\u4e2d\u53bb\u3002<\/p>\n
\u56e0\u4e3a\u9700\u8981\u4f9d\u8d56Promise\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u5f15\u5165\u4e00\u4e2aPromise\u5b9e\u73b0\u5e93\u3002\u5728\u6b64\u6211\u4eec\u9009\u7528\u4e00\u4e2a\u5c0f\u800c\u517c\u5bb9\u6027\u597d\u7684\u5e93es6-promise\u3002\u540c\u6837\u53ef\u4ee5\u901a\u8fc7npm\u4e0b\u8f7d\uff1a<\/p>\n
npm install es6-promise<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5c06es6-promise.js\u653e\u5230\u6211\u4eec\u7684\u5c0f\u7a0b\u5e8f\u4ee3\u7801\u4e2d\u3002<\/p>\n
4.\u5f15\u5165\u5c0f\u7a0b\u5e8f\u4ee3\u7801\u4e2d<\/strong><\/span><\/p>\n
\u4f7f\u7528\u524d\uff0c\u5c06\u8fd9\u4e9b\u5e93\u6b63\u786e\u7684\u5f15\u5165\u6211\u4eec\u7684\u4ee3\u7801\uff1a<\/p>\n
const Promise = global.Promise = require('..\/..\/libs\/es6-promise')\r\nconst regeneratorRuntime = global.regeneratorRuntime = require('..\/..\/libs\/regenerator-runtime')\r\nconst co = require('..\/..\/libs\/co')<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u597d\u4e86\uff0c\u63a5\u4e0b\u6765\u5c31\u53ef\u4ee5\u5f00\u59cb\u6109\u5feb\u7684\u4f7f\u7528co\u8fdb\u884c\u7f16\u7a0b\u4e86\u3002<\/p>\n
\u3010\u76f8\u5173\u63a8\u8350\u3011<\/p>\n
1. <\/p>\n
2. <\/p>\n
3. <\/p>\n
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