{"id":32417,"date":"2024-11-25T15:46:07","date_gmt":"2024-11-25T07:46:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/32417\/"},"modified":"2024-11-25T15:46:07","modified_gmt":"2024-11-25T07:46:07","slug":"%e5%b0%8f%e7%a8%8b%e5%ba%8f%e5%8a%a0%e8%bd%bd%e5%99%a8%e7%9a%84%e5%ae%9e%e7%8e%b0%ef%bc%9a%e6%8c%89%e9%9c%80%e9%a2%84%e5%8a%a0%e8%bd%bd%e8%bf%9c%e7%a8%8b%e5%9b%be%e7%89%87%e8%b5%84%e6%ba%90","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/32417\/","title":{"rendered":"\u5c0f\u7a0b\u5e8f\u52a0\u8f7d\u5668\u7684\u5b9e\u73b0\uff1a\u6309\u9700\u9884\u52a0\u8f7d\u8fdc\u7a0b\u56fe\u7247\u8d44\u6e90"},"content":{"rendered":"

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5e26\u6765\u7684\u5185\u5bb9\u662f\u5173\u4e8e\u5c0f\u7a0b\u5e8f\u52a0\u8f7d\u5668\u7684\u5b9e\u73b0\uff1a\u6309\u9700\u9884\u52a0\u8f7d\u8fdc\u7a0b\u56fe\u7247\u8d44\u6e90\uff0c\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u6709\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<\/p>\n

\u6700\u8fd1\u505ah5\u5f00\u53d1\u9047\u5230\u4e2a\u95ee\u9898\uff0c\u4e3a\u4e86\u9632\u6b62\u9875\u9762\u6253\u5f00\u65f6\uff0c\u51fa\u73b0\u5927\u56fe\u52a0\u8f7d\u7f13\u6162\u7684\u60c5\u51b5\uff0c\u5199\u4e86\u4e00\u4e2a\u56fe\u7247\u8d44\u6e90\u7ba1\u7406\u5668\uff0c\u4eca\u5929\u987a\u4fbf\u5b9e\u73b0\u4e86\u4e00\u4e0b\u5c0f\u7a0b\u5e8f<\/span>\u7248\u3002<\/p>\n

\u7279\u522b\u8bf4\u660e\u4e00\u4e0b\uff0c\u5c0f\u7a0b\u5e8f\u7531\u4e8e\u8d44\u6e90\u5305\u5927\u5c0f\u9650\u5236\uff0c\u5f88\u591a\u56fe\u7247\u8d44\u6e90\u4f1a\u5b58\u653e\u5230CND\u56fe\u7247\u670d\u52a1\u5668\u4e0a\uff0c\u4e3a\u4e86\u5b9e\u73b0\u5c0f\u7a0b\u5e8f\u521d\u59cb\u5316\u65f6\u6309\u9700\u52a0\u8f7d\u8fdc\u7a0b\u56fe\u7247\u8d44\u6e90\uff0c\u5b9e\u73b0\u4e86\u4ee5\u4e0b\u52a0\u8f7d\u5668\uff0c\u5e0c\u671b\u80fd\u89e3\u51b3\u90e8\u5206\u5c0f\u7a0b\u5e8f\u65b0\u4eba\u5f00\u53d1\u8005\u9884\u52a0\u8f7d\u56fe\u7247\u7684\u82e6\u607c\u3002<\/p>\n

\u7279\u522b\u5f3a\u8c03\uff1a<\/strong><\/p>\n

\u672c\u52a0\u8f7d\u5668\u4e3a\u521d\u7ea7\u7248\u672c\uff0c\u6682\u672a\u7814\u7a76\u5176\u4ed6\u5b9e\u73b0\u65b9\u5f0f\uff0c\u5f53\u524d\u5b9e\u73b0\u65b9\u5f0f\u9700\u8981\u5728\u5fae\u4fe1\u516c\u4f17\u5e73\u53f0<\/strong>->\u8bbe\u7f6e<\/strong>->downloadFile\u5408\u6cd5\u57df\u540d<\/strong>\uff0c\u4e2d\u6dfb\u52a0\u60f3\u8981\u52a0\u8f7d\u7684\u56fe\u7247\u6240\u5728\u670d\u52a1\u5668\u5408\u6cd5\u57df\u540d\u3002<\/p>\n

\u539f\u7406\u4ecb\u7ecd\uff1a<\/strong><\/p>\n

\u4f7f\u7528\u5c0f\u7a0b\u5e8f\u81ea\u5e26API\u8bfb\u53d6\u8fdc\u7a0b\u56fe\u7247\u8d44\u6e90\uff1a<\/p>\n

wx.getImageInfo({\n src: 'images\/a.jpg',\n success: function (res) {\n console.log(res.width)\n console.log(res.height)\n }\n})<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u4e2a\u63a5\u53e3\u53ef\u4ee5\u521b\u5efa\u56fe\u7247\u7ec4\u4ef6\u5bf9\u8c61\u5e76\u8fd4\u56de\u56fe\u7247\u52a0\u8f7d\u72b6\u6001\u3002<\/p>\n
\u52a0\u8f7d\u5668\u7528\u6cd5\uff1a<\/strong><\/p>\n
1\u3001\u5728app.js\u7684\u540c\u7ea7\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2aImageSource.js\u4f5c\u4e3a\u56fe\u7247\u8d44\u6e90\u7684\u8def\u5f84\u7ba1\u7406\u6587\u4ef6\uff08\u53ef\u4ee5\u6839\u636e\u60c5\u51b5\u6539\u4e3a\u5176\u4ed6\u6587\u4ef6\u540d\u79f0\uff09\u3002<\/p>\n
2\u3001\u5728utils\u6587\u4ef6\u5939\u4e0b\u653e\u5165ImageLoader.js\u6216ImageLoader.min.js\uff08\u9644\u4ef6\uff09\u3002<\/p>\n
3\u3001\u6839\u636e\u9700\u8981\u5728\u5bf9\u5e94\u7684\u6587\u4ef6\u4e2d\u521b\u5efaImageLoader\u5bf9\u8c61\uff08\u770b\u4e0b\u6587\uff09\u3002<\/p>\n
\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n
1\u3001\u8f7d\u5165\u6587\u4ef6\uff1a<\/p>\n
const ImageLoader = require('.\/utils\/ImageLoader.min.js');\nconst ImageSource = require('.\/imageSource.js');<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
ImageLoader.min.js \u4e3a\u52a0\u8f7d\u5668\u6e90\u6587\u4ef6\u3002<\/p>\n
imageSource.js \u4e3a\u56fe\u7247\u8d44\u6e90\u8def\u5f84\u6587\u4ef6\u3002<\/p>\n
2\u3001\u521b\u5efaImageLoader\u5bf9\u8c61\u3002<\/p>\n
new ImageLoader({\n base: ImageSource.BASE,\n source: [ImageSource],\n loading: res =&gt; {\n \/\/ \u53ef\u4ee5\u505a\u8fdb\u5ea6\u6761\u52a8\u753b\n console.log(res);\n },\n loaded: res =&gt; {\n \/\/ \u53ef\u4ee5\u52a0\u8f7d\u5b8c\u6bd5\u52a8\u753b\n console.log(res);\n }\n });<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u53c2\u6570<\/p>\n
base : String \u56fe\u7247\u8d44\u6e90\u7684\u57fa\u7840\u8def\u5f84 \u5fc5\u586b \u793a\u4f8b\uff1a “https:\/\/image.example.com\/static\/images\/”<\/p>\n
source : Array \u9700\u8981\u9884\u52a0\u8f7d\u7684\u56fe\u7247\u8d44\u6e90 \u5fc5\u586b \u793a\u4f8b\uff1a [ImageSource.banners, ImageSource.imageList]<\/p>\n
loading : function \u56fe\u7247\u52a0\u8f7d\u4e2d\u7684\u56de\u8c03\u65b9\u6cd5 \u975e\u5fc5\u586b \u793a\u4f8b\uff1a<\/p>\n
loaded : funciton \u56fe\u7247\u8bb0\u8f7d\u5b8c\u6210\u540e\u7684\u56de\u8c03 \u975e\u5fc5\u586b \u793a\u4f8b:<\/p>\n
\u52a0\u8f7d\u5668\uff08ImageLoader.js\uff09\u6e90\u7801\uff1a<\/strong><\/p>\n
let base = 0;\nlet Img = function(src) {\n this.src = src;\n this.status = false;\n this.fail = false;\n}\n \nlet loop = (o, res) =&gt; {\n let tem = Object.keys(o);\n tem.map(v =&gt; {\n if (typeof o[v] === 'object') {\n loop(o[v], res);\n } else {\n if(v === 'BASE') {\n base = o[v];\n } else {\n res.push(o[v]);\n }\n }\n });\n}\n \nfunction ImageLoader(obj) {\n let arr = [];  if(obj.loading) {\n this.loadingcallback = obj.loading;\n }\n if(obj.loaded) {\n this.loadedcallback = obj.loaded;\n }\n \n if(obj.base) {\n base = obj.base\n }\n this.insert = (item) =&gt; {\n arr.push(item);\n };\n \n this.init = (o) =&gt; {\n let res = [];\n loop(o, res);\n console.log(res)\n res.map((v) =&gt; {\n this.insert(new Img(v));\n });\n this.load();\n };\n \n this.load = () =&gt; {\n this.start = (new Date).getTime();\n arr.map((v) =&gt; {\n let src = base ? base + v.src: v.src;\n wx.getImageInfo({\n src: src,\n success: res =&gt; {\n v.status = true;\n },\n fail: err =&gt; {\n v.fail = true;\n }\n })\n });\n let timer = setInterval(() =&gt; {\n let status = this.isLoaded();\n if (status) {\n clearTimeout(timer);\n }\n }, 200);\n \n setTimeout(() =&gt; {\n clearTimeout(timer);\n }, 60000);\n };\n \n this.isLoaded = () =&gt; {\n let status = true,\n count = 0,\n fail = 0;\n arr.map((v) =&gt; {\n if (!v.status) {\n status = false;\n } else {\n count += 1;\n }\n if(v.fail) {\n status = true;\n fail += 1;\n }\n });\n if(status) {\n if(this.loadedcallback) {\n this.loadedcallback({\n status: true,\n timecost: (new Date).getTime() - this.start,\n success: count,\n fail: fail,\n totalcount: arr.length\n })\n }\n } else {\n if(this.loadingcallback) {\n this.loadingcallback({\n status: false,\n percent: count \/ arr.length\n });\n }\n }\n return status;\n };\n if(obj.source) {\n this.init(obj.source);\n }\n}\nmodule.exports = ImageLoader<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u56fe\u7247\u8d44\u6e90\u8def\u5f84\u6587\u4ef6\uff08imageSource.js\uff09\u6e90\u7801\uff1a<\/strong><\/p>\n
module.exports = {\n \"BASE\": \"https:\/\/img.caibeitv.com\/static_project\/teacherTest\/static\/img\/\",\n \"single1\": \"ghost.4449aa4.png\",\n \"single2\": \"ghost.4449aa4.png\",\n \"single3\": \"ghost.4449aa4.png\",\n \"single4\": \"ghost.4449aa4.png\",\n \"pages\": {\n \"index\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"user\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"home\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"login\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"]\n },\n \"imageList\": [\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\"\n ],\n \"folders\": {\n \"page1\": \"ghost.4449aa4.png\",\n \"page2\": \"ghost.4449aa4.png\",\n \"inner\": [\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\"\n ],\n \"home\": {\n \"poster\": \"ghost.4449aa4.png\"\n }\n }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8bf4\u660e\uff1a<\/p>\n
BASE \u5b57\u6bb5\u5fc5\u586b \u6839\u636e\u81ea\u6211\u9700\u8981\u586b\u5199\u3002<\/p>\n
\u5176\u4ed6\u56fe\u7247\u8d44\u6e90\u652f\u6301\uff1a<\/p>\n
1\u3001\u76f4\u63a5key\uff1avalue\u5f62\u5f0f\u628a\u56fe\u7247\u8def\u5f84\u5199\u5165\uff0c\u5982\uff1a<\/p>\n
\"single1\": \"ghost.4449aa4.png\"<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2\u3001\u7c7b\u4f3c\u4e8epages\u76ee\u5f55\u628a\u6bcf\u4e2a\u9875\u9762\u7684\u8fdc\u7a0b\u8d44\u6e90\u5199\u5165\u5230\u5bf9\u5e94\u4f4d\u7f6e\u4e0b\uff0c\u65b9\u4fbf\u5f15\u7528\u548c\u7ba1\u7406\uff0c\u5982\uff1a<\/p>\n
\"pages\": {\n \"index\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"user\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"home\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"],\n \"login\": [\"ghost.4449aa4.png\", \"ghost.4449aa4.png\"]\n },<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3\u3001\u76f4\u63a5\u4ee5\u6570\u7ec4\u65b9\u5f0f\u628a\u56fe\u7247\u5806\u653e\u5728\u4e00\u4e2a\u6570\u7ec4\u91cc\uff0c\u5982\uff1a<\/p>\n
\"imageList\": [\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\"\n ]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
4\u3001\u968f\u610f\u7684\u8d44\u6e90\u6570\u7ec4\uff0c\u5bf9\u8c61\u5d4c\u5957\uff0c\u5982\uff1a<\/p>\n
\"folders\": {\n \"page1\": \"ghost.4449aa4.png\",\n \"page2\": \"ghost.4449aa4.png\",\n \"inner\": [\n \"ghost.4449aa4.png\",\n \"ghost.4449aa4.png\"\n ],\n \"home\": {\n \"poster\": \"ghost.4449aa4.png\"\n }\n }<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\u5c31\u5b8c\u6210\u4e86\u6574\u4e2a\u8fdc\u7a0b\u56fe\u7247\u8d44\u6e90\u52a0\u8f7d\u5668\u7684\u914d\u7f6e\uff0c\u53ef\u4ee5\u5728new ImageLoader() \u5bf9\u8c61\u7684 loading, loaded\u56de\u8c03\u4e2d\u770b\u5230\u56fe\u7247\u9884\u52a0\u8f7d\u7684\u6700\u7ec8\u72b6\u6001status\uff0c\u6570\u91cftotalcount\uff0c\u6210\u529f\u52a0\u8f7d\u7684\u56fe\u7247\u6570\u91cfsuccess\uff0c\u52a0\u8f7d\u5931\u8d25\u7684\u56fe\u7247\u6570\u91cffail, \u52a0\u8f7d\u56fe\u7247\u7684\u603b\u8ba1\u8017\u65f6timecost\uff08\u5355\u4f4dms\uff09\u3002<\/p>\n
\u521b\u5efaImageLoader\u5bf9\u8c61\u65f6source\u5b57\u6bb5\u7684\u8bf4\u660e\uff1a<\/p>\n
new ImageLoader({\nbase: ImageSource.BASE,\nsource: [ImageSource],\nloading: res =&gt; {\n\/\/ \u53ef\u4ee5\u505a\u8fdb\u5ea6\u6761\u52a8\u753b\nconsole.log(res);\n},\nloaded: res =&gt; {\n\/\/ \u53ef\u4ee5\u52a0\u8f7d\u5b8c\u6bd5\u52a8\u753b\nconsole.log(res);\n}\n});<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
source\u5b57\u6bb5\u63a5\u53d7\u4e00\u4e2aArray\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u4ee5\u4e0a\u6587\u4e2dimageSource.js<\/strong>\u4e2d\u7684\u914d\u7f6e\u6765\u8bf4\uff0c\u5199\u4e86\u5f88\u591a\u4e0d\u540c\u683c\u5f0f\u7684\u6570\u636e\uff0c\u4f7f\u7528<\/p>\n
const ImageSource = require('.\/imageSource.js');<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5f15\u5165\u540e\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528ImageSource\u6765\u8bfb\u53d6\u5404\u4e2a\u90e8\u5206\u7684\u6570\u636e\uff0c\u56e0\u6b64\u5728\u914d\u7f6esource\u5b57\u6bb5\u65f6\u53ef\u4ee5\u76f4\u63a5\u628a\u6574\u4e2aImageSource\u5bf9\u8c61\u653e\u5165\u8fdb\u53bb<\/p>\n
source: [ImageSource]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e5f\u53ef\u4ee5\u6839\u636e\u9879\u76ee\u9700\u8981\u53ea\u52a0\u8f7d\u5176\u4e2d\u4e00\u90e8\u5206\u8d44\u6e90\uff0c\u5982\uff1a<\/p>\n
source: [ImageSource.imageList, ImageSource.single2]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\u52a0\u8f7d\u5668\u5728\u6267\u884c\u65f6\u5c31\u4f1a\u53ea\u8f7d\u5165source\u4e2d\u5199\u5165\u7684\u90e8\u5206\uff0c\u800c\u4e0d\u662f\u6574\u4e2aImageSource\u3002<\/p>\n
\u6700\u540e\uff0c\u5728\u52a0\u8f7d\u8fc7\u7a0b\u4e2d\u5982\u679c\u8fc7\u4e8e\u8017\u65f6\uff0c\u53ef\u4ee5\u9009\u62e9\u5728\u6bcf\u4e2a\u9875\u9762\u7684onLoad\u91cc\u5355\u72ec\u52a0\u8f7d\u8d44\u6e90\uff0c\u505a\u6cd5\u7c7b\u4f3c\u4e8e\u5728app\u91cc\u8c03\u7528\uff0c\u672c\u6587\u7684\u793a\u4f8b\u662f\u5199\u5728app.js\u7684onLaunch\u4e2d\u3002\u5982\u679c\u52a0\u8f7d\u65f6\u95f4\u8fc7\u957f\u53ef\u4ee5\u505a\u4e00\u4e2a\u8fdb\u5ea6\u6761\u6216\u8005\u52a0\u8f7d\u52a8\u753b\uff0c\u4f18\u5316\u542f\u52a8\u4f53\u9a8c\u3002\u9884\u52a0\u8f7d\u8fc7\u7684\u56fe\u7247\u4f1a\u5728\u5fae\u4fe1\u5185\u5b58\u4e2d\u7f13\u5b58\u4e00\u5230\u5c0f\u7a0b\u5e8f\u8fdb\u7a0b\u88ab\u5173\u95ed\uff0c\u56e0\u6b64\u5728\u968f\u540e\u7684\u9875\u9762\u91cc\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u56fe\u7247\u3002<\/p>\n
const app = getApp();\nconst imgSource = require('..\/..\/imageSource.js');\nPage({\n data: {\n base: imgSource.BASE,\n src: imgSource.single1\n },\n onLoad: function () {\n console.log(imgSource)\n }\n})<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u9875\u9762\u4e0a\u7684Image\u4f1a\u7acb\u5373\u663e\u793a\uff0c\u4e0d\u9700\u8981\u91cd\u65b0\u53d1\u8d77\u52a0\u8f7d\u56fe\u7247\u8bf7\u6c42\u3002<\/p>\n
\u76f8\u5173\u63a8\u8350\uff1a<\/p>\n
<\/p>\n<\/p>\n
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