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AngularJs 動態載入模組和依賴

高洛峰

Mar 25, 2017 pm 04:11 PM

最近專案比較忙額，白天要上班，晚上回來還需要做Angular知識點的ppt給同事，畢竟年底要辭職了，專案的後續開發還是需要有人接手的，所以就佔用了晚上學習的時間。本來一直不打算寫這些第三方插件的學習筆記，不過覺得按需加載模組並且成功使用這個確實是個好處，還是記錄下來吧。基於本獸沒怎麼深入的使用requireJs，所以本獸不知道這個和requireJs有什麼區別，也不能清晰的說明這到底算不算Angular的按需加載。

為了實現這篇學習筆記知識點的效果，我們需要用到：

angular:https://github.com/angular/angular.js

ui-router:https://github.com/angular -ui/ui-router

ocLazyLoad:https://github.com/ocombe/ocLazyLoad

廢話不多說，進入正題...

首先我們看下文件結構：

Angular-ocLazyLoad           --- demo文件夹
  Scripts               --- 框架及插件文件夹
    angular-1.4.7          --- angular 不解释
    angular-ui-router        --- uirouter 不解释
    oclazyload           --- ocLazyload 不解释
    bootstrap            --- bootstrap 不解释
    angular-tree-control-master   --- angular-tree-control-master 不解释
    ng-table            --- ng-table 不解释
    angular-bootstrap        --- angular-bootstrap 不解释
  js                 --- js文件夹 针对demo写的js文件
    controllers           --- 页面控制器文件夹
      angular-tree-control.js   --- angular-tree-control控制器代码
      default.js         --- default控制器代码
      ng-table.js         --- ng-table控制器代码
    app.config.js          --- 模块注册及配置代码
    oclazyload.config.js      --- 加载模块配置代码
    route.config.js         --- 路由配置及加载代码
  views                --- html页面文件夹
    angular-tree-control.html    --- angular-tree-control插件的效果页面
    default.html          --- default页面
    ng-table.html          --- ng-table插件效果页面
    ui-bootstrap.html        --- uibootstrap插件效果页面
  index.html             --- 主页面

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做嵌套路由，只是簡單實現單一視圖的路由以展示效果。

我們來看主頁面的程式碼：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <meta charset="utf-8" />
  <title></title>
  <link rel="stylesheet" href="Scripts/bootstrap/dist/css/bootstrap.min.css" />
  <script src="Scripts/angular-1.4.7/angular.js"></script>
  <script src="Scripts/angular-ui-router/release/angular-ui-router.min.js"></script>
  <script src="Scripts/oclazyload/dist/ocLazyLoad.min.js"></script>
  <script src="js/app.config.js"></script>
  <script src="js/oclazyload.config.js"></script>
  <script src="js/route.config.js"></script>
</head>
<body>
<p ng-app="templateApp">
  <p>
    <a href="#/default">主页</a>
    <a href="#/uibootstrap" >ui-bootstrap</a>
    <a href="#/ngtable">ng-table</a>
    <a href="#/ngtree">angular-tree-control</a>
  </p>
  <p ui-view></p>
</p>
</body>
</html>

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在這個頁面，我們只載入了bootstrap的css、angular的js、ui-router的js、ocLazyLoad的js，以及3個設定的js檔案。

再看看四個頁面的html代碼：

angular-tree-control效果頁面

<treecontrol tree-model="ngtree.treeData" class="tree-classic ng-cloak" options="ngtree.treeOptions">
   {{node.title}}
 </treecontrol>

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頁面上有個使用該插件對應的指令。

default頁面

<p class="ng-cloak">
   {{default.value}}
 </p>

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這裡我們只是用來證明載入並正確執行default.js。

ng-table效果頁

<p class="ng-cloak">
  <p class="p-h-md p-v bg-white box-shadow pos-rlt">
    <h3 class="no-margin">ng-table</h3>
  </p>
  <button ng-click="ngtable.tableParams.sorting({})" class="btn btn-default pull-right">Clear sorting</button>
  <p>
    <strong>Sorting:</strong> {{ngtable.tableParams.sorting()|json}}
  </p>
  <table ng-table="ngtable.tableParams" class="table table-bordered table-striped">
    <tr ng-repeat="user in $data">
      <td data-title="&#39;Name&#39;" sortable="&#39;name&#39;">
        {{user.name}}
      </td>
      <td data-title="&#39;Age&#39;" sortable="&#39;age&#39;">
        {{user.age}}
      </td>
    </tr>
  </table>
</p>

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這裡寫了一些簡單的ng-table效果。

ui-bootstrap效果頁面

<span uib-dropdown class="ng-cloak">
   <a href id="simple-dropdown" uib-dropdown-toggle>
     下拉框触发
   </a>
   <ul class="uib-dropdown-menu dropdown-menu" aria-labelledby="simple-dropdown">
     下拉框内容.这里写个效果证明实现动态加载即可
   </ul>
 </span>

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這裡僅寫了個下拉框效果，證明正確加載並使用該插件。

好了，看完了html，我們看下載入配置和路由配置：

"use strict"
var tempApp = angular.module("templateApp",["ui.router","oc.lazyLoad"])
.config(["$provide","$compileProvider","$controllerProvider","$filterProvider",
        function($provide,$compileProvider,$controllerProvider,$filterProvider){
          tempApp.controller = $controllerProvider.register;
          tempApp.directive = $compileProvider.directive;
          tempApp.filter = $filterProvider.register;
          tempApp.factory = $provide.factory;
          tempApp.service =$provide.service;
          tempApp.constant = $provide.constant;
        }]);

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以上程式碼對模組的註冊，只依賴了ui.router和oc.LazyLoad。配置也只是簡單配置了模組，以便在後面的js能辨識到tempApp上的方法。

然後我們再看看ocLazyLoad載入模組的配置：

"use strict"
tempApp
.constant("Modules_Config",[
  {
    name:"ngTable",
    module:true,
    files:[
      "Scripts/ng-table/dist/ng-table.min.css",
      "Scripts/ng-table/dist/ng-table.min.js"
    ]
  },
  {
    name:"ui.bootstrap",
    module:true,
    files:[
      "Scripts/angular-bootstrap/ui-bootstrap-tpls-0.14.3.min.js"
    ]
  },
  {
    name:"treeControl",
    module:true,
    files:[
      "Scripts/angular-tree-control-master/css/tree-control.css",
      "Scripts/angular-tree-control-master/css/tree-control-attribute.css",
      "Scripts/angular-tree-control-master/angular-tree-control.js"
    ]
  }
])
.config(["$ocLazyLoadProvider","Modules_Config",routeFn]);
function routeFn($ocLazyLoadProvider,Modules_Config){
  $ocLazyLoadProvider.config({
    debug:false,
    events:false,
    modules:Modules_Config
  });
};

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路由的配置：

"use strict"
tempApp.config(["$stateProvider","$urlRouterProvider",routeFn]);
function routeFn($stateProvider,$urlRouterProvider){
  $urlRouterProvider.otherwise("/default");
  $stateProvider
  .state("default",{
    url:"/default",
    templateUrl:"views/default.html",
    controller:"defaultCtrl",
    controllerAs:"default",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("js/controllers/default.js");
      }]
    } 
  })
  .state("uibootstrap",{
    url:"/uibootstrap",
    templateUrl:"views/ui-bootstrap.html",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("ui.bootstrap");
      }]
    } 
  })
  .state("ngtable",{
    url:"/ngtable",
    templateUrl:"views/ng-table.html",
    controller:"ngTableCtrl",
    controllerAs:"ngtable",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("ngTable").then(
          function(){
            return $ocLazyLoad.load("js/controllers/ng-table.js");
          }
        );
      }]
    } 
  })
  .state("ngtree",{
    url:"/ngtree",
    templateUrl:"views/angular-tree-control.html",
    controller:"ngTreeCtrl",
    controllerAs:"ngtree",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("treeControl").then(
          function(){
            return $ocLazyLoad.load("js/controllers/angular-tree-control.js");
          }
        );
      }]
    } 
  })
};

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ui-bootstrap的下拉框簡單的實作不需要控制器，那麼我們就只看看ng-table和angular-tree -control的控制器js吧：

ng-table.js

(function(){
"use strict"
tempApp
.controller("ngTableCtrl",["$location","NgTableParams","$filter",ngTableCtrlFn]);
function ngTableCtrlFn($location,NgTableParams,$filter){
  //数据
  var data = [{ name: "Moroni", age: 50 },
         { name: "Tiancum ", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 }];
  this.tableParams = new NgTableParams(  // 合并默认的配置和url参数
    angular.extend({
      page: 1,      // 第一页
      count: 10,     // 每页的数据量
      sorting: {
        name: &#39;asc&#39;   // 默认排序
      }
    },
    $location.search())
    ,{
      total: data.length, // 数据总数
      getData: function ($defer, params) {
        $location.search(params.url()); // 将参数放到url上，实现刷新页面不会跳回第一页和默认配置
        var orderedData = params.sorting ?
            $filter(&#39;orderBy&#39;)(data, params.orderBy()) :data;
        $defer.resolve(orderedData.slice((params.page() - 1) * params.count(), params.page() * params.count()));
      }
    }
  );
};
})();

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angular-tree-control.js

(function(){
"use strict"
tempApp
.controller("ngTreeCtrl",ngTreeCtrlFn);
function ngTreeCtrlFn(){
  //树数据
  this.treeData = [
        {
          id:"1",
          title:"标签1",
          childList:[
            {
              id:"1-1",
              title:"子级1",
              childList:[
                {
                  id:"1-1-1",
                  title:"再子级1",
                  childList:[]
                }
              ]
            },
            {
              id:"1-2",
              title:"子级2",
              childList:[
                {
                  id:"1-2-1",
                  title:"再子级2",
                  childList:[
                    {
                      id:"1-2-1-1",
                      title:"再再子级1",
                      childList:[]
                    }
                  ]
                }
              ]
            },
            {
              id:"1-3",
              title:"子级3",
              childList:[]
            }
          ]
        },
        {
          id:"2",
          title:"标签2",
          childList:[
            {
              id:"2-1",
              title:"子级1",
              childList:[]
            },
            {
              id:"2-2",
              title:"子级2",
              childList:[]
            },
            {
              id:"2-3",
              title:"子级3",
              childList:[]
            }
          ]}
        ,
        {
          id:"3",
          title:"标签3",
          childList:[
            {
              id:"3-1",
              title:"子级1",
              childList:[]
            },
            {
              id:"3-2",
              title:"子级2",
              childList:[]
            },
            {
              id:"3-3",
              title:"子级3",
              childList:[]
            }
          ]
        }
      ];
  //树配置
  this.treeOptions = {
    nodeChildren:"childList",
    dirSelectable:false
  };
};
})();

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讓我們忽略default.js吧，畢竟裡面只有個"Hello Wrold"。

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