详解基于angular路由的requireJs按需加载js

最近终于不忙了！！有时间沉淀一下之前学到的angular东东！！

angular路由想必大家已经不陌生了！（陌生的去看我之前那篇手把手教你配置angular路由！）

angular路由作为单页面应用，切换页面的时候都是一个页面，所以切换controller和按需加载控件js就成了大问题！！折腾了我半天啊，angular-route内置的办法也没有解决这个问题，最终我是用requireJs解决的这个问题！！上代码！

1.首先引入requireJs，并且在它的下面用闭包写配置 requirejs(['framework'])，这句话的意思是首次进入页面，加载framework

<script src="js/lib/require.min.js"></script>
<script>
  (function () {
    var jsDir = '/js/';
    var jsLibDir = '/js/lib/';
    var jsComponentDir = '/components/';
    var paths = {
      angular: jsLibDir + 'angular.min',
      angularRoute: jsLibDir + 'angular-route.min',
      jquery: jsLibDir + 'jquery.min',
      jQueryMD5: jsLibDir + 'jquery.md5',
      highcharts: jsLibDir + 'highcharts',
      radialProgress: jsLibDir + 'radialProgress',
      d3: jsLibDir + 'd3.min',
      echarts: jsLibDir + 'echarts',
      framework: jsDir + 'framework',
      angularUtil: jsDir + 'angular-util',
      standardDashboard: jsDir + 'standard-dashboard',
      standardConsole: jsDir + 'standard-console',
      standardAmountStatistic: jsDir + 'standard-amount-statistic',
      standardReport: jsDir + 'standard-report',
      standardAdvancedReport: jsDir + 'standard-advanced-report',
      standardExpertAnswer: jsDir + 'standard-expert-answer',
      standardService: jsDir + 'standard-service',
      standardStrategyInform: jsDir + 'standard-strategy-inform',
      standardMember: jsDir + 'standard-member',
      standardSchedule: jsDir + 'standard-schedule',
      standardChannel: jsDir + 'standard-channel',
      standardStrategyMerge: jsDir + 'standard-strategy-merge',
      standardIntegrate: jsDir + 'standard-integrate',
      standardPersonalCenter: jsDir + 'standard-personal-center',
      dateTimePicker: jsComponentDir + 'dateTimePicker/date-time-picker',
      fullCalendar: jsComponentDir + 'fullCalendar/fullcalendar',
      moment: jsComponentDir + 'fullCalendar/moment'
    }; 

    requirejs.config({
      paths: paths,
      shim: {
        angular: {
          exports : 'angular',
          deps: ['jquery']
        },
        angularRoute: {
          deps: ['angular']
        },
        jQueryMD5: {
          deps: ['jquery']
        }
      },
      //urlArgs: "timeStamp=" + (new Date()).getTime()
      //urlArgs: 'v=1.47.1&t=20160719'
    });
    requirejs(['framework']);
  }());
</script>

2.framework.js作为首次加载的js，起到至关重要的作用哈！！定义frameworkApp模块作为主模块，另外加载公共服务utilmodel和ngRoute路由，定义一个resolveController方法，回调函数是requireJs，一会儿会讲到！

//引入模块
var frameworkApp = angular.module('FrameworkApp',['ngRoute', 'utilModule']);
//加载对应的controller
var resolveController = function (names, dependancies) {
  //console.log(names)
  //console.log(dependancies)
  return {
    loadController: ['$q', '$rootScope', function ($q, $rootScope) {
      var defer = $q.defer();
      require(names, function () {
        defer.resolve();
        $rootScope.$apply();
      });
      return defer.promise;
    }]
  };
};

3.配置路由，用resolve方法完成回调，注意回调的是一个list，值是步骤一中定义的模块名称

frameworkApp.config(['$routeProvider', '$controllerProvider', '$provide', '$compileProvider', '$filterProvider',
  function ($routeProvider, $controllerProvider, $provide, $compileProvider, $filterProvider) {
    frameworkApp.register = {
      controller: $controllerProvider.register,
      factory: $provide.factory,
      service: $provide.service,
      filter: $filterProvider.register,
      directive: $compileProvider.directive
    };
    $routeProvider
      .when('/',{
        redirectTo: '/dashboard'
      })
      .when('/dashboard',{
        templateUrl: 'dashboard.html',
        controller: 'DashboardCtrl',
        resolve: resolveController(['standardDashboard', 'd3','radialProgress','highcharts'])
      })
      .when('/console',{
        templateUrl: 'console.html',
        controller: 'ConsoleCtrl',
        resolve: resolveController(['standardConsole'])
      })
      .when('/amountStatistic',{
        templateUrl: 'amount-statistic.html',
        controller: 'amountStatisticCtrl',
        resolve: resolveController(['standardAmountStatistic','highcharts','dateTimePicker'])
      })
      .when('/report',{
        templateUrl: 'report.html',
        controller: 'ReportCtrl',
        resolve: resolveController(['standardReport','dateTimePicker'])
      })
      .when('/advancedReport',{
        templateUrl: 'advanced-report.html',
        controller: 'advancedReportCtrl',
        resolve: resolveController(['standardAdvancedReport','highcharts','dateTimePicker'])
      })
      .when('/expertAnswer',{
        templateUrl: 'expert-answer.html',
        controller: 'expertAnswerCtrl',
        resolve: resolveController(['standardExpertAnswer'])
      })
      .when('/service',{
        templateUrl: 'service.html',
        controller: 'ServiceCtrl',
        resolve: resolveController(['standardService'])
      })
      .when('/strategy-inform',{
        templateUrl: 'strategy-inform.html',
        controller: 'StrategyInformCtrl',
        resolve: resolveController(['standardStrategyInform'])
      })
      .when('/member',{
        templateUrl: 'member.html',
        controller: 'MemberCtrl',
        resolve: resolveController(['standardMember'])
      })
      .when('/schedule',{
        templateUrl: 'schedule.html',
        controller: 'ScheduleCtrl',
        resolve: resolveController(['standardSchedule'])
      })
      .when('/channel',{
        templateUrl: 'channel.html',
        controller: 'ChannelCtrl',
        resolve: resolveController(['standardChannel'])
      })
      .when('/strategy-merge',{
        templateUrl: 'strategy-merge.html',
        controller: 'StrategyMergeCtrl',
        resolve: resolveController(['standardStrategyMerge'])
      })
      .when('/integrate',{
        templateUrl: 'integrate.html',
        controller: 'IntegrateCtrl',
        resolve: resolveController(['standardIntegrate'])
      })
      .when('/personalCenter',{
        templateUrl: 'personal-center.html',
        controller: 'PersonalCenterCtrl',
        resolve: resolveController(['standardPersonalCenter'])
      })
      .otherwise({
        redirectTo: '/error'
      }); 

  }]);

4.大功告成啦~完成controller切换，和js按需加载！！！啦啦啦！

5.有一点我也没解决，在引入echarts的时候，用这种方法就报错了，换成highcharts就可以了，折腾半天啊也没把echarts引进来，不过到是发现，在require生效之前引入echarts的话，是可以的！求大神讲解啊！！

<!-- start build -->
  <script src="js/lib/echarts.js"></script>
  <script src="js/lib/require.min.js"></script> 

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