详解Angular中的自定义服务Service、Provider以及Factory

<!-- factory模式 -->
  <div ng-controller="theFactoryCtrl">
    <h3>Factory模式</h3>
    <ul>
      <li ng-repeat="i in names">
        {{i}}
      </li>
    </ul>

  </div>

/*工厂模式，注入参数中调用的是这个函数里的返回值*/
  app.factory("myFactory",function(){

    var args = arguments;
    var obj = {}

    obj.exec = function(){
      var arr = [];
      for(let i = 0; i<arguments.length; i++){
        arr.push(arguments[i]);
      }
      return arr;
    }
    return obj;
  })
app.controller("theFactoryCtrl",function ($scope,myFactory) {

    $scope.names = myFactory.exec("张三的歌","赵四的舞","老王贼六");

  })

<!-- service模式 -->
  <div ng-controller="theServiceCtrl">
    <h3>Service模式</h3>
    <p>prop:{{prop}}</p>
    <p>num:{{num}}</p>
  </div>

app.controller("theServiceCtrl",function($scope,myService){
    $scope.prop = myService.prop("呵呵");
    $scope.num = myService.num;
  })
/*Service是new出来的，所以可以直接调用里面的属性*/
  app.service("myService",function(){
    this.num = Math.floor(Math.random()*10);//0到10的随机数
    this.prop = function(arg){
      return arg;
    };
  })

<!-- provider模式 -->
  <div ng-controller="theProviderCtrl">
    <h3>Provider模式</h3>
    <p>姓名:{{info.name}}</p>
    <p>部队:{{info.squad}}</p>
    <p>职务:{{info.role}}</p>
  </div>

/*使用$get方法关联对应的config*/
  app.provider("myProvider",function(){

    this.$get = function(){

      return {
        name : "朱子明",
        squad : "八路军386旅独立团",
        role : this.roleSet

      }
    }

  })
  /*名字必须符合规范：xxxxxxProvider*/
  app.config(function(myProviderProvider){
    myProviderProvider.roleSet = "保卫干事"
  })
app.controller("theProviderCtrl",function($scope,myProvider){
    $scope.info = {
      name : myProvider.name,
      squad : myProvider.squad,
      role : myProvider.role

    }
  })