將價值從控制器傳遞到工廠以在對象之間進行選擇

Question

我有一個內置於AngularJS中的測驗應用程序，我想在兩個對象之間進行選擇，具體取決於您在視圖中選擇哪個測驗。在視圖中選擇測驗時，將執行一個功能。在這個過程中，我向包含對象的dataservice.js文件發送一個變量，在這裏我有一個if語句，根據來自控制器的輸入選擇正確的對象。 如何在changeState函數外使用測驗變量？我想用它來選擇兩個測驗對象。

//控制器

function activateQuiz(){ 

     quizMetrics.changeState("quiz", true); 
     DataService.startQuiz("quiz_1"); 
     //test("hund"); 

    } 

    function activateQuiz_2(){ 

     quizMetrics.changeState("quiz", true); 
     DataService.startQuiz("quiz_2"); 
     //test("kat"); 

    } 

//廠

（函數（）{

/* 
* Declaring a factory service as part of the existing turtleFacts Module. 
*/ 
angular 
    .module("turtleFacts") 
    .factory("DataService", DataService); 
/* 
* Actual definition of the function used for this factory 
*/ 
function DataService(){ 
    /* 
    * dataObj is used to simulate getting the data from a backend server 
    * The object will hold data which will then be returned to the other 
    * factory declared in js/factory/quiz.js which has this factory 
    * as a dependency 
    */ 

    var dataObj = { 
     startQuiz: startQuiz, 
     quizQuestions: quizQuestions, 
     correctAnswers: correctAnswers 
    }; 

    var dataObj_2 = { 
     startQuiz: startQuiz, 
     quizQuestions: quizQuestions_2, 
     correctAnswers: correctAnswers_2 
    }; 


      var quiz; 
      function startQuiz(metric, state){ 
      if(metric === "quiz_1"){ 
       quiz = "quiz1" 
      }else if(metric === "quiz_2"){ 
       quiz = "quiz2" 
      }else{ 
       return false; 
      } 
      console.log(quiz) 

     } 

      if (quiz = "quiz1") { // here i want to use the the quiz variable from the changeState function. 
      return dataObj; 
       } else if (quiz = "quiz2") { 
      return dataObj_2; 
      } 

} 

Answer 1

你可能有這樣的事情：

/* 
* Declaring a factory service as part of the existing turtleFacts Module. 
*/ 
angular 
    .module("turtleFacts") 
    .factory("DataService", DataService); 
/* 
* Actual definition of the function used for this factory 
*/ 
function DataService(){ 
    /* 
    * dataObj is used to simulate getting the data from a backend server 
    * The object will hold data which will then be returned to the other 
    * factory declared in js/factory/quiz.js which has this factory 
    * as a dependency 
    */ 

    var dataObj = { 
     changeState: changeState, 
     quizQuestions: quizQuestions, 
     correctAnswers: correctAnswers 
    }; 

    var dataObj_2 = { 
     changeState: changeState, 
     quizQuestions: quizQuestions_2, 
     correctAnswers: correctAnswers_2 
    }; 

    var quiz; 

    function changeState(metric, state){ 
     if(metric === "quiz_1"){ 
      quiz = "quiz1" 
     }else if(metric === "quiz_2"){ 
      quiz = "quiz2" 
     }else{ 
      return false; 
     } 
     console.log(quiz); 

     if (quiz == "quiz1") { // here i want to use the the quiz variable from the changeState function. 
      return dataObj; 
     } else if (quiz == "quiz2") { 
      return dataObj_2; 
     } 
    } 
} 

從你控制器，你可以得到數據a s：

$scope.quiz = DataService. changeState(metric, state);