三种AngularJS中获取数据源的方式_AngularJS-JS Tutorial-php.cn

三种AngularJS中获取数据源的方式_AngularJS

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Release： 2016-05-16 15:16:40

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在AngularJS中，可以从$rootScope中获取数据源，也可以把获取数据的逻辑封装在service中，然后注入到app.run函数中，或者注入到controller中。本篇就来整理获取数据的几种方式。

■ 数据源放在$rootScope中

var app = angular.module("app",[]);

app.run(function($rootScope){
  $rootScope.todos = [
    {item:"",done:true},
    {item:"",done:false}
  ];
})


<div ng-repeat="todo in todos">
  {{todo.item}}
</div>

<form>
  <input type="text" ng-model="newTodo" />
  <input type="submit" ng-click=""todos.push({item:newTodo, done:false}) />
</form>

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以上，把数据源放在$rootScope中的某个字段中，很容易被重写。

■ 数据源放在service中,把servie注入到run函数中

app.service("TodoService", function(){
  this.todos = [
    {item:"",done:true},
    {item:"",done:false}
  ];
   
})

app.run(function($rootScope, TodoService){
  $rootScope.TodoService = TodoService;
}) 

<div ng-repeat="todo in TodoService.todos">
  {{todo.item}}
</div>

<form>
  <input type="text" ng-model="newTodo" />
  <input type="submit" ng-click=""TodoService.todos.push({item:newTodo, done:false}) />
</form>

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在html中似乎这样写比较好：

<input type="submit" ng-click=""TodoService.todos.addodo(newTodo) />

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在service中增加一个方法：

app.service("TodoService", function(){
  this.todos = [
    {item:"",done:true},
    {item:"",done:false}
  ];
  
  this.addTodo = fucntion(newTodo){
    this.todos.push({item:newTodo, done:false})
  }
   
})

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■ 数据源放在service中,把servie注入到controller中

app.controller("TodoCtrl", function($scope, TodoService){
  this.TodoService = TodoServce;
})

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在对应的html中：

<body ng-app="app" ng-controller="TodoCtrl as todoCtrl">
  <div ng-repeat="todo in todoCtrl.TodoService.todos">
    {{todo.item}}
  </div>
</body>

<form>
  <input type="text" ng-model="newTodo" />
  <input type="submit" ng-click="todoCtrl.TodoService.addTodo(newTodo)"/>
</form>

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■ 数据源放在service中,把servie注入到controller中，与服务端交互

在实际项目中，service还需要和服务端交互。

var app = angular.module("app",[]);

app.service("TodoService", function($q, $timeout){
  this.getTodos = function(){
    var d = $q.defer();
    
    //模拟一个请求
    $timeout(function(){
      d.resolve([
        {item:"", done:false},
        ...
      ])
    },3000);
    
    return d.promise;
  }
  
  this.addTodo = function(item){
    this.todos.push({item:item, done:false});
  }
})

app.controller("TodoCtrl", function(TodoService){
  var todoCtrl = this;
  
  TodoService.getTodos().then(function(result){
    todoCtrl.todos = result;
  })
  
  todoCtrl.addTodo = TodoService.addTodo;
})

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以上就是AngularJS中获取数据源的方法，希望对大家的学习有所帮助。