在AngularJS中，可以從$rootScope中擷取資料來源，也可以把擷取資料的邏輯封裝在service中，然後注入到app.run函數中，或者注入到controller中。本篇就來整理擷取資料的幾種方式。
■ 資料來源放在$rootScope中
var app = angular.module("app",[]);app.run(function($rootScope){ $rootScope.todos = [ {item:"",done:true}, {item:"",done:false} ];})<div ng-repeat="todo in todos"> {{todo.item}}</div><form> <input type="text" ng-model="newTodo" /> <input type="submit" ng-click=""todos.push({item:newTodo, done:false}) /></form>
以上，把資料來源放在$rootScope中的某個欄位中，很容易被重寫。
■ 資料來源放在service中,把servie注入到run函數中
app.service("TodoService", function(){ this.todos = [ {item:"",done:true}, {item:"",done:false} ]; })app.run(function($rootScope, TodoService){ $rootScope.TodoService = TodoService;}) <div ng-repeat="todo in TodoService.todos"> {{todo.item}}</div><form> <input type="text" ng-model="newTodo" /> <input type="submit" ng-click=""TodoService.todos.push({item:newTodo, done:false}) /></form>
在html中似乎這樣寫比較好：
<input type="submit" ng-click=""TodoService.todos.addodo(newTodo) />
在service中增加一個方法：
app.service("TodoService", function(){ this.todos = [ {item:"",done:true}, {item:"",done:false} ]; this.addTodo = fucntion(newTodo){ this.todos.push({item:newTodo, done:false}) } })
■ 資料來源放在service中,把servie注入到controller中
app.controller("TodoCtrl", function($scope, TodoService){ this.TodoService = TodoServce;})
在對應的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>
■ 資料來源放在service中,把servie注入到controller中，與服務端互動
在實際項目中，service還需要和服務端互動。
var app = angular.module("app",[]);app.service("TodoService", function($q, $timeout){ this.getTodos = function(){ var d = $q.defer(); //類比一個請求 $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;})
以上就是AngularJS中擷取資料來源的方法，希望對大家的學習有所協助。
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