无法绑定angularjs中的范围变量

时间:2016-07-08 10:37:28

标签: javascript angularjs dependency-injection angularjs-scope

我有这些文件:

的index.html:

<!DOCTYPE html>
<html>
<head>
    <title>Gestore Anagrafica</title>
</head>
<body>
    <div>
        <h3>Insert new person</h3>
        <div ng-app="Person" ng-controller="PersonController">
            First Name: <input type="text" ng-model="firstName"><br>
            Last Name: <input type="text" ng-model="lastName"><br>
            Age: <input type="number" ng-model="age"><br>
            <br>
            Full Name: {{fullName()}} <br>
            Is major: {{isMajor()}} <br>
            <button ng-click="add()">Add Person</button>
        </div>
    </div>
    <script type="text/javascript" src="js/angular.js"></script>
    <script type="text/javascript" src="js/RegistryService.js"></script>
    <script type="text/javascript" src="js/PersonController.js"></script>
</body>
</html>

JS / RegistryService.js:

angular.module('RegistryService', []).

service('registry', function()
{
    this.people = [];

    this.add = function(person)
    {
        people.push(person);
    }
});

JS / PersonController.js:

var app = angular.module('Person', ['RegistryService']);
app.controller('PersonController',['registry', function($scope, registry) {
    $scope.firstName = "testName";
    $scope.lastName = "";
    $scope.age = 20;

    $scope.isMajor = function()
    {
        return $scope.age > 18;
    };

    $scope.add = function()
    {
        registry.add({  'firstName': $scope.firstName,
                        'lastName': $scope.lastName,
                        'age': $scope.age});

    };

    $scope.fullName = function() 
    {
        return $scope.firstName + " " + $scope.lastName;
    };
}]);

绑定不会发生:当我更改名称或年龄没有任何反应时,此外在开头输入都是空白但我希望在firstName中看到20和testName中的testName。浏览器的控制台显示没有错误。我错过了什么吗?

约束:服务'RegistryService'必须在另一个文件中。

问题: 用这两行

var app = angular.module('Person', ['RegistryService']);
app.controller('PersonController',['registry', function($scope, registry) {

我告诉名为Person的模块需要一些名为RegistryService的工作,控制器PersonController将使用位于RegistryService中的“注册表”事物(因此,如果我在这里放置一些未定义到RegistryService中的内容是错误的)。 function($ scope,registry)是控制器的构造函数,它使用全局变量$ scope和从'RegistryService'获取的变量注册表。我对依赖注入的整体理解是否良好?

2 个答案:

答案 0 :(得分:2)

您也需要描述$scope注入,因为您希望它在控制器函数中可用作第一个参数:

var app = angular.module('Person', ['RegistryService']);
app.controller('PersonController', ['$scope', 'registry', function($scope, registry) { }]);

答案 1 :(得分:1)

你没有正确地注入$ scope

app.controller('PersonController',['$scope', 'registry', function($scope, registry) {