我正在使用 AngularJS 构建一个简单的任务管理系统，目前正在使用它并模拟数据。我在将服务注入(inject) ProjectCtrl Controller 时遇到问题，但无法理解它。
在此代码的底部:为什么 ProjectsCtrl Controller 中的项目变量只是一个空数组？它应该包含模型数据，不是吗？我做错了什么？
请原谅这个可能非常愚蠢的问题。我只是没有发现我的错误。
angular.module("TaskManager", ['ui.router'])
.config([
'$stateProvider',
'$urlRouterProvider',
function($stateProvider, $urlRouterProvider){
$stateProvider
.state('home', {
url: '/home',
templateUrl: '/home.html',
controller: 'MainCtrl'
})
.state('projects', {
url: '/projects/{id}',
templateUrl: '/projects.html',
controller: 'ProjectsCtrl'
});
$urlRouterProvider.otherwise('home');
}
])
.factory('projects', [function(){
var o = {
projects: []
};
return o;
}])
.controller('MainCtrl', [
'$scope',
'projects',
function($scope, projects){
$scope.projects = projects.projects;
$scope.projects = [
{title: "project 1", done: 0},
{title: "Another project 2", done: 0},
{title: "project 3", done: 1},
{title: "project 4", done: 0},
{title: "project 5", done: 0},
];
$scope.addproject = function() {
if(!$scope.title || $scope.title === '') { return };
$scope.projects.push({
title: $scope.title,
comment: $scope.comment,
done: 0,
tasks: [
{title: 'Task 1', comment: 'Kommentar 1', done: 0},
{title: 'Task 2', comment: 'Kommentar 2', done: 0}
]
});
$scope.title = "";
$scope.comment = "";
}
$scope.markAsDone = function(project) {
project.done = 1;
}
}
])
.controller('ProjectsCtrl', [
'$scope',
'$stateParams',
'projects',
function($scope, $stateParams, projects){
$scope.project = projects.projects[$stateParams.id];
// Why is this an empty array?
console.log(projects);
}
])
为了完成:这是 HTML 部分:
<html>
<head>
<title>TaskManager</title>
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet">
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.10/angular-ui-router.js"></script>
<script src="app.js"></script>
</head>
<body ng-app="TaskManager">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<ui-view></ui-view>
</div>
</div>
<script type="text/ng-template" id="/home.html">
<div class="page-header">
<h1>TaskManager</h1>
<a href="#/test">TEST</a>
</div>
<div ng-repeat="project in projects | orderBy: ['done','title']">
<span ng-click="markAsDone(project)">Done</span>
{{project.title}} - done: {{project.done}}
<span>
<a href="#/projects/{{$index}}">Tasks</a>
</span>
<p ng-show="project.comment">Comment: {{project.comment}}</p>
</div>
</hr>
<form ng-submit="addproject()" style="margin-top: 30px;">
<h3>Add new project</h3>
<input type="text" ng-model="title" placeholder="project"></input>
<br><br>
<textarea name="comment" ng-model="comment"></textarea>
<br>
<button type="submit" class="btn">Post</button>
</form>
</script>
<script type="text/ng-template" id="/projects.html">
<div class="page-header">
<h3>Project: {{project.title}}</h3>
</div>
<div ng-repeat="task in project.tasks | orderBy: ['done','title']">
{{task.title}} - done: {{task.done}}
<p ng-show="task.comment">Comment: {{task.comment}}</p>
</div>
</script>
</body>
</html>
最佳答案
您永远不会将值分配给projects.projects。在 MainCtrl 中，将 $scope.projects 分配给 projects.projects 的值(此时它是一个空数组)。然后，您可以使用全新且不同的数组覆盖 $scope.projects，因此您永远不会最终修改 projects.projects。
我会将允许您添加、删除、更新项目的功能移至 projects 服务，但在此期间，您可以先分配 projects.projects，然后再将其分配给$scope.projects。
更好的项目服务:
.factory('projects', function() {
var projects = [];
return {
add: function(item) {
// your additional code
projects.push(item);
},
remove: function(item) {
// your additional code
var i = projects.indexOf(item);
if (i >=0) projects.splice(i,1);
},
get: function() {
return projects;
},
initialize: function(items) {
projects = items;
}
};
});
然后您可以在 Controller 中使用它:
.controller('MainCtrl', function($scope, projects) {
projects.initialize([ ... ]);
$scope.projects = projects.get();
$scope.addproject = function() {
// NOTE: move whatever code you feel is or could be the responsibility of the service to the add method. I left this function as-is though, so you have a frame of reference.
if(!$scope.title || $scope.title === '') { return };
projects.add({
title: $scope.title,
comment: $scope.comment,
done: 0,
tasks: [
{title: 'Task 1', comment: 'Kommentar 1', done: 0},
{title: 'Task 2', comment: 'Kommentar 2', done: 0}
]
});
$scope.title = "";
$scope.comment = "";
};
// etc.
});
我建议将服务设置为单点权限，以便您可以测试与服务及其数据交互相关的逻辑，并避免在不同的 Controller 和指令需要与服务或其数据交互时重复自己。它还将帮助您避免不同 Controller 、指令等之间数据不同步的此类问题。
关于javascript - AngularJS:注入(inject)我的 Controller 有什么问题？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29000634/