我正在将这个http://localtodos.com/ todo示例转换为通讯录，但结果却比我想象的更难。我将数据保存到localstorage但我似乎无法显示模板。实际上它似乎根本不想触及AddressBookView。当我在浏览器中点击索引并添加新联系人以保存它时，不会显示新的联系人或以前保存的联系人。代码如下。谢谢你的帮助。
$(function(){
var AddressBook = Backbone.Model.extend({
defaults: function() {
return {
name: "No contact name provided",
email: "No email address provided"
};
},
});
// Todo Collection
// ---------------
var AddressBookList = Backbone.Collection.extend({
model: AddressBook,
// Save all of the todo items under the `"todos-backbone"` namespace.
// localStorage: new Backbone.LocalStorage("todos-backbone"),
localStorage: new Backbone.LocalStorage("address-book"),
// We keep the Todos in sequential order, despite being saved by unordered
// GUID in the database. This generates the next order number for new items.
nextOrder: function() {
if (!this.length) return 1;
return this.last().get('order') + 1;
},
// Todos are sorted by their original insertion order.
comparator: 'order'
});
// Create our global collection of **Todos**.
var AddressBookEntries = new AddressBookList;
// Todo Item View
// --------------
// The DOM element for a todo item...
var AddressBookView = Backbone.View.extend({
tagName: "li",
// Cache the template function for a single item.
template: _.template($('#item-template').html()),
// The DOM events specific to an item.
events: {
"click .toggle" : "toggleDone",
"dblclick .view" : "edit",
"click a.destroy" : "clear",
"keypress .edit" : "updateOnEnter",
"blur .edit" : "close"
},
// The TodoView listens for changes to its model, re-rendering. Since there's
// a one-to-one correspondence between a **Todo** and a **TodoView** in this
// app, we set a direct reference on the model for convenience.
initialize: function() {
alert("TESST");
this.listenTo(this.model, 'change', this.render);
this.listenTo(this.model, 'destroy', this.remove);
},
// Re-render the titles of the todo item.
render: function() {
console.log("TEST")
this.$el.html(this.template(this.model.toJSON()));
this.input = this.$('.edit');
return this;
},
// Toggle the `"done"` state of the model.
toggleDone: function() {
this.model.toggle();
},
// Switch this view into `"editing"` mode, displaying the input field.
edit: function() {
this.$el.addClass("editing");
this.input.focus();
},
// Close the `"editing"` mode, saving changes to the todo.
close: function() {
var value = this.input.val();
if (!value) {
this.clear();
} else {
this.model.save({email: value});
this.model.save({name: value});
this.$el.removeClass("editing");
}
},
// If you hit `enter`, we're through editing the item.
updateOnEnter: function(e) {
if (e.keyCode == 13) this.close();
},
// Remove the item, destroy the model.
clear: function() {
this.model.destroy();
}
});
// The Application
// ---------------
// Our overall **AppView** is the top-level piece of UI.
var AppView = Backbone.View.extend({
// Instead of generating a new element, bind to the existing skeleton of
// the App already present in the HTML.
el: $("#address-book"),
// Our template for the line of statistics at the bottom of the app.
//statsTemplate: _.template($('#stats-template').html()),
// Delegated events for creating new items, and clearing completed ones.
events: {
"click #save-entry": "createAddressBookEntry",
"click #clear-completed": "clearCompleted",
"click #toggle-all": "toggleAllComplete"
},
// At initialization we bind to the relevant events on the `Todos`
// collection, when items are added or changed. Kick things off by
// loading any preexisting todos that might be saved in *localStorage*.
initialize: function() {
this.input = this.$("#save-entry");
// this.allCheckbox = this.$("#toggle-all")[0];
this.listenTo(AddressBookEntries, 'add', $("#name").addOne);
this.listenTo(AddressBookEntries, 'reset', this.addAll);
this.listenTo(AddressBookEntries, 'all', this.render);
this.footer = this.$('footer');
this.main = $('#main');
AddressBookEntries.fetch();
},
// Re-rendering the App just means refreshing the statistics -- the rest
// of the app doesn't change.
render: function() {
// var done = AddressBookEntries.done().length;
// var remaining = AddressBookEntries.remaining().length;
if (AddressBookEntries.length) {
this.main.show();
this.footer.show();
// this.footer.html(this.statsTemplate({done: done, remaining: remaining}));
} else {
this.main.hide();
this.footer.hide();
}
// this.allCheckbox.checked = !remaining;
},
// Add a single todo item to the list by creating a view for it, and
// appending its element to the `<ul>`.
addOne: function(entry) {
console.log("Second This" + this);
var view = new AddressBookView({model: entry});
this.$("#contact-list").append(view.render().el);
},
// Add all items in the **Todos** collection at once.
addAll: function() {
AddressBookEntries.each(this.addOne, this);
},
// If you hit return in the main input field, create new **Todo** model,
// persisting it to *localStorage*.
createAddressBookEntry: function(e) {
AddressBookEntries.create({name: $("#name").val()});
AddressBookEntries.create({email: $("#email").val()});
$("#email").val('');
$("#name").val('');
},
});
// Finally, we kick things off by creating the **App**.
var App = new AppView;
});
的index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Backbone.js Todos</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" media="screen" title="no title" charset="utf-8">
<link rel="stylesheet" href="css/narrowJumbotron.css" type="text/css" media="screen" title="no title" charset="utf-8">
<link rel="stylesheet" href="css/app.css" type="text/css" media="screen" title="no title" charset="utf-8">
</head>
<body>
<div class="container">
<div class="header">
<ul class="nav nav-pills pull-right">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</ul>
<h3 class="text-muted">Address Book</h3>
</div>
<div class="jumbotron">
<h1>Jumbotron heading</h1>
<p class="lead"></p>
<p><a class="btn btn-lg btn-success" href="#">Sign up today</a></p>
</div>
<div class="row marketing">
<div class="col-lg-6">
<div id="address-book">
<header>
<input id="name" type="text" placeholder="Name">
<input id="email" type="text" placeholder="Email">
<a id="save-entry" class="btn btn-lg btn-success" href="#">Save</a>
</header>
<section id="main">
<ul id="contact-list"></ul>
</section>
</div>
</div>
</div>
</div>
<script src="js/jquery-1.10.1.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/underscore.js" type="text/javascript" charset="utf-8"></script>
<script src="js/backbone.js" type="text/javascript" charset="utf-8"></script>
<script src="js/backbone.localStorage-min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/app.js" type="text/javascript" charset="utf-8"></script>
<!-- Templates -->
<script type="text/template" id="item-template">
<div class="view">
// <input class="toggle" type="checkbox" <%= done ? 'checked="checked"' : '' %> />
<label><%- name %></label>
<a class="destroy"></a>
</div>
<input class="edit" type="text" value="<%- name %>" />
</script>
</body>
</html>
答案 0 :(得分：2)
你说
this.listenTo(AddressBookEntries, 'add', $("#name").addOne);
我认为你的意思是
this.listenTo(AddressBookEntries, 'add', this.addOne);
您还希望保存此类型号
this.model.save({email: value, name: value});
否则会添加不必要的渲染，并会两次触发change事件。