我是backbone.js的初学者。我开始用Addy Yosmani的“Backbone fundamentals”的例子创建一个小型待办事项应用程序。我有如下代码示例。我为每个项目使用了一个视图,并且我有一个列表视图,其中我呈现每个项目并将其附加到列表中,而不是附加它来替换整个项目。我尝试了一个调试器,并且元素在第一次循环运行后保持第一次待办事项,但在第二次运行时元素被替换而不是追加。我找不出解决方案。Backbone js append替换html而不是追加元素
代码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Hello World in Backbone.js</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" integrity="sha512-dTfge/zgoMYpP7QbHy4gWMEGsbsdZeCXz7irItjcC3sPUFtf0kuFbDz/ixG7ArTxmDjLXDmezHubeNikyKGVyQ==" crossorigin="anonymous">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/backbone-localstorage.js/1.0/backbone.localStorage-min.js" type="text/javascript"></script>
</head>
<body>
<div id="my-container">
</div>
<div class="container container-fluid" id="container" style="margin-top:5px;">
</div>
<script type="text/template" id="item-template">
<div class="post-panel" style="margin-top:5px;">
<div class="panel-default panel-heading post-title">
<%= title %>
</div>
<div class="panel-default panel-body post-content">
<%= content %>
</div>
</div>
</script>
<script>
var Todo = Backbone.Model.extend();
var TodoItemView = Backbone.View.extend({
todo_tpl: _.template($('#item-template').html()),
el: $('#container'),
render: function() {
this.$el.html(this.todo_tpl(this.model.attributes));
return this;
},
});
var TodoListView = Backbone.View.extend({
el: $('#my-container'),
render: function() {
posts = [
{'title': 'sample title 1' , 'content': 'sample content 1'},
{'title': 'sample title 2' , 'content': 'sample content 2'},
{'title': 'sample title 3' , 'content': 'sample content 3'},
{'title': 'sample title 4' , 'content': 'sample content 4'},
];
for (i=0; i < posts.length; i++) {
var todo1 = new Todo(posts[i]);
var todo1_view = new TodoItemView({model: todo1});
this.$el.append(todo1_view.render().el);
}
return this;
},
});
var todo1 = new Todo({"title" : "sample title" , "content" : "sample content"});
var todo1_view = new TodoItemView({model: todo1});
var todo_list_view = new TodoListView();
todo_list_view.render()
// todo1_view.render();
</script>
</body>
</html>
所有ItemView控件都指向同一个元素'$( '#集装箱')'的。所以你的代码会覆盖'$('#container')'中的内容,并将它附加到'$('#my-container')'。 – fuyushimoya
@fuyushimoya谢谢。我只是评论它,我得到渲染的元素。我怎样才能创建四个容器类的元素? – xtreak
@fuyushimoya既然你说它附加了新创建的内容以及div'my-container',为什么它会被替换? – xtreak