Question

/app.js    
var Welcome = Ember.Application.create({});

Welcome.person = Ember.View.extend({
    personName: 'Andrew'
});

以下是index.html的内容，视图的一部分：

/index.html
<!doctype html>
<!--[if lt IE 7 ]> <html lang="en" class="ie6"> <![endif]--> <!--[if IE 7 ]>    <html lang="en" class="ie7"> <![endif]--> <!--[if IE 8 ]>    <html lang="en" class="ie8"> <![endif]--> <!--[if IE 9 ]>    <html lang="en" class="ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en"> <!--<![endif]-->
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <title></title>
  <meta name="description" content="">
  <meta name="author" content="">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<script type="text/x-handlebars">
  {{personName}}
</script>

<script src="js/libs/handlebars-1.0.0.beta.6.js"></script>
<script src="js/libs/ember-1.0.pre.min.js"></script>
<script src="js/app.js"></script>
</body>
</html>

我的问题是为什么不显示任何内容？它不应该呈现personName的内容吗？

更新：

我正在使用Ember的入门套件。它已经定义了一个视图。我刚刚向对象添加了一个属性，但它仍然对视图不可见。

App.MyView = Em.View.extend({
  mouseDown: function() {
    window.alert("hello world!");
  },
  name: 'Andrew'
});

.html中的视图部分是：

<script type="text/x-handlebars">
    {{#view App.MyView}}
      <h1>Hello world {{name}}!</h1>
    {{/view}}
  </script>

由于事件有效，是不是应该可以访问的名称？

Answer 1

从1.0开始，视图保留了它们的上下文。

VIEW CONTEXT CHANGES

In apps built on earlier version of Ember (before 1.0), the {{#view}} helper
created a new context for the view. This meant that you had to explicitly set the
context on them.

In 1.0, we've  made this a bit simpler. The {{#view}} helper no longer changes
the context, instead  maintaining the parent context by default. Alternatively,
we will use the controller  property if provided. You may also choose to directly
overridethe context property. The order is as follows:

Specified controller
Supplied context (usually by Handlebars)
parentView's context (for a child of a ContainerView)
In the event that you do need to directly refer to a property on the view, you
can use the view keyword, i.e. {{view.myProp}}.


So, for your example, tou have to use {{view.name}}

<script type="text/x-handlebars">
  {{#view App.MyView}}
    <h1>Hello world {{view.name}}!</h1>
  {{/view}}
</script>

Ember.js：把手什么都没有显示

1 个答案: