Javascript Backbone 0.9.9：listenTo 和 on 之间的区别
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/14041042/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Backbone 0.9.9: Difference between listenTo and on
提问by bodokaiser
I am trying to learn the new changes they did in Backbone 0.9.9.
我正在尝试学习他们在 Backbone 0.9.9 中所做的新更改。
Currently I got problems to understand the difference between listenToand on:
目前，我有问题理解之间的区别listenTo和on：
listenTo
听
var View = Backbone.View.extend({
tagName: "div",
intialize: function() {
this.listenTo(this.model, 'change', this.render);
},
render: function() {
this.$el.empty();
this.$el.append('<p>hello world</p>');
}
});
on
在
var View = Backbone.View.extend({
tagName: "div",
intialize: function() {
this.model.on('change', this.render, this);
},
render: function() {
this.$el.empty();
this.$el.append('<p>hello world</p>');
}
});
I have heard that listenToallows with stopListeningto unsubscribe from all events when for example the view gets removed to avoid memory leaks.
我听说当例如视图被删除以避免内存泄漏时，listenTo允许stopListening取消订阅所有事件。
Is this the only reason?
这是唯一的原因吗？
采纳答案by Derick Bailey
listenToand stopListeningcame from the community, basically. They help to make it easier to bind and unbind events.
listenTo而stopListening来自社会，基本上是这样。它们有助于更轻松地绑定和解除绑定事件。
There's a lot of existing documentation and blog posts surrounding the idea, including stuff that I've written on the subject.
有很多现有的文档和博客文章围绕着这个想法，包括我写的关于这个主题的东西。
Johnny Oshika is the first person that I saw using this technique. It was originally posted as an answer to a StackOverflow question here: Backbone.js : repopulate or recreate the view?
Johnny Oshika 是我看到的第一个使用这种技术的人。它最初是作为对 StackOverflow 问题的回答发布的：Backbone.js : repopulate or recreate the view?
You can read what I've written about this, here:
你可以在这里阅读我写的关于这个的内容：
回答by Richard
When you create a view, both listenToand onadd event handling. However, when the view is destroyed, the listenTocall will automatically remove the event handler. This prevents memory leaksand zombie event listeners.
当你创建一个视图，都listenTo和on添加事件处理。但是，当视图被销毁时，listenTo调用将自动删除事件处理程序。这可以防止内存泄漏和僵尸事件侦听器。
So, use onif you want to manage the handler yourself. Just make sure to call off. Otherwise, call listenTo.
因此，on如果您想自己管理处理程序，请使用。只要确保调用off. 否则，调用listenTo。
