更新值传递到骨干视图 [英] Update values passed to Backbone view

问题描述

在addone I M打造的观点一样，新的对象

In addone i m creating new object of view like that

this.section = "aaa";
var sectionview = new AA(model:this.model,section:this.section);

部分是I M传递到AA view.But传递部分的价值得到在结束更改添加一个像这样接连鉴于全局变量

section is global variable of another view that i m passing to AA view.But after passing section its value get change at end of add one like this

this.section = "aaa";
var sectionview = new AA(model:this.model,section:this.section);
.
.
.
.
.
.
this.section = "sss";

然后我怎么可以更新部分，我在创建视图AA的时间过去了价值？
预期的答案是

then how i can update value of section that i passed at time of creation of view AA??? Expected answer is

this.options.section = "sss" not "aaa"

在AA视图

推荐答案

通常的方法来这样的事情是延长 Backbone.Events 建立一个全球性的pub / sub事件调度：

The usual approach to this sort of thing is to extend Backbone.Events to build a global pub/sub event dispatcher:

window.pub_sub = _({}).extend(Backbone.Events);

然后您的视图可以侦听来自事件的 pub_sub ：

initialize: function() {
    this.listenTo(pub_sub, 'change:section', this.section_changed);
    //...
},
section_changed: function(section) {
    this.section = section;
    // And whatever else needs to happen...
}

然后，当你更改的部分触发事件：

Then trigger the event when you change the section:

pub_sub.trigger('change:section', new_section_value);

您会希望通过一个函数调用的地方漏斗所有更改全局部分，以确保事件被触发，但你应该这样做无论如何之类的事情。

You'd want to funnel all changes to the global section through a single function call somewhere to ensure that the events are triggered but you should be doing that sort of thing anyway.

演示： http://jsfiddle.net/ambiguous/rPtfS/

如果您需要这些设置，坚持再改 pub_sub 来一个全局设置模型，并用通常的模型持久性机制。

If you need these settings to persist then change pub_sub to a global settings model and use the usual model persistence mechanisms.

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