模板渲染后KnockoutJS绑定事件

I've been searching for a while, and I'm pretty confident this is a new question, and not a repeat like the title suggests. :)

我一直在寻找，我很有信心这是一个新问题，而不是像标题所暗示的重复。 :)

Basically, I'm trying to find out if there is a subscribe-able event that KnockoutJS creates after a template render when using something like jQuery templates.

基本上，我正在尝试找出KnockoutJS在使用jQuery模板之类的模板渲染后创建的可订阅事件。

I'd use the built-in "afterRender" but I found out that it doesn't fire if the observable array is cleared. I built this demo to illustrate that problem: http://jsfiddle.net/farina/YWfV8/1/.

我会使用内置的“afterRender”，但我发现如果清除了可观察数组，它就不会触发。我构建了这个演示来说明这个问题：http：//jsfiddle.net/farina/YWfV8/1/。

Also, I'm aware that I could write a custom handler...but that seems really unnecessary for what I need.

另外，我知道我可以写一个自定义处理程序......但这对我需要的东西来说似乎没必要。

I just want one event that fires after the template finishes rendering.

我只想在模板完成渲染后触发一个事件。

2 个解决方案

#1

My colleague actually solved this last night using something we were playing with before I went home.

我的同事昨晚在我回家之前使用我们正在玩的东西解决了这个问题。

So the whole "problem" with the events “afterRender”, “afterAdd”, and “beforeRemove” is that they act differently in conjunction with a "foreach" binding. KnockoutJS is nice enough to tell you this on their page, but for whatever reason it didn't actually sink in for me until I saw it in practice.

因此事件“afterRender”，“afterAdd”和“beforeRemove”的整个“问题”是它们与“foreach”绑定一起表现不同。 KnockoutJS非常好，可以在他们的页面上告诉你这个，但无论出于何种原因它直到我在实践中看到它才真正沉入其中。

What really works is to scrap the whole "foreach" binding and use Knockout's native "data" bind like this:

真正有效的是废弃整个“foreach”绑定并使用Knockout的本地“数据”绑定，如下所示：

data-bind="template: { name: 'item-template', data: items, afterRender: caller }"

Then "afterRender" works exactly as the name suggests.

然后“afterRender”完全按照顾名思义工作。

I was under the impression that you couldn't iterate the collection and render new UI without foreach, but these examples illustrate that it does work.

我的印象是你无法迭代集合并在没有foreach的情况下渲染新UI，但这些例子说明它确实有用。

http://jsfiddle.net/farina/kuFx2/1/ (Using object array style ViewModel)
http://jsfiddle.net/farina/kuFx2/1/（使用对象数组样式ViewModel）
http://jsfiddle.net/farina/QtZm2/1/ (Using function style ViewModel)
http://jsfiddle.net/farina/QtZm2/1/（使用函数样式ViewModel）

I made an example for both ViewModel styles because I sometimes need one or the other.

我为两个ViewModel样式做了一个例子，因为我有时需要一个或另一个。

Thanks for the help Dan!!

谢谢Dan的帮助!!

2 个解决方案

#1

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