January 2013
Intermediate to advanced
332 pages
5h 23m
Chinese
Content preview from JAVASCRIPT網頁應用程式設計
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Spine 函式庫
|
189
全域事件
Spine 能讓你繫結、觸發位於全域作用域的事件。這可說是一種 PubSub 模式的應用。這
個機制能讓彼此互不相識的控制器們，有機會互相溝通，藉此有效降低控制器之間的耦
合。如果想要實作出這樣的機制，做法很簡單：只要準備一組全域物件
Spine.App
，並
透過它來繫結、觸發所有的事件即可：
var Sidebar = Spine.Controller.create({
proxied: ["change"],
init: function(){
this.App.bind("change", this.change);
},
change: function(name){ /* ... */ }
});
如果想少打一點字，可以在控制器裡使用
Spine.App
的別名
this.App
。像前面這段程式
碼，就會把控制器（
Sidebar
）和全域事件（
change
）綁在一起。其他的控制器或 script
程式可以隨時觸發這組事件，並傳入一些額外的資訊：
Spine.App.trigger("change", "messages");
產製模式（Render Pattern）
在介紹完控制器裡的一些主要功能之後，接下來可以看一些較典型的使用案例。
如果想要將模型和檢視器綁在一起，有一種非常方便的做法，稱之為
產製模式
（
Render
Pattern
）。這種做法是在建立完控制器的物件實體之後，在控制器裡幫其所對應的模型，
設定事件監聽器。此後每當模型裡的資料有任何更動，都會觸發一組回叫函式，由 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.