Appcelerator Titanium: Up and Running: Building Native iOS by John Anderson

By John Anderson

Construct local apps for iOS, Android, and Blackberry from a unmarried JavaScript codebase with Appcelerator Titanium. This advisor will get you speedy up to the mark in this remarkable framework and exhibits you the way to generate cross-platform apps with a hundred% local controls. you are going to additionally examine some great benefits of utilizing Titanium in the event you are looking to create an app for only one local platform, instead of fight with Java or Objective-C. fast paced and whole of examples, this booklet is helping you construct your first venture with Titanium Studio, after which takes you thru the stairs essential to construct advanced data-bound apps.

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Additional info for Appcelerator Titanium: Up and Running: Building Native iOS and Android Apps Using JavaScript

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WriteToFile that handles writing out the data to the file that we’re watching, and is also responsible for firing a custom event when it is called. We then add a listener on that event that can do whatever updates are necessary when the event fires. The data that comes into the event is: {"newdata":"someddata","type":"datachanged"} This is the "newdata" JSON property that we sent in on the datachanged event. Tita‐ nium also adds the "type" JSON property, which is simply the name of the custom event.

Tita‐ nium also adds the "type" JSON property, which is simply the name of the custom event. If you start using many custom events, this property will let you always know what event fired each notification. This can be handy if you have the same listener setup on multiple custom events. Custom events are a nice way to do intra-app communication. It’s an easy way to send information to anyone who has subscribed, or set up listeners to receive events without having to know ahead of time what those listeners are.

I made a form, dropped a button on it, and ran it. I clicked it, and nada; nothing happened at all. After thumbing around in the manual (no Internet back then) I found out that I needed to hook a function to the “click” event. I did that, and my event-driven program (no apps yet either) was coming to life. Events are at the core of Titanium, as they are in many event-driven languages and systems. When invoking an event listener, Titanium al‐ most always passes in an event object as a JSON document that gives you information about the event, what object fired it, etc.

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