Appcelerator Titanium Up and Running 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 in control in this outstanding framework and exhibits you ways to generate cross-platform apps with a hundred% local controls. You’ll additionally study some great benefits of utilizing Titanium for those who 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 undertaking with Titanium Studio, after which takes you thru the stairs essential to construct complicated data-bound apps.

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First thing we need to do is to add some code for the function to be called, add the button, and then hook up the button to the function call. addEventListener('click',function(){ alert("click me") }); The first two lines should be easy to figure out, because they are yet another “create” method plus a familiar add. The other lines attach a function to the click event of the button we just added to win1. This is as basic as it gets. It’s adding an inline, anonymous function to the click event. Instead of “click,” you can specify any event that the button object fires.

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. Custom Events | 45 CHAPTER 5 Becoming a Capable Control Freak Controls are the way mobile users do things with their devices, such as pressing buttons, choosing items from option lists, and navigating among tabs. One of Titanium’s great advantages in comparison with some other environments that produce native apps is that Titanium uses native controls.

Custom events are just like a built-in event on the listener side. You set up a listener as you would for any other event. The difference is that you also need to fire the event yourself, whereas built-in events are fired automatically. The point of having a custom event is when you want to broadcast some information to listeners that may have subscribed to this event. It is a bit like calling a subroutine, except you don’t need to know anything about the routine being called, other than the parameters passed into the routine.

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