Developing Hybrid Applications for the iPhone: Using HTML, by Lee Barney

By Lee Barney

“For these now not able to take on the complexities of Objective-C, it is a wonderful means to start construction iPhone apps. for those who be aware of the fundamentals of HTML, JavaScript, and CSS, you’ll be construction apps in no time.” —August Trometer, proprietor of FoggyNoggin software program,   observe the simpler, quicker approach to construct top quality iPhone purposes   Now, you don’t have to dive headfirst into Objective-C to write down cutting-edge purposes for the iPhone. you should use internet improvement instruments and applied sciences : JavaScript, HTML, and CSS. during this e-book, long-time net and cellular program developer Lee S. Barney exhibits you ways to exploit the QuickConnect and PhoneGap frameworks to create safe, top quality, modular hybrid iPhone purposes.   Lee S. Barney walks you thru the whole hybrid iPhone improvement strategy, from developing nice person interfaces to compiling, deploying, and executing purposes. alongside the best way, he introduces strategies and pattern code designed to streamline improvement, put off complexity, optimize functionality, and leverage all iPhone’s local capabilities—from its accelerometer and GPS to its integrated database. assurance comprises   utilizing Dashcode and Xcode jointly to create special, intriguing hybrid iPhone functions utilizing the QuickConnect JavaScript API to accomplish initiatives starting from vibrating the telephone to having access to the accelerometer and GPS position info gaining access to local iPhone performance utilizing the PhoneGap JavaScript API Storing, retrieving, and dealing with information at the iPhone, even with no community entry utilizing XMLHttpRequest to entry or synchronize distant information and use net prone growing Google-based maps in your personal app that paintings like these you notice within the iPhone’s Maps program   This booklet systematically lowers the obstacles to iPhone improvement, permitting internet builders to construct any iPhone software they could think with out lengthy improvement cycles or steep studying curves!

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Extra resources for Developing Hybrid Applications for the iPhone: Using HTML, CSS, and JavaScript to Build Dynamic Apps for the iPhone

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The answer is well-applied and highly engineered modularity. These somewhat secret modules are known as front controllers and application controllers. The examples in this chapter show you how to create and use these modules and how they can make your application creation easier and faster. Section 2: The QuickConnect JavaScript Framework—A Modularity Example The JavaScript framework in the Dashcode and Xcode templates is designed to minimize CPU and RAM usage and still be easy to use. Because this framework is designed to be highly modular, each component does one thing, does it well, and does it quickly.

Return to the SimpleExample Xcode project you created in Section 2. m file that the template generated for you. Don’t be concerned with what the code does. Look at it as an example of message passing. 1 - (void)applicationDidFinishLaunching:(UIApplication *)application { 2 // this helps in debugging, so that you know “exactly” where your views are placed; 3 // if you see “red”, you are looking at the bare window. view]; 12 13 [window makeKeyAndVisible]; 14 } Line 8 should look familiar. It doesn’t involve mammals, but uses alloc and init messages you saw previously.

Having seen implementations of the main application delegate method in both QuickConnectiPhone and PhoneGap, you are ready to see how the UIWebView is used to display and run a JavaScript application. All implementations of hybrid applications, including QuickConnectiPhone and PhoneGap, use this class. If you want to do any fancy font control in an application—that is, multiple fonts and/or sizes and colors—you must use UIWebView unless you go through the painful process of drawing the text yourself.

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