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

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By Lee Barney

“For these no longer able to take on the complexities of Objective-C, it is a wonderful means to start development iPhone apps. for those who understand the fundamentals of HTML, JavaScript, and CSS, you’ll be development apps in no time.” —August Trometer, proprietor of FoggyNoggin software program,   notice the better, speedier approach to construct fine quality iPhone functions   Now, you don’t have to dive headfirst into Objective-C to put in writing state of the art purposes for the iPhone. you should use net improvement instruments and applied sciences you realize: JavaScript, HTML, and CSS. during this booklet, long-time net and cellular software developer Lee S. Barney exhibits you the way to exploit the QuickConnect and PhoneGap frameworks to create safe, fine quality, modular hybrid iPhone functions.   Lee S. Barney walks you thru the full hybrid iPhone improvement procedure, from developing nice person interfaces to compiling, deploying, and executing purposes. alongside the best way, he introduces ideas 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. insurance contains   utilizing Dashcode and Xcode jointly to create detailed, interesting hybrid iPhone functions utilizing the QuickConnect JavaScript API to accomplish initiatives starting from vibrating the telephone to gaining access to the accelerometer and GPS situation information having access to local iPhone performance utilizing the PhoneGap JavaScript API Storing, retrieving, and coping with info at the iPhone, even with out community entry utilizing XMLHttpRequest to entry or synchronize distant information and use internet companies developing Google-based maps to your personal app that paintings like these you spot within the iPhone’s Maps program   This booklet systematically lowers the boundaries to iPhone improvement, allowing net builders to construct any iPhone program they could think with no lengthy improvement cycles or steep studying curves!

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It is more like a soccer game. In a soccer game, each player is busy doing what needs to be done regardless of whether anyone else is also busy. It would be silly any other way. Imagine a game in which all players waited for other players to finish what they were doing before they started moving. Silly. Asynchronous computing behavior means that you can tell a function to do something, but processing continues without waiting to get anything back from the function. Thus, after this line executes, the results array appears to the rest of the code as if no asynchronous calls were made.

2, maps a command to a control function. 2 The Mapping Function API Method Signature Return Parameters MapCommandToValCF(command, validationControlFunction) Void command—A unique string representing the behavior you want processed. For example math. validationControlFunction—A validation function to execute when the command is received by the handleRequest function. MapCommandToBCF(command, businessControlFunction) Void command—A unique string representing the behavior you want processed. For example math.

Even the initWithColor and andMilkFatRatio make sense as setters or passers of the two needed parameters. However, what is actually going on and what do all those square brackets mean? Objective-C uses message passing for all interactions with objects and other items that might not be objects in other languages as they are in Objective-C. Examine this line of code: [Mammal alloc] Earlier, it was hinted that this code fragment is where an object whose type is Mammal is allocated space in RAM. ” The result of passing this alloc message to the Mammal class object is that a pointer to a new Mammal object is returned.

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