Beginning iPhone 4 Development: Exploring the iOS SDK by Jeff LaMarche, David Mark, Jack Nutting

By Jeff LaMarche, David Mark, Jack Nutting

The authors of the bestselling starting iPhone three improvement are again, with a similar first-class fabric thoroughly up to date for iOS four and written from the floor up utilizing the newest model of Apple's Xcode three. All resource code has been up to date to exploit the most recent Xcode templates and present APIs, and all-new screenshots express Xcode three in action.

Beginning iPhone four improvement is a whole path in iOS improvement. You’ll grasp suggestions that paintings on iPhone, iPad, and iPod contact. we commence with the fundamentals, exhibiting you the way to obtain and set up the instruments you'll desire, and the way to create your first easy software. subsequent you’ll discover ways to combine all of the interface parts iOS clients have come to grasp and love, equivalent to buttons, switches, pickers, toolbars, and sliders. You’ll grasp quite a few layout styles, from the best unmarried view to complicated hierarchical drill-downs. The complicated paintings of desk development can be demystified, and you’ll study recommendations to save lots of and retrieve your facts utilizing SQLite, iPhone’s integrated database administration procedure and center information, the traditional for endurance that Apple delivered to iOS with the discharge of SDK 3.  

And there’s even more! You’ll discover ways to draw utilizing Quartz second and OpenGL ES, upload multitouch gestural aid (pinches and swipes) on your functions, and paintings with the digital camera, photograph library, accelerometer, and integrated GPS. You’ll notice the nice issues of program personal tastes and tips on how to localize your apps for a number of languages. You'll additionally how to use the recent concurrency APIs integrated in iOS four, and make powerful multithreaded functions utilizing Grand important Dispatch.  
* The iPhone four replace to the best-selling and so much suggested e-book for Cocoa contact developers  
* Written in an obtainable, easy-to-follow style  
* packed with beneficial assistance and strategies that will help you develop into an iOS seasoned
<h3>What you’ll learn</h3> * every little thing you must comprehend to improve your personal best-selling iPhone and iPad apps
* most sensible practices for optimizing your code and offering nice person reviews
* how one can create “universal” apps for either iPhone and iPad
<h3>Who this booklet is for</h3>
someone who desires to commence constructing for iPhone, iPad, and iPod contact.

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A Screen Full of Controls As we mentioned, the application we’re going to build in this chapter is a bit more complex than the one we created in Chapter 3. We’re still going to use only a single view and controller, but as you can see in Figure 4–1, there’s quite a bit more going on in this one view. 61 62 CHAPTER 4: More User Interface Fun Figure 4–1. The Control Fun application, featuring text fields, labels, a slider, and several other stock iOS controls The logo at the top of the iPhone screen is an image view, and in this application, it does nothing more than display a static image.

First, we added this: @synthesize statusText; This is how we tell the compiler to automatically create the accessor and mutator methods for us. By virtue of this line of code, there are now two “invisible” methods in 43 44 CHAPTER 3: Handling Basic Interaction our class: statusText and setStatusText:. We didn’t write them, but they are there nonetheless, waiting for us to use them. text = newText; [newText release]; } Remember that the parameter passed into an action method is the control or object that invoked it.

Creating Our Project It’s time to create our next Xcode project. We’re going to use the same template that we used in the previous chapter: View-based Application. By starting with this simple template again, it will be easier for you to see how the view and controller objects work together in an iOS application. We’ll use some of the other templates in later chapters. Go ahead and create your project, setting the Product popup to iPhone, and saving it under the name Button Fun. If you have any trouble creating your project, refer to the preceding chapter for the proper steps.

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