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 most recent model of Apple's Xcode three. All resource code has been up to date to take advantage of the most recent Xcode templates and present APIs, and all-new screenshots exhibit Xcode three in action.
Beginning iPhone four improvement is a whole path in iOS improvement. You’ll grasp concepts that paintings on iPhone, iPad, and iPod contact. we commence with the fundamentals, displaying you ways to obtain and set up the instruments you'll want, and the way to create your first easy software. subsequent you’ll discover ways to combine the entire interface components iOS clients have come to understand and love, resembling 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 artwork of desk construction can be demystified, and you’ll examine suggestions to save lots of and retrieve your facts utilizing SQLite, iPhone’s integrated database administration process and middle facts, the normal for endurance that Apple dropped at 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 help (pinches and swipes) on your functions, and paintings with the digital camera, picture library, accelerometer, and integrated GPS. You’ll realize the nice issues of software personal tastes and find out how to localize your apps for a number of languages. You'll additionally the right way to use the hot concurrency APIs integrated in iOS four, and make powerful multithreaded functions utilizing Grand principal Dispatch.
* The iPhone four replace to the best-selling and so much suggested booklet for Cocoa contact developers
* Written in an obtainable, easy-to-follow style
* filled with worthwhile suggestions and methods that will help you turn into an iOS seasoned
<h3>What you’ll learn</h3> * every thing you must understand to advance your individual best-selling iPhone and iPad apps
* most sensible practices for optimizing your code and supplying nice person studies
* easy methods to create “universal” apps for either iPhone and iPad
<h3>Who this publication is for</h3>
a person who desires to begin constructing for iPhone, iPad, and iPod contact.
Read or Download Beginning iPhone 4 Development: Exploring the iOS SDK PDF
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Additional info for Beginning iPhone 4 Development: Exploring the iOS SDK
A blue guideline should appear. Keep dragging until your cursor is over the label in the View window. Even though you won’t be able to see the label, it will magically appear once you are over it (see Figure 3–10). 55 56 CHAPTER 3: Handling Basic Interaction Figure 3–10. Control-dragging to connect outlets With the cursor still over the label, let go of the mouse button, and a small gray menu like the one shown in Figure 3–11 should pop up. Select statusText from the gray menu. By control-dragging from File’s Owner to an interface object, you are telling Interface Builder that you want to connect one of the File’s Owner’s outlets to this object when the nib file is loaded.
Typically, the declaration for an action method will look like this: - (IBAction)doSomething:(id)sender; The actual name of the method can be anything you want, but it must have a return type of IBAction, which is the same as declaring a return type of void. This is another way of saying that action methods do not return a value. Usually, the action method will take one argument, and it’s typically defined as id and given a name of sender. The control that triggers your action will use the sender argument to pass a reference to itself.
57 58 CHAPTER 3: Handling Basic Interaction Figure 3–12. The connections inspector showing our button’s available events Controls in Cocoa Touch offer a lot more possibilities, so instead of click-dragging from the control, it’s best to get in the habit of using the connections inspector, which we can get to by pressing 2 or selecting Connection Inspector from the Tools menu. Click the Left button, and then bring up the connections inspector. It should look like Figure 3–12. Under the heading Events, you’ll see a whole list of events that can potentially trigger an action.