By Paris Buttfield-Addison, Tim Nugent
Get on top of things on Cocoa and Objective-C, and begin constructing functions at the iOS and OS X systems. in case you don’t have event with Apple’s developer instruments, no challenge! From object-oriented programming to storing app information in iCloud, the fourth version of this ebook covers every thing you want to construct apps for the iPhone, iPad, and Mac.
You’ll easy methods to paintings with the Xcode IDE, Objective-C’s origin library, and different developer instruments corresponding to occasion equipment framework and middle Animation. alongside the way in which, you’ll construct instance tasks, together with an easy Objective-C software, a customized view, an easy video participant software, and an app that monitors calendar occasions for the user.
- Learn the appliance lifecycle on OS X and iOS
- Work with the user-interface process in Cocoa and Cocoa Touch
- Use AV starting place to demonstrate video and audio
- Build apps that allow clients create, edit, and paintings with documents
- Store information in the neighborhood with the dossier process, or at the community with iCloud
- Display lists or collections of knowledge with desk perspectives and assortment views
- Interact with the surface international with center position and middle Motion
- Use blocks and operation queues for multiprocessing
Read Online or Download Learning Cocoa with Objective-C: Developing for the Mac and iOS App Stores PDF
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Additional resources for Learning Cocoa with Objective-C: Developing for the Mac and iOS App Stores
There’s an extra problem—the variety of photographs being drawn in the course of startup is inflicting an incredible slowdown. the appliance is growing and putting one thousand photo perspectives onto the monitor. each one photo displayed by means of the picture perspectives has to be stored in reminiscence, because of this the app swiftly runs out of area and is compelled to go out. a greater technique to deal with this can be to simply reveal the pictures that the person is ready to see, instead of loading them all right away. At minimal, there are just 3 photographs that must be present—the one at the moment being proven, and the 2 on each side of it. as a result of dimension of the picture perspectives, it’s attainable for this app to be displaying one or photographs even as, yet by no means 3. to mend the matter, for that reason, we have to make the appliance replace the picture perspectives whereas the person is scrolling. If a picture view isn’t obvious by means of the consumer, the app may still eliminate it from the display, which frees up reminiscence. to do that, we’ll upload a style that makes yes that the picture perspectives for the former, present, and subsequent pages are current, after which eliminates all different photograph perspectives. this technique can be referred to as each time the scroll view scrolls, that means that so far as the consumer is anxious, each picture is at the monitor whilst she must see it. First, we’ll organize the view controller to be notified whilst the scroll view scrolls, after which upload the code that exams the picture perspectives. eventually, we’ll replace the viewDidLoad approach to make it simply exhibit the 1st set of photo perspectives. Open the storyboard and make the scroll view use the view controller as its delegate. Control-drag from the scroll view onto the view controller’s icon. decide on “delegate” from the checklist that pops up. Open ViewController. h. We now have the desire to make the category agree to the UIScrollViewDelegate protocol. change the class’s definition with the subsequent line of code: @interface ViewController : UIViewController