By Jeff Kelley
The Cocoa contact frameworks and APIs are strong instruments for developing local iOS apps, and they are unfastened with Xcode, Apple's improvement setting. If you have got already gotten your toes rainy with Objective-C, and you are ready to benefit extra approximately iOS improvement, then study Cocoa contact for iOS is the booklet for you. research Cocoa contact for iOS indicates you ways to take advantage of frameworks like MapKit, Twitter, and MediaPlayer. you are going to additionally find out about APIs so that you can get the main from your accelerometer, digital camera, and extra. you will even know about extra complex beneficial properties like Grand critical Dispatch.
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The Cocoa contact frameworks and APIs are robust instruments for developing local iOS apps, and they are loose with Xcode, Apple's improvement atmosphere. If you've got already gotten your ft rainy with Objective-C, and you are ready to benefit extra approximately iOS improvement, then research Cocoa contact for iOS is the ebook for you.
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Additional info for Learn Cocoa Touch for iOS
Info CHAPTER 3: Managing On-Screen Content with View Controllers These methods are enough to provide great table views that allow your users to navigate information quickly, but sometimes you’ll need to modify the contents of a table view. Perhaps you’re syncing with the cloud in the background and more items have been added to the list, or the user needs to delete one. Whenever you need to modify the order of a table view or manage its contents, it’s a two-step process: first, tell the table view what changes are being made, and second, modify the data to reflect those changes.
It also makes your code much less likely to have errors in it, since the code g enerated b y t he c ompiler i s very w ell-tested-----and the compiler doesn’t make typos or get tired. Memory Management Memory is a precious resource on iOS devices. The original iPhone had 128MB of RAM, most of which was used by the OS. Four years later, the iPhone 4S has 512MB of RAM, still much less than modern systems running Mac OS X. That being the case, how we use the memory available to us is very important.
When Objective-C was in its early years, this was the best it got. Some developers would use third-party applications to create these methods to get and set their instance variables, which is a sign of how tedious it was. Thankfully, Apple added some new features to the language to make this easier. Properties Properties are a way to define accessor methods in your class. Instead of defining a getter and a setter for an instance variable, you can use a property to do so. Here’s an example of a property: @property (nonatomic, copy) NSString *firstName; The declaration tells us a few things.