By Jiva DeVoe
I've got many iphone programming books and not paid this e-book a lot awareness. lately although, i've been attempting to get a deeper comprehend of the interior workings of cocoa contact. this booklet is fantastic, its fairly made me comprehend the MVC process used whilst development iphone apps. the ebook is definitely written....and breaks issues right down to you in a truly systematic process. certainly suggest this e-book.
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Additional info for Cocoa touch for iphone os 3
It enables you to replace or change either the model or the view independently of each other. This flexibility is what it derives its power from. Chapter 5: Introducing UIViewController 41 So I’ve talked about the model and the view, but I have not yet talked about the controller. The controller is one of the often-misunderstood parts of the Model, View, Controller design pattern, but its functionality is actually very simple. The controller is essentially the gatekeeper between the model and the view.
I’m going through a lot of effort to explain this because when you look at Foundation, you’ll see that it’s not quite so simple. Foundation is the next layer of API beneath AppKit and UIKit. It includes NSString, NSArray, NSDictionary, and many other low-level classes. When it comes to these classes, generally speaking, most things are supported on both Cocoa and Cocoa Touch. However, there are some notable exceptions, in particular with regard to drawing things. On Cocoa, for example, NSString has a category that gives it the ability to draw NSStrings within a view.
What all this means is that there is simply no substitute for testing your app on actual hardware. Test, and test often. Don’t wait until the last minute and test it as an afterthought. Do it daily. Summary In this chapter, you’ve looked at the simulator in all its glory. You’ve dug into its filesystem and looked at how to interact with it. You’ve seen what capabilities are supported on the simulator and what are not. You’ve looked at the performance differences between the simulator and actual iPhone hardware.
Cocoa touch for iphone os 3 by Jiva DeVoe