An iPhone app is a program that runs
on our iPhone/iPod Touch. It enables us to accomplish a certain task. They could
be utility apps, games, enterprise apps, entertainment apps, apps to access our
bank account etc.
NSXMLParser is a forward only reader or an event driven parser. What it means is, an event is raised whenever the parser comes across a start of an element, value, CDATA and so on. The delegate of NSXMLParser can then implement these events to capture XML data. Some of the events are raised multiple times like the start of an element, value of an element and so on. Since NSXMLParser is known as an event driven parser, we can only read data at the present node and cannot go back. The iPhone only supports NSXMLParser and not NSXMLDocument , which loads the whole XML tree in memory. Books Application To understand how to use an instance of NSXMLParser, let’s create a simple navigation based application where we will list the title of the book in the table view and upon selecting a title, display the detail information in a detail view. Click here to see the sample XML file, used in this application. Create a new application in XCode by selecting Navigation-Based Application,
Here’s one way to draw a PIE chart using the latest iPhone SDK. There are a ton of tutorials out there that let you get started with the iPhone app development itself and I am by no means any authoritative source on learning how to develop one. Having said that, here’s a class file that will help you use the UIKit and Quartz to draw vector graphics. GraphView.h 1 2 3 4 5 6 7 8 9 10 11 12 # #(nothing to see here) # #import <UIKit/UIKit.h> #import <Foundation/Foundation.h> @interface GraphView : UIView { } @end GraphView.m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 #import "GraphView.h" #define PI 3.14159265358979323846 static inline float radians ( double degrees ) { return degrees * PI / 180 ; } @implementation GraphView - ( void ) drawRect : ( CGRect ) rect { CGRect parentViewBounds =
Xcode 4 is the latest iteration of Apple’s integrated development environment (IDE), a complete tool set for building Mac OS X and iOS applications. The Xcode IDE includes a powerful source editor, a sophisticated graphical UI editor , and many other features fromhighly customization builds to support for source code repository management. Xcode can help you identify mistakes in both syntax and logic, and will even suggest fixes. Xcode 4 features a single window, called the work space window , that holds most of the data you need. A second window, called the Organizer window , is used for organizing your projects and reading documentation. For iOS projects, the Organizer window is also used to manage devices. Xcode 4 has many features to make your job easier. Xcode 4 has a single-window interface for all major workflows (you can have multiple workspace windows and multiple tabs per window). Interface Builder is a fully integrated