iPhone Programming Tutorial – UITableView Hello World

In this tutorial I will walk to you through creating a simple “Hello World” application using a UITableView for the iPhone.  There are many ways that a Hello World program could be made on the iPhone, I am going to show you the simplest.  This tutorial assumes you have a basic understanding of Objective-C.  Apple has provided a very simple and straight forward tutorial on Objective-C.  You can find it here.
You will learn how to:

• Create a New Navigation-Based Application
• Learn About the Default Files
• Update the UITableView Cells to Display “Hello World” Text

This tutorial assumes that you have already installed the iPhone SDK.  If you are unsure how to do this, click and follow the steps.

simple Navigationbased tutorial

It’s time to start displaying some drinks. You’ll need to make some modifications to both the RootViewController.h and RootViewController.m files

1Declare the drinks array.(in RootViewController.h )

@interface RootViewController : UITableViewController{
NSMutableArray* drinks;
}
@property (nonatomic, retain) NSMutableArray* drinks;
@end

(RootViewController.m)

@synthesize drinks;

-(void)dealloc{

[drinks release];

[super dealloc];

}

2 Implement and populate the array.(in RootViewController.m)
In RootViewController.m, uncomment and expand the ViewDidLoad methods.
Tell the table how many rows you have.
Populate the table cells.

- (void)viewDidLoad { [super viewDidLoad];
RootViewController.m
NSMutableArray* tmpArray = [[NSMutableArray alloc]

initWithObjects:@”Firecracker”, @”Lemon Drop”, @”Mojito”,nil];
self.drinks = tmpArray; [tmpArray release];
// Uncomment the following line to display an Edit button in

//the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self. editButtonItem;
}

3 Tell the table how many rows you have.

//Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [self.drinks count];

4 Populate the table cells

// Configure the cell.
cell.textLabel.text = [self.drinks objectAtIndex:indexPath.row];

return cell;
}

Now you’re ready to go. Save it, build and run, and you’ll see the three drinks in your app in the main view.